878 Panel Indicator - Honeywell · Introduction Instruction manual ... • high and low level alarms Figure 1.1 878 panel indicator ... As soon as the water level is detected,

Instruction manual878 Panel Indicator

Instruction manual 878 Panel Indicator Page 1

Instruction manual 878 panel indicator

(software version > A1.3)

October 2013

Part no. 4416.263

Revision 3

Enraf B.V. P.O. Box 812 2600 AV Delft Netherlands Tel. : +31 15 2701100 Fax : +31 15 2701111 E-mail : [email protected] Website : http://www.honeywellenraf.com

Page 2 Instruction manual 878 Panel Indicator

Copyright 1993 - 2013 Enraf B.V. All rights reserved.

Reproduction in any form without the prior consent of Enraf B.V. is not allowed. This manual is for information

only. The contents, descriptions and specifications are subject to change without notice. Enraf B.V. accepts no

responsibility for any errors that may appear in this manual.

The warranty terms and conditions applicable in the country of purchase in respect to Enraf B.V. products are

available from your supplier. Please retain them with your proof of purchase.

Preface


Preface

This manual is intended for technicians involved with the installation, commissioning and service of the

Honeywell Enraf Series 878 panel indicator

For mechanical and electrical installation of the 878 panel indicator, refer to section 3 and 4.

A description preceding the technical procedures gives the technical information necessary to understand its

functioning. It is recommended to read this description prior to performing any of the procedures.

Safety and prevention of damage

Safe execution of the procedures in this manual requires technical experience in handling tools, and knowledge

of safety regulations in handling electrical installation in hazardous environments.

"Warnings", "Cautions", and "Notes" have been used throughout this manual to bring special matters to the

immediate attention of the reader.

• A Warning concerns danger to the safety of the technician or user;

• A Caution draws attention to an action which may damage the equipment;

• A Note points out a statement deserving more emphasis than the general text, but does not deserve a

"Warning" or a "Caution".

The sequence of steps in a procedure may also be important from the point of view of personal safety and

prevention of damage; it is therefore advised not to change the sequence of procedural steps or alter a

procedure.

Legal aspects

The information in this manual is copyright property of Enraf B.V., Netherlands.

Enraf B.V. disclaims any responsibility for personal injury or damage to equipment caused by:

• Deviation from any of the prescribed procedures;

• Execution of activities that are not prescribed;

• Negligence of the general safety precautions for handling tools, use of electricity and microwave radiation.

EC declaration of conformity

This instrument is in conformity with the protection requirements of EC Council Directive 89/336/EEC.

The CE conformity marking fulfils the provisions of

EN 50081-2 Generic Emission Standard

EN 50082-2 Generic Immunity Standard

when installed, maintained and applied according to requirements as specified in this manual.

For delivery within EC only.

Additional information

Please do not hesitate to contact Honeywell Enraf or its representative if you require additional information.

Table of contents


Table of contents

Preface ................................................................................................................................................... 3

1 Introduction 5

1.1 General information ............................................................................................................................. 5

1.2 Principle of operation ........................................................................................................................... 5

1.3 Functionality ......................................................................................................................................... 5

1.3.1 Level (temperature) window ....................................................................................................... 6

1.3.2 Water interface window .............................................................................................................. 6

1.3.3 Density windows ......................................................................................................................... 6

1.4 Operational modes ............................................................................................................................... 7

1.5 Data accuracy and integrity .................................................................................................................. 7

2 Storage and unpacking .................................................................................................................................. 8

2.1 Storage ................................................................................................................................................ 8

2.2 Unpacking and inspection .................................................................................................................... 8

3 Mechanical installation ................................................................................................................................... 9

3.1 Preparation of the panel indicator ........................................................................................................ 9

3.2 Mounting a new indicator ..................................................................................................................... 9

3.3 Removing an old indicator .................................................................................................................... 9

4 Electrical installation ..................................................................................................................................... 10

4.1 Rear panel cabling ............................................................................................................................. 10

4.2 Preparation of the instrument ............................................................................................................. 10

4.3 Changing the mains voltage ............................................................................................................... 10

4.4 Electrical connections ........................................................................................................................ 11

5 Software 12

5.1 Updating the software ........................................................................................................................ 12

5.2 Initializing ........................................................................................................................................... 12

6 Commissioning ............................................................................................................................................. 13

6.1 Mechanical and electrical installation ................................................................................................. 13

7 Display & configuration ................................................................................................................................ 14

7.1 Display ............................................................................................................................................... 14

7.2 Display contrast ................................................................................................................................. 14

7.3 The keyboard ..................................................................................................................................... 14

7.4 Indicator LEDs ................................................................................................................................... 15

7.5 Jumper protection ..................................................................................................................... 15

7.6 Selection of the menus ...................................................................................................................... 15

7.7 Table of menu settings ....................................................................................................................... 16

7.8 Menus ................................................................................................................................................ 17

Appendix A Dimensional drawing ................................................................................................................ 21

Appendix B Specifications ........................................................................................................................... 22

Appendix C Window selection ..................................................................................................................... 24

Appendix D Service functions ...................................................................................................................... 29

Appendix E Error display screen ................................................................................................................. 30

Appendix F Recommended spare parts ...................................................................................................... 31

Appendix G Host communication ................................................................................................................. 32

Appendix H ASCII table ............................................................................................................................... 35

Index ................................................................................................................................................. 36

Introduction


1 Introduction

1.1 General information

The 878 panel indicator is the latest addition to the range

of Honeywell Enraf indicators. This indicator provides

remote indication for radar, servo and hydrostatic tank

gauging instruments via the Honeywell Enraf fieldbus,

using the GPU protocol.

The 878 displays a complete set of tank data such as:

• product level

• product interface level

• temperature

• density (servo or observed)

• gauge address

• high and low level alarms

Figure 1.1 878 panel indicator

and operational status information on its clear back lighted

4 x 20 characters liquid crystal display.

Configuration of the various functions is easily done via the keys on the front panel and a display menu.

The indicator can be optionally equipped with two alarm output relay contacts controlