Wireless sensors - ARClim · 2014. 6. 23. · 3 ENG “Wireless Probes” +030220666 - rel. 1.0 - 16.09.2008 WARNINGS CAREL bases the development of its products on decades of experience

I n t e g r a t e d C o n t r o l S o l u t i o n s & E n e r g y S a v i n g s

User manual

for monitoring refrigerated cabinet temperature

Wireless sensors

3

ENG

“Wireless Probes” +030220666 - rel. 1.0 - 16.09.2008

WARNINGS

CAREL bases the development of its products on decades of experience in HVAC, on the continuous investments in technological innovations to products, procedures and strict quality processes with in-circuit and functional testing on 100% of its products, and on the most innovative production technology available on the market. CAREL and its subsidiaries nonetheless cannot guarantee that all the aspects of the product and the software included with the product respond to the requirements of the fi nal application, despite the product being developed according to start-of-the-art techniques. The customer (manufacturer, developer or installer of the fi nal equipment) accepts all liability and risk relating to the confi guration of the product in order to reach the expected results in relation to the specifi c fi nal installation and/or equipment. CAREL may, based on specifi c agreements, acts as a consultant for the positive commissioning of the fi nal unit/application, however in no case does it accept liability for the correct operation of the fi nal equipment/system.

The CAREL product is a state-of-the-art product, whose operation is specifi ed in the technical documentation supplied with the product or can be downloaded, even prior to purchase, from the website www.carel.com.Each CAREL product, in relation to its advanced level of technology, requires setup / confi guration / programming / commissioning to be able to operate in the best possible way for the specifi c application. The failure to complete such operations, which are required/indicated in the user manual, may cause the fi nal product to malfunction; CAREL accepts no liability in such cases.Only qualifi ed personnel may install or carry out technical service on the product.The customer must only use the product in the manner described in the documentation relating to the product.

In addition to observing any further warnings described in this manual, the following warnings must be heeded for all CAREL products:

prevent the electronic circuits from getting wet. Rain, humidity and all • types of liquids or condensate contain corrosive minerals that may damage the electronic circuits. In any case, the product should be used or stored in environments that comply with the temperature and humidity limits specifi ed in the manual;do not install the device in particularly hot environments. Too high • temperatures may reduce the life of electronic devices, damage them and deform or melt the plastic parts. In any case, the product should be used or stored in environments that comply with the temperature and humidity limits specifi ed in the manual;do not attempt to open the device in any way other than described in the • manual;do not drop, hit or shake the device, as the internal circuits and mechanisms • may be irreparably damaged;do not use corrosive chemicals, solvents or aggressive detergents to clean • the device;do not use the product for applications other than those specifi ed in the • technical manual.

All of the above suggestions likewise apply to the controllers, serial boards, programming keys or any other accessory in the CAREL product portfolio.CAREL adopts a policy of continual development. Consequently, CAREL reserves the right to make changes and improvements to any product described in this document without prior warning.The technical specifi cations shown in the manual may be changed without prior warning.

The liability of CAREL in relation to its products is specifi ed in the CAREL general contract conditions, available on the website www.carel.com and/or by specifi c agreements with customers; specifi cally, to the extent where allowed by applicable legislation, in no case will CAREL, its employees or subsidiaries be liable for any lost earnings or sales, losses of data and information, costs of replacement goods or services, damage to things or people, downtime or any direct, indirect, incidental, actual, punitive, exemplary, special or consequential damage of any kind whatsoever, whether contractual, extra-contractual or due to negligence, or any other liabilities deriving from the installation, use or impossibility to use the product, even if CAREL or its subsidiaries are warned of the possibility of such damage.

DISPOSAL

INFORMATION FOR USERS ON THE CORRECT HANDLING OF WASTE ELECTRICAL AND

ELECTRONIC EQUIPMENT (WEEE)In reference to European Union directive 2002/96/EC issued on 27January 2003 and the related national legislation, please note that:

WEEE cannot be disposed of as municipal waste and such waste must be 1. collected and disposed of separately;the public or private waste collection systems defi ned by local legislation 2. must be used. In addition, the equipment can be returned to the distributor at the end of its working life when buying new equipment.the equipment may contain hazardous substances: the improper use or 3. incorrect disposal of such may have negative eff ects on human health and on the environment;the symbol (crossed-out wheeled bin) shown on the product or on the 4. packaging and on the instruction sheet indicates that the equipment has been introduced onto the market after 13 August 2005 and that it must be disposed of separately;in the event of illegal disposal of electrical and electronic waste, the 5. penalties are specifi ed by local waste disposal legislation.

Warranty on materials: 2 years (from the date of production, excluding consumables).

Certifi cation: he quality and safety of CAREL products are guaranteed by the ISO 9001 certifi ed design and production system.

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Contents1. INTRODUCTION 7

1.1 Wireless sensors for refrigeration .................................................................. 71.2 Advantages of the CAREL solution ................................................................. 71.3 Terminology ......................................................................................................... 71.4 Advantages of the wireless system ................................................................. 7

2. CAREL WIRELESS RTM SYSTEM COMPOSITION 10

2.1 Application examples ................................................................................... 102.3 General features of the system ................................................................. 112.4 General notes ................................................................................................ 122.5 Reference standards ..................................................................................... 122.6 Using the Router-Bridge .............................................................................. 12

3. BP SENSOR (BUILT-IN SENSOR) 13

3.1 Functions implemented and supervisor variables available ..................... 133.2 Sensor confi guration .................................................................................... 133.3 Sensor activation ........................................................................................... 143.5 Installation notes ........................................................................................... 163.4 Technical specifi cations ................................................................................ 163.6 Physical dimensions ......................................................................................173.7 Replacing the battery in the BP sensor .............................................................17

4. EP SENSOR (EXTERNAL SENSOR) 18

4.1 Functions implemented ............................................................................... 184.2 Sensor confi guration .................................................................................... 184.3 Binding procedure ........................................................................................ 184.4 Description of parameters and functions ................................................ 194.6 Technical specifi cations ................................................................................ 214.7 EP sensor installation notes ........................................................................ 214.8 Physical dimensions .....................................................................................224.9 Electrical connections ...................................................................................224.10 Application example ......................................................................................224.11 General warnings ............................................................................................22

5. ACCESS POINT 23

5.1 Main functions ...............................................................................................235.2 Parameters and functions ..........................................................................235.3 Confi guration ................................................................................................245.4 Setting the address .......................................................................................245.5 Binding procedure ........................................................................................255.6 Resetting the device .....................................................................................255.7 Technical specifi cations ................................................................................265.8 Physical dimensions .....................................................................................265.9 Electrical connections ...................................................................................265.11 General warnings:...........................................................................................26

6. ROUTER-BRIDGE 27

6.1 Parameters and functions ..........................................................................276.2 Associating the Router-Bridge to the Access Point ................................276.3 Resetting the device .....................................................................................276.4 Technical specifi cations ...............................................................................286.5 Physical dimensions .....................................................................................286.6 Electrical connections ...................................................................................286.8 General warnings .........................................................................................28

7. GENERAL NOTES 29

7.1 Notes for correct installation ......................................................................297.2 Power supply connection ............................................................................297.3 Wiring ..............................................................................................................29

8. GENERAL INSTALLATION NOTES 30

8.1 Layout examples ........................................................................................... 31

9. LIST OF SUPERVISOR VARIABLES 33

9.1 List of parameters and variables, BP sensor ...........................................339.2 List of parameters and variables, EP sensor ...........................................349.3 List of parameters and variables, Access point Modbus®version 359.4 List of parameters, Router-Bridge ..............................................................35

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1. INTRODUCTION

1.1 Wireless sensors for refrigeration CAREL has developed a new family of rTM wireless sensors (Remote Temperature Monitoring) for monitoring cabinet temperature and alarms, saving the events in accordance to the HACCP regulations. The sensors not need any wiring, as they are battery powered, use a ZigBee wireless connection with mesh technology, and are designed to be connected to the most common BMS supervisory systems that use Modbus® communication.Two models are available:

With internal temperature sensor, model BP (Built-in sensor - positioned • inside the refrigerated cabinet);With two external NTC sensors and two digital inputs, model EP • (External sensor) typically used in cold rooms.

This solution can achieve considerable cost advantages in terms of reduced installation costs (no wiring), as well as fl exibility in organising the layout of the supermarket and allowing faster retrofi t installation.

Wireless sensor with built-in sensor (model BP)

Wireless sensor with external sensors (model EP)

Fig. 1.a

1.2 Advantages of the CAREL solutionThe Carel rTM is an advantageous solution in terms of:

Flexibility:• possibility to manage fl exible spaces very simply, thus reorganising the layout of a supermarket or an offi ce without having an impact on the wired network (communication and power supply);Simple installation:• ideal for retrofi t installations that require connection to a supervisor where electrical wires cannot be laid, i.e. properties that do not have raised fl oors or false ceilings;Reduced installation costs;• Easy commissioning/service;• Integration with the most commonly-used BMS• (Building Management Systems);Standard ZigBee™ technology• , used for wireless communication ensures high security of the data exchanged, including data encrypting and unique identifi er (MAC-address) as further guarantees of security;Mesh layout • for the wireless network between Access Point, Router-Bridge and Sensors;Guaranteed supervision • with systems separate from the controller, adding extra safety.

Note: ZigBee wireless connection without interoperability.

1.3 TerminologyWireless•

Wireless means “without wires”, in contrast to the term wired.

Wireless network• Communications system (series of devices, appliances, methods and protocols) for the transmission of information via radio, typically radio-frequency technology used instead of wired connections, making the systems particularly fl exible.

ZigBee™• Zigbee™ is a set of specifi cations based on the IEEE-802.15.4 standard for the creation of Wireless Personal Area Networks (WPAN). Comparable in some ways to Bluetooth, it stands out for its very low power consumption and the reduced cost of implementation, despite having a maximum data transfer speed of 250 kbit/s. ZigBee™ devices, with compact dimensions and low costs, are designed to work in dedicated self-organised networks (Mesh networks) and are used in many fi elds.

1.4 Advantages of the wireless solution1.4.1 Advantages of a wireless network over a wired network

Mobility of the sensors;• Ease of installation and connection of the devices;• Coverage even where obstacles are present;• Flexibility in the event of structural modifi cations;• Reduction in wiring costs;• Sturdiness.•

The advantages of wireless networks can overcome some of the intrinsic limits in wired systems. Typical network infrastructure features a wired backbone with wireless access.

1.4.2 Advantages of ZigBee™Standard technology;• Reduced costs;• Can be used globally;• Reliable;• Supports a large number of nodes;• Easy confi guration;• Long battery life;• Secure data transmission.•

Dis

tanz

a

ConsumoVelocità

Fig. 1.bAll the brands and names used in the diagram above are registered and are the property of their respective owners

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1.4.3 The advantages of working at 2.4 GHz

Band of frequencies

No. of channels

Data parameters Use

Symbol rate

Bit rate Mapping

868-868.6 MHz

1 20Kbit/s 20 Kbaud Binary Europe

902-928 MHz 10 40Kbit/s 40 Kbaud Binary North America

2.4-2.4835 GHz

16 250Kbit/s 62.5 Kbaud 16-ary or-thogonal

Worldwi-de

Tab. 1.aThe band centred around 2.45 GHz (used in the wireless sensor system for refrigeration) is the only one that can be used all over the world, wi-thout needing to apply for special licenses. In addition, the ISM band (In-dustrial, Scientifi c and Medical) exploits the full potential of the standard, that is, can use 16 transmission channels with a bit rate of 250 kbit/s.

1.4.5 Type of Carel wireless network (MESH)

Legenda:

ZigBee™ End-Device: Sensors BP and EP (S)

ZigBee™ Router-Bridge (R)ZigBee™ Coordinator - Access point (AP)

RS 485 ModBus

S

S

S

S

S S

R R

S

S

S S

S

RS

S

S

S

S S

AP

Fig. 1.c

1.4.4 Types of nodesZigBee™ Access point - coordinator and Gateway;•

Must be available and ON in every network; Coordinates the creation of the network;

ZigBee™ Router-Bridge ;• Participates in the delivery of the messages, and must always be ON; Node with routing function. Local wired network bridge;

ZigBee™ End-Device (sensors);• Node with limited wireless functions; Low power consumption; Low cost;For data communication with the Access Point, the end device uses a “parent” for eff ective wireless transmission; this may be a Router-Bridge or the Access Point itself.

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1.4.6 Example of a Mesh network

RS 485 ModBus

R AP

RR

The MESH layout, used in the wireless sensor system for refrigeration between coordinator nodes (access points) and router-bridge devices, ensures a high tolerance to faults, as if one sensor loses wireless communication, the radio signal still manages to fi nd an alternative route to reach the destination.

Fig. 1.d

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2. CAREL WIRELESS rTM SYSTEM COMPOSITIONThe rTM system is made up of:

Wireless sensors: • available in two versions (BP and EP): these measure the status of the inputs (temperature/and and digital input) and send the data wirelessly to the Access Point. Communication between the sensors and the access point is two-way. The sensors, as well as sending the change in the status of the variables, can also receive data;Access point:• RS485/ZigBee™ gateway confi gured to acquire information from the sensors. Communicates over RS485 using the Modbus® RTU protocol;Router-Bridge:• ZigBee™ to ZigBee™ device that repeats the wireless signals so as to cover greater distances between access points and when needing to expand the network of sensors over a higher number of units;Modbus• ® supervisor system: Carel PlantVisorPRO or PlantWatchPRO.

2.1 Application examples

2.1.1 Supermarket showcases

Fig. 2.a

Counter showcase Wall mounted display case Island display case

Fig. 2.aa

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RS 4

85 M

odBu

s

Router/Bridge

1 2 3 4 5 6 7

R R R R R R R

Access point

Router-Bridge

Max 60 sensors

2.1.2 Layout and connection example in a supermarket installation

Fig. 2.b

Example:

Fig. 2.c

2.3 General features of the systemMaximum distance between Access Point/Router-Bridge and Sensors • in open fi eld (outdoors): 100 m.Maximum distance between Access Point/Router-Bridge and Sensors • with fi eld of sight (indoors): around 30 m (inside rooms and built-up areas).Transmission frequency: selectable from 2405 to 2480Mhz.• Number of channels available: 16. • Transmission power:•

- Access point, Router-Bridge and EP sensor: -1 dBm, - BP sensor: -3 dBm.

Wireless protocol: ZigBee™ without interoperability.• Standard: 802.15.4.• Reception sensitivity: -90dB.•

For sensors only: Maximum current: 35mA, in transmission.• Current in standby: 1μA.• Maximum HOP levels: 7 (hops).• Maximum number of wireless network devices:•

- 30 for each Access Point or Router-Bridge (up to 60 units); - 16 Router-Bridges directly connectable to the Access Point; - 16 Router-Bridge directly connectable to each Router-Bridge.

Maximum number of devices in Modbus• ® RS485 network: - 7 Access point; - 111 Sensors; - In Modbus® network in combination with other devices up to max 199 units.

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2.4 General notesThe radio range of the devices is around a hundred metres in an open • fi eld, that is, without any obstacles.In a closed fi eld the range varies signifi cantly based on the type of • environment and the surrounding objects (shelves, furniture, metal walls etc.). Thick partition walls or reinforced ceilings and fl oors may represent • impassable obstacles.The ideal position of the devices, especially the routers, often cannot • be defi ned theoretically but must be found by trial and error in the actual installation.

2.5 Reference standardsThe Carel wireless sensors have been tested in accordance with the following standards:

INDUSTRIAL ENVIRONMENTSEN61000-6-4, EN61000-3-2, EN61000-3-3, EN61000-6-2 ETSI EN 301 489-17 V1.2.1, ETSI EN 301 489-1 V1.4.1

DOM., COMM. & LIGHT IND. ENVIRONMENTSEN61000-6-3; EN61000-3-2, EN61000-3-3; EN61000-6-1

2.6 Using the Router-BridgeWhen does the Router-Bridge need to be installed?The Router-Bridge is required whenever a direct connection is not possible between the Access Point and the Sensor; this may occur when:• The distance between Access point and Sensor is greater than 30 m MAX with visibility between the instruments.

• There is no visibility between the Access Point and the Sensor, and/or there is shielding infrastructure that reduces the wireless communication distance.

• In addition, the Router-Bridge is required if the number of Sensors managed exceeds 30 devices.

In addition, this is used to improve the reliability of the wireless connection, the Router-Bridge network can in fact fi nd an alternative path if one of the direct connections between the sensors and the access point fails. Recommended:

1-15 sensors 1 Router-Bridge;• 16-30 sensors 2 Router-Bridge;• 31-45 sensors 3 Router-Bridge;• 46-60 sensors 4 Router-Bridge.•

Access point

Access pointRouter-Bridge

30 m M

ax

30 m M

ax

30 m M

ax

Roouter-Bridge

Access pointAccess point

Fig. 2.d

Fig. 2.e

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BP P

robe

3. BP SENSOR (BUILT-IN SENSOR)The BP sensor is designed to be positioned directly inside the showcases, fi tted using its own fastening bracket.The rear features metal shielding that, combined with the thermal insulation inside the shell, prevents the formation of frost at the rear of the sensor, and consequently better thermally insulation of the wall.

3.1 Functions implemented and supervisor variables available

Instant temperature measurement performed every minute.• Measurement fi ltering with weighted average based on parameter • setting for product temperature simulation.Data transmission at settable intervals, in minutes (the parameter • aff ects battery life).Monitoring of temperature thresholds for high temperature (HACCP) • or low temperature (product freezing) alarm signals.Automatic mode with preset parameters according to the showcase/• display case (normal, low temperature or shelf ).Local mode for Clean showcase status signal. Activating the Clean • button disables the high temperature alarms.TimeStamp for recording the instant measurement, expressed in • hh:mm.Battery level in mV and residual charge in mAh.• Wireless signal level in dBm +100 (10 = low signal, 30 = medium • signal).Temperature alarm status related to the high and low thresholds•

3.2 Sensor confi gurationThe sensor is supplied by Carel with the address set to 127; confi guration requires a Commissioning Tool, used to assign the desired network address, with the rTM Manager program. For further explanations on this procedure, see the specifi c documents.

3.2.1 Binding procedureBinding is a special procedure used to associate the sensors with the Access Point. Once completed, the sensors will send the temperature data measure wirelessly only to the Access Point defi ned as its parent. Following this, the Access Point will forward the data to the Modbus® RTURS485 serial network.Before performing this operation, make sure that the sensor serial address has been set.The binding procedure requires the activation of the communication channel on the Access Point or Router-Bridge and the activation of the confi guration switch SW1 using a magnet (see Fig. 3.c). The network binding status is signalled by the red LED, which comes on for a few seconds. If the operation is successful, successively activating switch SW1 will start manual data transmission, signalled from brief fl ashing of the green LED. If the automatic or manual data transmission fails, the red LED will fl ash briefl y after the green LED comes on. If the sensor is activated, remove the magnet in the OFF position. After this operation the sensor will start sending data on the temperature measured, in the time interval set by parameter. Check that the LED comes on for a few seconds at regular intervals.

3.2.2 Resetting the sensorThe reset procedure is required when the sensor needs to be moved and associated with another wireless network (diff erent Access Point). This operation may be required to reconfi gure the sensor in a diff erent wireless network. The value of the serial address remains the same, and after a new binding operation the sensor is reactivated in the wireless network. To reset the sensor, keep SW1 activated using the magnet for 10 seconds, until the yellow LED comes on.

Note:1. The sensor can only be reset if it has already been associated with an Access Point/Router-Bridge.2. Resetting the sensor does not delete the space reserved inside the Access Point, which will continue to maintain the data saved inside. Note that, after resetting the sensor, the number of devices set for the Access Point remains unchanged. Realignment will occur after a maximum of around 2 hours.3. Important: pay careful attention to avoid duplicate assignment of network serial addresses, so as to avoid overlapping temperature values.

3.2.3 Meaning of the switches and LED signals

CLEAN

SW2

SW1

Led

NTC

Fig. 3.aKey: SW1 Internal magnetic confi guration switch (above the LED, near the edge), can be activated with external magnet;SW2 CLEAN (open → CLEAN MODE)LED Two-colour, red/green NTC Located inside the case in thermal contact directly with the front wall.

Signal status LED (Red, Green , Yellow=R+G) OutcomeData transmission Green (½ second)

Green (½ second) + Red shortOK

NOT Ok , Start Retry

Binding (network association)

Yellow + Green long OK

Reset sensor (network disassociation)

Yellow for 2 sec. + fl ash Yellow long

OK

CLEAN mode in/out Red + Green in sequence OKReset device (Pw-ON) Yellow fl ashing for 2 s quickly OK

Tab. 3.a Note: the LED is two-colour, red and green, which becomes yellow when both LEDs are on at the same time.

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BP P

robe

3.3 Sensor activationThe sensor is supplied with the battery connected in sleep mode (no transmission-minimum consumption) and the sensor in standby mode; nothing is transmitted until movement of the CLEAN switch is activated (sleep status). Activation is not reversible, and the sensor will send the temperature measured every 16 min (default value).The Access Point and Router-Bridge must be powered and assigned with their own network address (see the chapters on the Access Point and Router-Bridge).After having opened the domain on the Access Point/Router-Bridge (see the procedure in the chapter on the Access Point):• Activate the CLEAN switch, moving it to on (SW2);• Check that the LED comes on for a few seconds;• Return the CLEAN switch to the off position;• The LED on the sensor remains on until correctly connected to the Access Point/Router-Bridge, if already associated with the network.

Led

Posizione switch OFFPosizione switch ON

Fig. 3.b

3.3.1 Parameters and functionsThe BP wireless sensor reads the temperature and manages the associated alarms at one minute intervals. The data is then transmitted at the intervals set by parameter, according to the application and the expected battery life. The sensors work most of the time in low power mode, so as to save battery power. They are activated to make the measurements and send the data at the preset time. Activate switch SW1 to send the sensor data manually, or check the connection. The CLEAN button is used to set cleaning status or deactivate the showcase, thus disabling the high temperature alarms. When returning from CLEAN mode, the high temperature alarms are disabled for a time equivalent to the auto-confi guration cycle (AUTO_DELAY).The sensor takes individual instant temperature measurements, however can also provide a weighted average, used to better approximate the product temperature.The logic for the alarms and all the other functions depends on the instant temperature measurement.

3.3.2 Wireless network management and data transmission parametersVariable index

Name Description Def. Min Max UoM Type R/W

HR_00 CMD_PASSW_1 Command Password (1)

- - - - R/W

HR_01v TRANSM_CYCLE TX data cycle time (sec)

960 60 3600 sec R/W

CS_00 EN_CMD_PW Trig. PWD internal Use

0 0 1 - R/W

Tab. 3.b CMD_PASSW_1 and EN_CMD_PW = only used by confi guration systems

TRANSM_CYCLE = Defi nes the wireless data transmission time to the Access Point. The value is set in seconds, but must correspond (rounded off ) to a multiple of 60, thus in minutes.

Note 1: to maximise battery life, set as few transmissions as possible;Note 2: data transmission is activated automatically in the following situations:- change in status of CLEAN mode (SW2);- activation of the internal magnetic switch (SW1);In all other cases, data transmission is defi ned by the set transmission cycle.

3.3.3 Temperature measurement and battery parametersVa-riable index


IR_06 AVG_TEMPERATURE Temperature average Value (1/10°C)

- -40.0 80.0 °C R

IR_07 TEMPERATURE Temperature Value (units 1/10°C)

- -40.0 80.0 °C R

IR_08 BATTERY_CHARGE Counter battery remaining charge

- 0 2500 mAh R

IR_05 BATTERY_LEVEL Battery Level (mV)

- 2600.0 4600.0 mV R

HR_06 AVERAGE_PARAM Parameter Avg-readings

8.0 0.0 60.0 - R/W

IS_00 ALM_BATTERY Battery Alarm - 0 0 1 RIS_01 ALM_GENERAL Unit Alarm

General- 0 0 1 R

IS_02 ALM_Sensor_1 Temperature sensor Alarm

- 0 0 1 R

HR_09 OFFS_TEMP Off set Temperature Measure

0 -9.9 9.9 °C R/W

Tab. 3.cAVG_TEMPERATURE = Temperature value calculated as the weighted average (in tenths of a degree °C);

TEMPERATURE = Instant temperature value (in tenths of a degree °C). The values are limited in the range from -40 to + 80.0 °C;

OFFS_TEMP = Temperature measurement off set, within a maximum of ±9.9 °C;

BATTERY_CHARGE = Defi nes the residual charge, counting power consumption corresponding to the operations eff ectively carried out. This can be used, together with the BATTERY_LEVEL value, for a more complete evaluation of battery charge status. Full charge 2500 mAh.

BATTERY_LEVEL = Battery voltage value (mV). The rated value is 3600 mV, below 2800 mV the battery is discharged. In normal operating conditions, the following table shows the typical battery life according to the transmission time set.

AVERAGE_PARAM = Weight for calculating the average, as per the formula with weight M.

Transmission time in min. Sensor battery life in years1 35 5

10 815 8

IMPORTANT: if the device does not communicate correctly with the Access Point (due to problems of distance or interference) the battery life may be reduced due to the continuous attempts to restore the connection to the Access Point/Router-Bridge.

ALM_Sensor_1 = Temperature measurement alarm. This may be caused by a value outside of the maximum range or by the sensor (inside the sensor) being open or short-circuited.

ALM_GENERAL = Provides a general sensor fault signal;

ALM_BATTERY = Provides the fl at battery signal (1 if < 2800 mV).

Note: - The temperature measurement, with the update of the instant and average values, is performed at 1 minute intervals;- The average temperature value is calculated using the following formula:

Temp_AVG = (Temp_AVG-1 * (M - 1) + Temp_Ist) / M

Where: Temp_AVG-1 Previous average temperature value Temp_Ist Instant temperature measurement M Weighted average value (= AVERAGE_PARAM)

- The average function also introduces an average measurement delay with a time constant equal to the average weight value (in minutes).

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3.3.5 Operating mode auto-confi guration parametersVariable index


HR_05 MODE_AUTO_TRESH

Threshold Auto Temp. (1/10°C)

12.0 0.0 50.0 °C R/W

HR_07 AUTO_DELAY Delay for AUTO-Confi g

12.0 2 254 Min R/W

HR_08 MODE_PARAM Par. MODE for cabinets

1 0 3 - R/W

CS_02 EN_AUTO_CONF Enable auto confi guration MOD

0 0 1 0 R/W

CS_03 EN_SCAFFALE Type of cabinet (1=shelf

0 0 1 0 R/W

Tab. 3.eMODE_AUTO_TRESH = Defi nes a threshold in °C below which the procedure for the automatic recognition of the type of showcase is activated;

AUTO_DELAY = Defi nes a delay time for the evaluation of the type of showcase when auto-confi guration mode is enabled.

MODE_PARAM = Defi nes the values to be assigned or auto-assigned for the identifi cation of the eff ective operating mode. For each of the four modes, the associated parameters can be set separately, and are loaded when the mode is activated.

The table shows the default values for the four modes:

MODE 0Generic use

MODE 1LOW showcases

MODE 2MED showcases

MODE 3MED shelf cases

High temp. threshold

-15 °C -15 °C +10 °C -15 °C

Low temp. threshold

-40 °C -40 °C -2 °C -40 °C

HACCP delay 180 min. 120 min. 120 min. 120 min.Average weight 1

(Instant)16 (16 min.)

8 (8 min.)

12 (12 min.)

Tab. 3.f

EN_AUTO_CONF = Enables auto-confi guration mode (1= enabled);

EN_SCAFFALE = Selects the medium temperature shelf display case (1=shelf );The automatic recognition procedure is used to recognise the type of showcase and consequently confi gure the parameters for the showcase that the sensor is installed on. The automatic recognition cycle is activated (if enabled by EN_AUTO_CONF): - When the temperature falls below the threshold MODE_AUTO_TRESH;- When returning from CLEAN mode, closing the switch;- When a previous cycle is completed.

When the AUTO_DELAY time has elapsed, if the following conditions are true:- Final temperature rises less than 1°C/h;- Final temperature within a fi xed band of temperatures for the various types of showcase: • medium temp. showcases = from -2°C to + 6°C • low temp. showcases = less than -10°C.The MODE_PARAM parameter is given the new value corresponding to the type of showcase and the associated values for the alarm thresholds, alarm delay and average weight are loaded.Note:

In the event of increases in temperature for low temperature showcases, • the recognition procedure is disabled for 3 times the value of AUTO_DELAY, to avoid false recognitions.The temperature alarms are always enabled, if MODE_PARAM and • consequently the associated parameters are changed, the alarm logic depends on the new parameters.The parameters associated with each mode (0-3) are saved separately • and permanently, and are loaded automatically when the mode is changed.The values of the parameters associated with the mode must be set • (by the supervisor) making sure that MODE_PARAM does not change, otherwise the values transferred may be ignored.

3.3.4 High and low temperature alarm management parameters

Variable index


HR_02 HI_TEMP_TRESHOLD Threshold high Temp. (1/10°C) 20.0 -40.0 50.0 °C R/WHR_03 LO_TEMP_TRESHOLD Threshold low Temp. (1/10°C) -20.0 -40.0 50.0 °C R/WHR_04 HIGH_TEMP_DELAY Delay High Temp. Alarm 60 0 254 Min R/WCS_01 EN_HI_TEMP_ALM Enable High Temp. Alarm 1 0 1 - R/WIS_03 HI_TEMP_ALM_1 High Temperature Alarm 0 0 1 - RIS_04 LO_TEMP_ALM_1 Low Temperature Alarm 0 0 1 - R

Tab. 3.d

HI_TEMP_TRESHOLD = High temperature signal thresholds (in tenths of a degree °C);LO_TEMP_TRESHOLD = Low temperature signal threshold (in tenths of a degree °C); Signal not subject to delays;HIGH_TEMP_DELAY = Delay (waiting) time in minutes before the high temperature alarm is actually signalled. EN_HI_TEMP_ALM = Enables the high temperature alarm signal (if=1), otherwise the alarm is not measured/signalled. HI_TEMP_ALM_1 = Provides the status of the high temperature alarm;LO_TEMP_ALM_1 = Provides the status of the low temperature alarm.

Alarm delayHIGH_TEMP_DELAY


EN_HI_TEMP_ALM

LO_TEMP_ALM_1

HI_TEMP_ALM_1

Reset counter alarm

Start counter alarm delay

HI_TEMP_TRESHOLD

LO_TEMP_TRESHOLD

Tem

p. °C

TimeAlarm ON

Fig. 3.cThe fi gure illustrates the operation of the high temperature alarm: 1. when the threshold is exceeded, the alarm is signalled only if this persists for a time greater than the delay set; 2. if the temperature returns within the threshold before the delay time, the accumulated count is reset;3. the alarm is reset instantly when the temperature returns within the threshold

16

ENG


BP P

robe

3.3.6 Supervisor operating parametersVariable index


IR_00 MACHINE_CODE Unit type - code 63 - - - RIR_01 FW_VERSION Firmware version

(Major/Minor)- R

IR_04 ID_SER_ADDR Carel_ID Serial_Address DIP-SW value

- 16 127 - R

IR_09 MAC_ADDR_0 Units unique identifi er Mac-Address LSB

- - - - R

IR_10 MAC_ADDR_1 Units unique identifi er Mac-Address MSB

- - - - R

IR_13 TIME_STAMP Time stamp for Temp. readings

- 0 2359 hh:mm R

Tab. 3.gMACHINE_CODE = Peripheral identifi er for the supervisor (63 for BP sensor);

FW_VERSION = FW version for BP sensor (Initial value Rev. xxx);

ID_SER_ADDR = Sensor serial address, set using the commissioning tool. This can be used as a unit identifi er;

MAC_ADDR_0 and 1 = Unique 32 bit unit identifi er (1=MSB, 0=LSB). Used to uniquely identify each unit.

TIME_STAM P= expressed in hours:minutes associated with the last wireless data transmissions received. This can be used to synchronise the measurements from diff erent units with the same clock. Variable added by the Access Point for each sensor.

3.3.7 Wireless network control parametersVariable index


HR_10 MIN_RSSI_LEVEL Minimum rssi level counted

0 0 99 dBm+100 R/W

HR_11 CNT_REJOIN Max counter value before rejoin

30 0 255 - R/W

IR_02 TX_MESSAGE_CNT Total Number of TX radio messages

- - - - R

IR_03 RX_MSG_LEVEL Radio signal Level - 0 100 dBm+100 RIR_11 LAST_RX_DELAY Time from last AP

Rx message- 0 0 sec. R

IR_12 RX_MESSAGE_CNT Counter - AP Rx messages

- R

IR_14 AP_RX_RADIO_LEV Radio Lev. for AP Rx messages

- dBm+100 R

IR_15 NETWORK_ID Network ID - Unit to AP link

- R

IR_16 MIRROR_IS Internal use - Mirror Input Status

- - - - R

Tab. 3.hRX_MSG_LEVEL =Wireless signal level received for the sensor in dBm+100;

AP_RX_RADIO_LEV = Wireless signal level received from the Access Point for the sensor.

Note: the two values provide an indication of the wireless signal levels seen from the sensor and the Access Point. The minimum value must be greater than 8, for medium reception from 15 to 30, and excellent for values greater than 30.

MIN_RSSI_LEVEL, CNT_REJOIN, TX_MESSAGE_CNT, LAST_RX_DELAY, RX_MESSAGE_CNT, NETWORK_ID, MIRROR_IS = parameters for internal use to check the wireless network.

3.4 Technical specifi cationsPower supply SAFT LS 14500 3.6V 2500 mAh lithium

battery, "AA" size Maximum power input 100 mWBattery life in normal operating conditions

From 3 to 8 years, depending on the transmission time set. (CAREL is not responsible for the specifi ed battery life)

Radio frequency specifi cations Frequency: selectable from 2405 to 2480 MHz Power transmitted: 0dBmWireless protocol: ZigBee

Operating conditions -40T50°CStorage conditions -20T60°C

humidity range:

17

ENG


BP P

robe

3.6 Physical dimensions

7.527 83.9

71.6

34

SW1SW2

NTCLED4

450

3.7 Replacing the battery in the BP sensorThe case of the BP wireless sensor has been designed to provide high protection. When opening the two plastic shells to replace the battery, the locking catches may be damaged or break. Consequently, the spare battery is supplied together with a new case. Take maximum care when removing the electronic board from the old shell and placing it in the new one, so as to not damage the electronic components.

3.7.1 Rules for disposing of the batteryDo not dispose of the product as municipal waste; it must be disposed • of through specialist waste disposal centres.The product contains a battery that must be removed and separated • from the rest of the product.Improper use or incorrect disposal of the product may negative eff ects • on human health and on the environment.The public or private waste collection systems defi ned by local • legislation must be used for disposal.In the event of illegal disposal of electrical and electronic waste, the • penalties are specifi ed by local waste disposal legislation.

Fig. 3.e

18

ENG


EP P

robe

4. EP SENSOR (EXTERNAL SENSOR)The EP sensor is designed to be housed inside showcases or cold rooms, and can house two external passive NTC temperature sensors, NTC 10K@25°C and two digital inputs (door and defrost).

4.1 Functions implementedInstant temperature measurement performed every minute, sensor 1;• Instant temperature measurement performed every minute, sensor 2;• Data transmission at a settable interval in seconds, rounded off into • minutes (this aff ects battery life);Monitoring of temperature thresholds for high temperature (HACCP) • or low temperature (product freezing) alarm signals.

Main variables available to the supervisory system Temperature of sensor 1;• Temperature of sensor 2;• TimeStamp for recording the instant measurement, expressed in • hh:mm;Battery level in mV;• Wireless signal level in dBm +100 (10 = low signal, 30 = medium • signal);Temperature alarm status linked to the high and low thresholds.•

Main parameters can be set by the supervisory system Data transmission time;• Enable high temperature alarm;• High and low temperature alarm thresholds.•

4.2 Sensor confi gurationOpen the cover of the case and select the required network address using the 8 dipswitches (0=OFF; 1=ON) as shown in the table. Valid addresses for the sensors range from 16 to 127.

Fig. 4.a

Address Dipswitch Notes1 2 3 4 5 6 7 8

0..15 x x x x x x x x address not allowed (*)16 0 0 0 0 1 0 0 017 1 0 0 0 1 0 0 018 0 1 0 0 1 0 0 019 1 1 0 0 1 0 0 020 0 0 1 0 1 0 0 0

...127 0 1 1 1 1 1 1 1128,...199 1 1 1 0 0 0 1 1 address not allowed (*)200...256 x x x x x x x x address not allowed (*)

Tab. 4.a(*) The address can be selected but the device will not be able to be connected to the Access Point/Router-Bridge. Pressing the button will cause a series of rapid fl ashes of the LED to indicate an invalid address.

EXAMPLE: to set the address 117 for the sensor:Decimal value: 117• Conversion of the value to binary notation:(MSB) 0111 0101 (LSB)• Reverse the value of the string (10101110) and assign the dipswitches • from (LSB) 1 to 8. (MSB).

Dip-Switch1 2 3 4 5 6 7 81 0 1 0 1 1 1 0

4.3 Binding procedureBinding is a special procedure used to associate the sensors with the Access Point. Once completed, the sensors will send the temperature data measure wirelessly only to the Access Point defi ned as its parent. Following this, the Access Point will forward the data to the Modbus® RTU RS485 serial network.Before performing this operation, make sure that the sensor serial address has been set.After having opened the domain on the Access Point/Router-Bridge (see the instructions in the chapter on the Access Point), proceed as follows on the sensor:

Remove the protection from the contact on the battery to power up • the device;Check that the LED comes on for a few seconds;• Press the button once;• LED 2 on the sensor remains on until connection to the Access Point/• Router-Bridge is complete, then the three LEDs fl ash rapidly at the same time.

L1L2L3

Fig. 4.b

NOTE: if the LED fl ashes once instead of remaining on, it means that the sensor has already been associated with an Access Point/Router-Bridge. In this case, reset the sensor (see Resetting the sensor)

The Access Point/Router-Bridge shows the occurred connection with • the start-up sequential of the 3 LED.Check the confi guration: the sensor will be correctly associated if each • time the button is pressed the LED fl ashes once;Data transmission and reception is signalled by the two LEDs 1 and 2 • fl ashing briefl y.

IMPORTANT: the sensor binding operation may fail if:the distances are high and/or there is infrastructure that does not allow • communication between the devices (see the example of sensor S2 in Figure 4.c);the maximum limit of sensors allowed for the Access Point has been • reached (max 30). In this case, an additional Router-Bridge is required.

4.3.1 Resetting the sensor (disconnection)Remove and replace the battery;• Within 20 seconds, press the button for 10 seconds, until LED 2 • fl ashes;Release the button;• The LED fl ashes quickly and then goes off ;• The device is reset if when pressing the button again the LED remains • on for 15 s.

Note:The sensor can only be reset if it has already been associated with an 1. Access Point/Router-Bridge;Resetting the sensor does not delete the space reserved inside the 2. Access Point, which will continue to maintain the data saved inside. Note that, after resetting the sensor, the number of devices set for the Access Point remains unchanged. Realignment will occur after a maximum of around 2 hours.Important:3. pay careful attention to avoid duplicate assignment of network serial addresses, so as to avoid overlapping temperature values.

The sensor is supplied with the battery already fi tted, and with the positive pole insulated by a protective fi lm; this must be removed after assigning the network serial address.

ONOFF

19

ENG


EP P

robe

4.4 Description of parameters and functions

The EP wireless sensors read the temperature and manage the associated alarms at one minute intervals. The data is then transmitted at the intervals set by parameter, according to the application and the expected battery life. The sensors work most of the time in low power mode, so as to save battery power. Press the button to send the sensor data manually, or check the connection. The main parameters and functions of the sensor are:

4.5.1 Wireless network management and data transmission parameters:Variable index



- - - - R/W

CS_00 EN_CMD_PW Trig. PWD internal Use

0 0 1 - R/W

HR_01 TRANSM_CYCLE TX data cycle time (Sec)

60 60 3600 sec. R/W

Tab. 4.aCMD_PASSW_1 e EN_CMD_PW = only used by confi guration systems.

TRANSM_CYCLE = defi nes the wireless data transmission time to the Access Point. The value is set in seconds, but must correspond (rounded off ) to a multiple of 60, thus in minutes;

Note 1: to maximise battery life, set as few transmissions as possible;

Note 2: data transmission is activated automatically in the following situations:- change in status of the digital inputs, Door and Defrost;- eff ective high and low temperature alarms;- temperature sensor fault alarms;- pressing the button briefl y.

In all other cases, data transmission is defi ned by the set transmission cycle.

4.5.2 Temperature measurement and battery parametersVariable index


IR_07 TEMPERATURE_1 Temperature Value sensor 1 (units 1/10°C)

- -50.0 90.0 °C R

IR_08 TEMPERATURE_2 Temperature Value Sensor 2 (units 1/10°C)

- -50.0 90.0 °C R

HR_10 OFFS_TEMP_1 Off set Temperature 1 Measure

0 -9.9 9.9 °C R/W

HR_11 OFFS_TEMP_2 Off set Temperature 2 Measure

0 -9.9 9.9 °C R/W

IR_05 BATTERY_LEVEL Battery Level (mV) - 2600.0 4600 mV RIS_06 ALM_Sensor_1 Temperature

sensor 1 Alarm- 0 1 - R

IS_07 ALM_Sensor_2 Temperature sensor 2 Alarm

- 0 1 - R

IS_08 ALM_GENERAL General Unit Alarm - 0 1 - RIS_09 ALM_BATTERY Battery Alarm - 0 1 - R

Tab. 4.bTEMPERATURE_1 and 2 = Provide the temperature values measured by both sensors. The range of temperature readings is from -50°C to +90°C;

OFFS_TEMP_1 and 2 = Off set for calibrating the two measurements, within a maximum of ±9.9 C;

BATTERY_LEVEL = Battery voltage value (mV). The rated value is 3600 mV, below 2800 mV the battery is discharged.

Transmission time in min. Sensor battery life in years1 35 5

10 815 8

IMPORTANT: if the device does not communicate correctly with the Access Point (due to problems of distance or interference) the battery life may be reduced due to the continuous attempts to restore the connection to the Access Point/Router-Bridge.

ALM_Sensor_1 and 2 = Temperature measurement alarm. This may be caused by a value outside of the maximum range or by the sensors not connected correctly (open or short-circuited).

ALM_GENERAL = Provides a general fault signal for both sensors..

ALM_BATTERY = Provides the fl at battery signal (1 if < 2800 mV).

Access point

S1 S2

S3S4

RS485 Modbus RTU

30 m

30 m

®

Fig. 4.c

20

ENG


EP P

robe

4.5.3 High and low temperature alarm management parameters

Variable index


HR_02 HI_TEMP_TRESHOLD_1 Threshold high Temp. sensor 1 (1/10°C)

22.0 -50.0 50.0 °C R/W

HR_03 LO_TEMP_TRESHOLD_1 Threshold low Temp. sensor 1 (1/10°C)

-50.0 -50.0 50.0 °C R/W

HR_04 HI_TEMP_TRESHOLD_2 Threshold high Temp. sensor 2 (1/10°C)

22.0 -50.0 50.0 °C R/W

HR_05 LO_TEMP_TRESHOLD_2 Threshold low Temp. sensor 2 (1/10°C)

-50.0 -50.0 50.0 °C R/W

HR_06 HIGH_TEMP_DELAY Delay High temperature Alarm

1 1 254 Min R/W

CS_01 EN_HI_TEMP_ALM Enable High Temp. Alarm

1 0 1 - R/W

IS_00 HI_TEMP_ALM_1 High Temperature Alarm

- 0 1 - R

IS_01 LO_TEMP_ALM_1 High Temperature Alarm

- 0 1 - R

IS_02 HI_TEMP_ALM_2 High Temperature Alarm

- 0 1 - R

IS_03 LO_TEMP_ALM_2 Low Temperature Alarm

- 0 1 - R

Tab. 4.cHI_TEMP_TRESHOLD_1 and 2 = High temperature signal thresholds for both sensors (1 and 2). Can be set in tenths of a degree centigrade;

LO_TEMP_TRESHOLD_1 and 2 = Low temperature signal thresholds for both sensors (1 and 2). Can be set in tenths of °C. Signal not subject to delays;

HIGH_TEMP_DELAY = Delay (waiting) time in minutes before the high temperature alarm is actually signalled. Used for both sensors.

EN_HI_TEMP_ALM = Enables the high temperature alarm signal (if=1), otherwise the alarm is not measured/signalled. Used for both sensors.

HI_TEMP_ALM_1 and 2 = Provides the status of the high temperature alarm for both sensors (1 and 2);

LO_TEMP_ALM_1 = Provides the status of the low temperature alarm for both sensors (1 and 2);See Figure 4.d.

4.5.4 Digital input management parameters

Variable index

Name - Name Description Def. Min Max UoM Type R/W

CS_02 DOOR_POL Door digital input polarity

0 0 1 R/W

CS_03 DEFROST_POL Defrost digital input polarity

0 0 1 - R/W

IS_04 DEFROST_IN_STATUS Defrost input status (1 = open)

- 0 1 - R

IS_05 DOOR_IN_STATU Door input status (1 = open)

- 0 1 - R

IS_10 ALM_LONG_DEFROST Long Defrost Alarm

0 0 1 - R

HR_07 DEFROST_ALM_DELAY Delay long defrost Alarm

1 1 254 Min R/W

Tab. 4.DOOR_POL and DEFROST_POL = Defi ne the logical state of the input according to the status of the contact (open or closed), as shown in the following table:

Contact status Polarity DOOR input logical stateOPEN 1 Door CLOSEDCLOSED 1 Door openOPEN 0 Door openCLOSED 0 Door CLOSED

Contact status Polarity DEFROST input logical stateOPEN 1 Defrost NOT ActiveCLOSED 1 Defrost ActiveOPEN 0 Defrost ActiveCLOSED 0 Defrost NOT Active

DEFROST_IN_STATUS and DOOR_IN_STATUS = Provide the current logical state of the two digital inputs.0 = Door CLOSED 1 = Door open0 = Defrost NOT Active 1 = Defrost Active

ALM_LONG_DEFROST = Provides the alarm status for the Defrost input (1=Alarm);

DEFROST_ALM_DELAY = Delay time (waiting) in minutes before signalling the Defrost alarm;



EN_HI_TEMP_ALM

LO_TEMP_ALM_1

HI_TEMP_ALM_1

Reset counter alarm

Start counter alarm delay

HI_TEMP_TRESHOLD

LO_TEMP_TRESHOLD

Tem

p. °C

TimeAlarm ON

The fi gure illustrates the operation of the high temperature alarm: 1. when the threshold is exceeded, the alarm is signalled only if this persists for a time greater than the delay set; 2. if the temperature returns within the threshold before the delay, the count is reset;;3. the alarm is reset instantly when the temperature returns within the threshold.

Fig. 4.d

21

ENG


EP P

robe

4.5.5 Supervisor operating parameters:

Idx Name - Name Description Def. Min Max UoM Type R/W

IR_00 MACHINE_CODE Unit type - machine code

62 - - - R

IR_01 FW_VERSION Firmware version (Major/Minor)

6.24 R

IR_04 ID_SER_ADDR Carel_ID Serial_Address DIP-SW value

- 16 127 - R


- - - - R


- - - - R

IR_13 TIME_STAMP Time stamp for Temp. readings

- 0 2359 hh:mm R

MACHINE_CODE = Peripheral identifi er for the supervisor (62 for EP sensor);

FW_VERSION = FW version for BP sensor (Initial value Rev.6.24);

ID_SER_ADDR = Sensor serial address, set by dipswitch. This can be used as a unit identifi er;

MAC_ADDR_0 and 1 = Unique 32 bit unit identifi er (1=MSB, 0=LSB). Used to uniquely identify each unit.

TIME_STAMP = Value expressed in hours:minutes associated with the last wireless data transmissions received. This can be used to synchronise the measurements from diff erent units with the same clock. Variable added by the Access Point for each sensor.

4.5.6 Wireless network control parameters:

Idx Name - Name Description Def. Min Max UoM Type R/W

HR_08 MIN_RSSI_LEVEL Minimum rssi level counted

0 0 99 dBm+100 R/W

HR_09 CNT_REJOIN Max counter value before rejoin

30 0 255 R/W

IR_02 TX_MESSAGE_CNT Total Number of TX radio messages

- - - - R

IR_03 RX_MSG_LEVEL Radio signal Level - 0 100 dBm+100 RIR_06 TX_POWER Transmission power - 0 100 dBm+100 RIR_11 LAST_RX_DELAY Time from last AP

Rx message- - - sec. R

IR_12 RX_MESSAGE_CNT Counter - AP Rx messages

- - - - R

IR_14 AP_RX_RADIO_LEV Radio Lev. for AP Rx messages

- - - dBm+100 R

IR_15 NETWORK_ID Network ID - Unit to AP link

- - - - R

IR_16 MIRROR_IS Internal use - Mirror Input Status

- - - - R

Tab. 4.RX_MSG_LEVEL = Wireless signal level received for the sensor in dBm+100

AP_RX_RADIO_LEV = Wireless signal level received from the Access Point for the sensor. The two values provide an indication of the wireless signal levels seen from the sensor and the Access Point.

The minimum value must be greater than 8, for average reception from 15 to 30, and excellent for values greater than 30.

MIN_RSSI_LEVEL, CNT_REJOIN, TX_MESSAGE_CNT, TX_POWER, LAST_RX_DELAY, RX_MESSAGE_CNT, NETWORK_ID, MIRROR_IS = parameters for internal use to check the wireless network.

4.6 Technical specifi cations

Power supply SAFT LS 14500 3.6V 2500 mAh lithium battery, "AA" size

Maximum power input 100 mWBattery life in normal operating conditions

From 3 to 8 years, depending on the transmission time set. (CAREL is not responsible for the specifi ed battery life)

Radio frequency specifi cations Frequency: selectable from 2405 to 2480 MHzPower transmitted: 0dBmWireless protocol: ZigBee

Operating conditions -40T50°C,

22

ENG


EP P

robe

4.8 Physical dimensions

94

102

40

108

50

70

fori di fissaggiomounting holey

Fig. 4.e

4.9 Electrical connections

DI Defrost

DI Door

NTC1

NTC2

Fig. 4.f

1. NTC sensor input 1 type 10K@25°C (e.g. NTC*HP* or NTC*WP*);2. NTC sensor input 2 type 10K@25° C (e.g. NTC*HP* or NTC*WP*);3. Defrost digital input (can be confi gured as N.C. or N.O);4. Door digital input (can be confi gured as N.C. or N.O);The maximum length of the cable for the NTC sensors and digital inputs is 10m.

4.10 Application example

4.11 General warningsFor the replacing the battery, strictly observe the following • instructions.The battery may explode if replaced with another of an incorrect type. • Dispose of the used batteries according to the standards in force;Install the sensor with the cable gland facing downwards;•

4.12.1 Replacing the batteryRemove the cover by unscrewing the 4 screws, remove the battery, and replace with another of the same type. Close the cover again by tightening the 4 screws.

4.12.2 Rules for disposing of the batteryDo not dispose of the product as municipal waste; it must be disposed • of through specialist waste disposal centres.The product contains a battery that must be removed and separated • from the rest of the product.Improper use or incorrect disposal of the product may negative eff ects • on human health and on the environment.The public or private waste collection systems defi ned by local • legislation must be used for disposal.In the event of illegal disposal of electrical and electronic waste, the • penalties are specifi ed by local waste disposal legislation.

Fig. 4.g

23

ENG


Acce

ss p

oint

5. ACCESS POINTThis is the coordinator of a wireless network as well as the gateway for the information between the ZigBee™ protocol and the CAREL supervisor side (pCO, PlantVisor, PlantWatch or any CAREL master device). Up to 7 Access Points can be connected to the same fi eld serial port.

5.1 Main functionsManual opening/closing of the wireless domain (button) or via software • for connecting the devices (sensors or Router-Bridges);count the number of sensors connected;• automatic selection of the channel wireless to be used.•

5.1.1 Table of LED statusFunction Description RemarksReset Press the button until L1,

L2, L3 come on together, then fl ash quickly

Operation valid only if the sensor is already associated and if performed within 20 sec. from start-up

Binding to Access Point /Router-Bridge

Pressing the button once; L2 remains on for around 10 sec, then L1, L2, L3 come on together

The LED goes off even if the sensor has not been correctly connected

Check connection / Data transmission

Pressing the button once, on the sensor; L1, L2 fl ash briefl y once in sequence

Operation valid only if only if the sensor is correctly associated with the Access Point/Router-Bridge

Tab. 5.a

5.2 Parameters and functions The Access Point manages the wireless network and the wireless connection of all the units, making these accessible to the supervisory system via the Modbus® RS485 serial connection. For all the sensors managed directly, it stores a copy of all the parameters and variables, which are updated every time data is transmitted via the wireless connection.The Access Point makes the data for all the peripherals available to the supervisor at all times, even if wireless transmission is performed at set intervals.

The main parameters that defi ne the operation of an Access Point are:

5.2.1 Wireless network management parametersVariable index



- - - - R/W


- - - - R/W


- - - - R/W

CS_00 EN_CMD_PW Enable Command Password - internal use

0 0 1 - R/W

IS_00 AP_CONN AccessPoint connected to Radio Network (1=Yes)

0 0 1 - R

IS_01 AP_OPEN AccessPoint Network Open/Closed (1= open)

0 0 1 - R

Tab. 5.bCMD_PASSW_1, 2, 3 and EN_CMD_PW = used to run wireless network confi guration commands; used by installation and confi guration tools;

AP_CONN = indicates whether the Access Point is managing the wireless network (1 = yes);

AP_OPEN = indicates whether the peripheral wireless network binding procedure is in progress (1=yes).

5.2.2 Supervisor operating parameters:Variable index


HR_03 OFFLINE_MODE Mode_Status Access-Point (1= no answer if Offl ine)

5 0 7 - R/W

HR_04 TIME_STAMP Clock Counter hh:mm for RX-data TimeStamp

0.00 0.00 23.59 hh:mm R/W

IR_00 MACHINE_CODE Unit type - machine code

112 - - - R

IR_01 FW_VERSION Firmware version (Major/Minor)

6.24 R

IR_08 ID_SER_ADDR ID Carel, Serial Address, DIP-SW value

1 7 R


- - - - R


- - - - R

Tab. 5.cOFFLINE_MODE = Access Point response mode for Offl ine units.

0 0 0 03 2 1 0

= HR_03

Don’t use =0

Router-Bridge: 1=disenable2=enable

Don’t use =0

OFFLINE MODE 0= response always1= no-response if in OFFLINE

1 = Router-Bridge enable+ OFFLINE5 = Router-Bridge disenable + OFFLINE

0 * 0 *

Note: a peripheral is considered Offl ine by the Access Point after 4 query cycles, that is, after a time equal to 4 x TRANSM_CYCLE. This must be left at 1 (default) for systems that consider non-response as Offl ine.

TIME_STAMP = Clock in hours:minutes used to save the measurement and data transmission times for the sensors. This is updated/incremented every minute by the Access Point, and can be set from the supervisor to align it with a real clock. Inadmissible are rounded off to the nearest (hour: minutes). The value is lost in the event of power failures, and restarts from 00:00. To synchronise the clock, the supervisor must reset the value.

MACHINE_CODE = Peripheral identifi er for the supervisor (112 per Access Point).

FW_VERSION = FW version for Access Point (Initial value Rev.6.24).

ID_SER_ADDR = Value serial address, set by dipswitch. This can be used as a unit identifi er.

MAC_ADDR_0 and 1 = Unique 32 bit unit identifi er (1 = MSB, 0 = LSB). Used to uniquely identify each unit.

24

ENG


Acce

ss p

oint

Access point

S1 S2

S3 S4

Seriale RS485 Modbus RTU

30 m

30 m

®

5.2.3 Wireless network control parametersVariable index


IR_02 AP_TX_RADIO_LEV AccessPoint Trasmission Power

-1 0 100 dBm +100

R

IR_03 NET_CHANNEL Network Channel - ZigBee

- 11 26 - R

IR_04 NET_PANID Network PanId - 0 32767 - RIR_05 RES_COUNTER Counter - Seconds from

last Reset- - - - R

IR_06 RX_MESSAGE_CNT Counter - Rx messages from last Reset

- - - - R

IR_07 CONNECTED_UNIT Number of Connected units (On-line units) End-Devices

- - - - R

IR_11 RX_MSG_LEVEL Radio signal Level 0 100 dBm+100

R

IR_12 CONN_BINDED Number of Units with Router-Bridge connected

- 0 254 R

IR_13 CONN_AP Number of units connected to AccessPoint

- 0 30 R

IR_14 AP_RESET_CNT Counter - Reset number for AccessPoint

R

IR_15 AP_RESET_TYPE Type for AccessPoint Reset

R

IR_16 FREE_BUFFER Free Packet-Buff er (available connection slot)

R

Tab. 5.dAP_TX_RADIO_LEV and RX_MSG_LEVEL = indicate the wireless transmission and reception levels for the Access Point in dBm +100. For reception the minimum value must be greater than 8, for medium reception from 15 to 30, and good for values greater than 30;

NET_CHANNEL and NET_PANID = ZigBee transmission channel and network identifi er. These uniquely defi ne the wireless network used by the system to communicate (Access Point, Repeaters, Sensors). The values are set in the confi guration procedure or by the commissioning tool;

CONNECTED_UNIT = Total number of sensors connected to the wireless network and managed by the Access Point;

CONN_BINDED = Total number of units visible in the network by the remote wired network bridge (see the Bridge);

CONN_AP = Number of units connected directly to the Access Point;

RES_COUNTER, RX_MSG_LEVEL, AP_RESET_CNT, AP_RESET_TYPE,FREE_BUFFER = parameters for internal use to check the wireless network.

Note: the parameters described are divided into 4 groups, based on the Modbus® standard: HR_xx Read/write registers (32 bit words) IR_xx Read-only registers (32 bit words) CS_xx Read / write bit (1 bit) IS_xx Read-only bits (1 bit)

The parameters indicated as: “Confi guration” or “Check NETWORK” are not normally used in the supervision application. Rather they are used by the confi guration systems (commissioning tools).

5.3 Confi guration The following chapter describes the procedure for setting the address, confi guration and connection of the devices, so as to create a wireless domain that is connectable to a controller via the Modbus® RTU protocol (see Figure 5.a). A fundamental step is commissioning, which involves the unique identifi cation of each device by:• Assigning a unique network address to each device;• Binding of the devices to a domain so that the devices can communicate with each other. All the other devices cannot communicate even if they are reached by the wireless signal.Security of communication is guaranteed by the ZigBee protocol, which uses a unique identifi er (Mac-Address) for confi guration and enabling within the domain during the binding procedure. The variable is available to the monitoring system with read-only access.In normal operation, only the serial address is used, which is also unique within the network and is suffi cient to identify each unit. WARNING! Two units cannot have the same serial address. Therefore pay careful attention when assigning the network addresses to the sensors and Access Points so that there are no devices with the same serial address, also considering any instruments connected to the remote wired network. This would create confl icts and interference in the storing of temperature data. Consequently, it is recommended to connect just one Access Point to each RS485 serial line, so as to limit the possibility of address assignment errors.

5.4 Setting the addressThis is a fundamental phase in setting up the system, and allows each device to be identifi ed uniquely by assigning a unique network address to each device (Modbus® network address).

5.4.1 Access pointPower up the Access Point;• Check that the LED 1 is always on and the others are off . If the LEDs are • not in this status, reset the Access Point (see Resetting the devices).

L1 L2 L3

Assign the CAREL network address and communication speed using • the 4 dipswitches as shown in Table 5.e.

Fig. 5.a

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Acce

ss p

oint

DIP: 1 2 3 4 + + G- -

Rx- Rx+ GNDL1 L2 L3

T1

DIP 1-2-3 set net address

DIP 4 set baud net

Important: the address can be changed after switching off /on.

DIP 1-2-3 Serial addressDip 4 Baud rate (Bit/S)

Dipswitch0=off 1=on

Notes

Baud rate 9600Address

Baud rate 19200Address

1 2 3 4

0 0 0 0 0 reserved, do not use

1 1 0 0 02 0 1 0 03 1 1 0 04 0 0 1 05 1 0 1 06 0 1 1 07 1 1 1 0

0 0 0 0 1 reserved, do not use

1 1 0 0 12 0 1 0 13 1 1 0 14 0 0 1 15 1 0 1 16 0 1 1 17 1 1 1 1

Tab. 5.e

5.4.2 Creating the network and selecting the wireless communication channelThe wireless system requires of use a transmission channel for the communication of the wireless messages between the various devices. The best communication channel for the environment in question is automatically selected by the Access Point, using the following procedure:

• Power up the Access Point (LED 1 must be on steady);

L1 L2 L3

• Press the button and check the activation sequence:

L1 L2 L3

For around 10 seconds: LED 1 and 2 on (pause)

L1 L2 L3

For around 20 seconds: LED 2 on (search for ZigBee channel)

L1 L2 L3

LED 2 Flashing

The Access Point is ready for use, the wireless network has been initialised.The transmission channel has been selected and will be sent to the Router-Bridges and sensors during the binding phase.

Important:1. if the sequence does not occur as indicated, reset the device (see Resetting the device);2. if the instrument is reset, all the instruments associated with it will be disconnected and will need to be connected again.The commissioning tool can be used to choose the network directly, and consequently the above procedure may not be necessary.

5.5 Binding procedureThe logical connection between the Access Point and the wireless sensors/Router-Bridges is called binding. This operation must be performed after setting the addresses and selecting the communication channel.• Power up the Access Point and check that LED 2 is fl ashing.

L1 L2 L3

(In the diagram LED 2 is fl ashing).

• OPEN DOMAIN: press the button and the 3 LEDs fl ash together.

L1 L2 L3

In this phase, new devices can be connected.• CLOSE DOMAIN:• After having connected all the devices, press the button to close the domain (LED 2 starts fl ashing again).

L1 L2 L3

NOTE:The domain closes automatically 15 minutes after last opening.The same procedure is valid on the Router-Bridge when other routers/sensors need to be connected.The domain can be opened/closed on the Access Point from the supervisor, using the following procedure, checking the status using parameter IS_00, IS_01:

Modbus® varia-ble indices

• OPEN DOMAIN: Selectenable procedure

→→

HR_00=5266CS_00 = 1

• CLOSE DOMAIN: Selectenable procedure

→→

HR_00=5267CS_00 = 1

• Network domain status:

Network open, Binding activeNetwork closed

→→

IS_01 = 1IS_01 = 0

• Access Point with Network Active:

Network initialisedNetwork NOT initialised

→→

IS_00 = 1IS_00 = 0

Tab. 5.f

5.6 Resetting the deviceTo reset the devices to the initial purchase status, proceed as follows.

5.6.1 Access PointTurn the Access Point off and on again, and perform the next step • within 20 secondsPress the button until the 3 LEDs remain on steady (not fl ashing);•

L1 L2 L3

Release the button;• The LEDs will start fl ashing quickly;• The device is reset if after a few seconds LED 1 remains on steady;•

L1 L2 L3

Note: all the devices previously associated will be removed from the Access Point/Router-Bridge (no devices connected=0).

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Acce

ss p

oint


Power supply 24 V ±10 % (class 2 from distribution line)24 V ±10 % -15 % 2 VA (class 2 safety transformer12 to 24 Vac ±10 % from revision 2.626

Maximum power input 1 VARadio frequency specifi cations Frequency: selectable from 2405

to 2480 MHz (by parameter or automatically, see the table of supervisor parameters)Power transmitted: 0dBmWireless protocol: ZigBee

RS485 transmission speed 19200 Kb/sMax. num. of instruments that can be associated

30 sensors; 8 repeaters (60 adding a Router-Bridge)


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Rout

er-B

ridge

Access point

S1 S2

S3 S4

30 m

30 m

Router-Bridge

Seriale RS485 Modbus RTU®

6. ROUTER-BRIDGEDevice that repeats the wireless signals so as to cover greater distances between the Access Point and the sensors. As soon as it detects a wireless signal recognised by the network, it relays it. In addition, it can be used to expand the number of sensors connected to the Access Point when these exceed 30 units, or if the distance is greater than 30 m. Finally, the device can also connect to a local wired network via RS485.

6.1 Parameters and functions There are no parameters and functions for this device.

6.2 Associating the Router-Bridge to the Access Point

Power up the Router-Bridge.• Open the domain on the Access Point (press the button once).• The button on the Router-Bridge does not need to be pressed, if free • the procedure is activated automatically.All the LEDs come on steady. • The Router-Bridge searches for an Access Point to connect to (all the • LEDs fl ash every 20s).Binding is successfully completed when only LED 2 remains on • fl ashing.The Router-Bridge is now connected to the Access Point.•

NOTE: the binding operation on the Router-Bridge may fail if;the distances are large;• there is infrastructure that prevents communication between the • devices.

6.2.1 Example of binding sensor S2 to the system:OPEN DOMAIN: press the button on the Access Point and the 3 LEDs • fl ash together.

L1 L2 L3

Wait 20s for the Router-Bridge or Router-Bridges installed to receive • the open domain message (all the LEDs fl ash).In this phase new devices can be connected;• Complete the sensor binding procedure,•

CLOSE DOMAIN: After having connected all the devices, press the • button to close the domain (LED 2 starts fl ash again).

L1 L2 L3

NOTE: The domain closes automatically 15 minutes after last opening.• No address needs to be set on the Router-Bridge;•

(see Fig. 6.a)

Commissioning is complete and the system is ready for data communication.

NOTE: each sensor installed should be visible to at least 2 devices, either Access Point or Router-Bridge. In the event of faults on the Router-Bridge, the sensor will fi nd an alternative route to communicate with the Access Point.

6.3 Resetting the deviceTo reset the device, proceed as follows.

6.3.1 Router-BridgeTurn the device off and on again, and perform the next step within 20 • secondsPress the button until the 3 LEDs remain on steady (not fl ashing);•

L1 L2 L3

Release the button;• The LEDs will start fl ashing quickly;• The device is reset if after a few seconds LED 2 remains on steady;•

L1 L2 L3

Note: all the devices previously associated will be removed from the Access Point/Router-Bridge (no devices connected=0).This operation can also be performed via a serial connection.

Fig. 6.a

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Rout

er-B

ridge


Power supply 24V ±10% (class 2 from distribution line)24V ±10% -15% 2VA (class 2 safety transformer12 to 24 Vac ±10 % from revision 2.626

Maximum power input 1 VARadio frequency specifi cations Frequency: selectable from 2405

to 2480 MHz (by parameter or automatically, see the table of supervisor parameters)Power transmitted: 0dBmWireless protocol: ZigBee


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ENG


7. GENERAL NOTES

7.1 Notes for correct installationTo ensure correct operation of the ZigBee wireless system, the best possible connection must be guarantees between the Access Point and the Router-Bridge.

The Router-Bridge should preferably be installed at a height of around • 30/40 cm from the ceiling, not in contact with large metallic objects (air ducting etc.), so as to avoid the Router-Bridge-Access Point connection being aff ected by obstacles such as cabinets, showcases, moving people, and where possible in direct line of sight with the other Router-Bridges.Make sure that the path between the Router-Bridge and the Access • Point does not include metallic fi re doors or large metallic obstacles (elevator compartment etc.) which may disturb the connection. When positioning the devices, check that the sensors have at least two • wireless routes to the Access Point; that is, they can be seen by at least two Router-Bridges or one Router and the Access Point, and that the wireless signal levels, both in and out, are higher than 20 in the event of fi xed networks, and 30 in the event of mobile networks (e.g.: movable showcases). Fasten the Access Point/Router-Bridge in position, considering that as • the device being installed is a radio device, the following simple rules must be observed:The effi ciency of radio transmission is reduced when there are • obstacles, metal shelving or other objects that may block the reception of the wireless signals;If the product is wall-mounted, fasten it to a masonry wall rather than • a metal wall, to improve the range of the signal;Like all radio equipment, avoid installing the Access Point near other • electronic appliances, so as to avoid interference;Connect the RS485 network to the terminal respecting the polarity. • For correct operation the system must be powered at all times, in the • event of power failures there may be a unit reset time (OFF-LINE) based on the data transmission cycle.

- Do not install the instruments in environments with the following characteristics:

strong vibrations or knocks; • exposure to water sprays; • exposure to direct sunlight or the elements in general; • If the devices are used in a way that is not described by the manufacturer, • the specifi ed level of protection may be aff ected.

7.2 Power supply connectionTo Access Point and Router-Bridge can be powered using the 230/24 Vac transformer, CAREL code 09C515A010, or the 230/12Vac transformer code 09C425A003 (removing the terminal connector).The maximum cable size for the terminals is 1.5 mm2.

7.3 WiringTo wire the serial connection to the Access Point, use 3-wire shielded cable. To ensure IP55 protection on the case, use a 5-wire cable, and relay the serial and power supply connections through an external junction box with terminal block.The maximum cable size for the terminals is 1.5 mm2. The maximum outside diameter of the cable must not exceed 8 mm, to allow it to pass through the cable gland.

Features of the serial connection cableFor connection to the Access Point, the cable used must have the following characteristics:

Twisted pair;• Shielded, preferably with earth wire;• Size AWG20 (diam. 0.7-0.8 mm; area 0.39-0.5 mm2);• Rated capacitance between the wires

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8. GENERAL INSTALLATION NOTESBefore installing, the following procedures should be completed:

1. On the installation drawings, defi ne the points of measurement where the sensors will be positioned, listing these with progressive numbering. Create a table such as the one shown in the example below.

Type of device

Serial address

Case name

NTC sensor 1 NTC sensor 2 I.D. 1

I.D. 2

Access Point 1 / / / / /BP sensor 1 21 Dairy 1 / / / /BP sensor 2 22 Dairy 2 / / / /

EP sensor 1 23 L.T. 1 Evaporator 1 Condenser 1 / /EP sensor 2 24 L.T. 1 Evaporator 2 Condenser 2 / /

Tab. 8.a

Associate the type of device and serial address with the showcase.• For the EP sensor, associate outputs NTC1, NTC2, ID1, ID2 with the • name of the showcase these will be installed on (if placed on two diff erent showcases);Keep and update the table and the layout drawing for reference in the • event of changes.

Perform the confi guration by binding the sensors to the Access Point on a workbench, and make sure that the entire system is correctly confi gured, with all the sensors visible to the supervisor.

Procedure for BP sensor (Built-in Sensor)

To Sequence of operations

Notes Note

1 Access PointCa-rel code WS00AB2M20

Select a network address from 1 to 7 (dipswitch 1-2-3) 1 100*2 010*3 110*4 001*5 101*6 011*7 111*and baud rate (dipswitch 4)0=9600 Bit/s1=19200Bit/s

2 Power up at 24 Vac, using a 230 Vac/24 Vac transformer Carel code 09C515A010

3 BP sensor-Carel code WS00U01M00

Assign a network address with the “Carel rTM MANAGER” programSee procedure in the commissio-ning tool manual

4 Access Point Select the wireless channel by pressing the button. Open the wireless channel

5 Sensor Activate magnetic switch SW16 Access Point Close the wireless channel with the

buttonTab. 8.b

For EP sensor (External sensor)

Action To Sequence of operations Notes1 Access

PointCa-rel code WS00AB2M20

Select a network address from 1 to 7 (dipswitch 1-2-3) 1 100*2 010*3 110*4 001*5 101*6 011*7 111*and baud rate (dipswitch 4)0=9600 Bit/s1=19200Bit/s

2 Power up at 24 Vac, using a 230 Vac/24 Vac transformer Carel code 09C515A010

3 EP sensor-Carel code WS00W02M00

Assign a network address on the dipswitches, from 16 to 126.Example16 0000100017 1000100018 0100100019 1100100020 00101000….

4 Remove the insulating protection from the battery. Check that the LED comes on for a few seconds.

5 Access Point Make sure that LED L1 (yellow) is on.This condition occurs when the device is new or has been reset.

Press button T1 once, and check that LED L2 comes on (green). The Access Point is searching for the network and the communication channel).

Wait until LED L2 fl ashes.

6 Press the button.L2 remains on for around 10s,then L1 2 3 come on together.

For confi rmation of binding to the Access Point, press the button on the sensor, and LED L1 and L2 will come turn on for a few seconds, fl ashing briefl y once in sequence.

7 Perform the same operations, for all the sensors to be assigned to the Access Point

8 Access Point After having assigned all the devices to the network, press T1 again, and LED L2 will start fl ashing again, clo-sing the sensor binding operation.

9 Access Point+Sensors

Number the devices with a label on the product that shows the serial address assigned, and remember to also note this on the installation layout drawing.

10 Supervisor From the supervisor, check that the system is confi gured correctly, with all the sensors connected.

Wait the sensor transmis-sion interval to see the tempera-ture value displayed.

Tab. 8.c

The system can also be confi gured performing the same operations using the “Carel rTM MANAGER” commissioning tool.Proceed with the installation and positioning of the devices in the fi eld.

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2. Defi ne the installation position of the Access Point and Router-Bridge to correctly cover the area of installation, and connect the power supply. WARNING! Make sure the power supply is connected 24 hours a day.

3. The Access Point and Router-Bridge must be powered at 24 Vac, if necessary with a 230 Vac plug-in transformer.

4. Connect the Access Point to the RS485 serial connection as near as possible to the supervisor, and with free wireless access to the installation area of the sensors and Router-Bridges.

5. Defi ne the position of the sensors on the showcases, following the rules to ensure a good wireless signal available (the sensors and Access Point/Router-Bridge must be in line of sight, with no obstacles or barriers in between. The maximum distance must not be exceeded).

6. For the EP sensors, position the case with the cable gland facing downwards, connect the sensor cables, select the serial address, remove the insulation on the positive pole of the battery.

7. Perform the binding procedure to the Access Point.

8. Check that the LEDs fl ash whenever the button is pressed briefl y (magnetic switch for the BP version) indicating data transmission/reception.

9. From the supervisor, check that the system is confi gured correctly, with all the sensors connected, checking in particular: a. on the Access Point the number of units connected must correspond to the total number of sensors installed; b. Check that all the sensors are On-Line, if some are not, try stimulating them to check that data transmission occurs, indicated by the LEDs fl ashing. Check that there are no duplicate serial addresses.

IMPORTANT:Position the Access Point so that it can see the highest possible • number of sensors, possibly at a height and away from obstacles, so that the path between the sensors and the Router-Bridge cannot be easily blocked.

Add the Router-Bridges to cover the peripheral areas with a lower concentration of sensors installed, according to the same criteria as the Access Point.

Cover the area with the Access Point and Router-Bridges so that the • sensors are visible to two or more devices.Warning:• the maximum number of sensors connected in the installation should be:

- up to 15 with one Access Point and one Router-Bridge; - up to 30 with one Acces

Documents

Wireless sensors - ARClim · 2014. 6. 23. · 3 ENG “Wireless Probes” +030220666 - rel. 1.0 - 16.09.2008 WARNINGS CAREL bases the development of its products on decades of experience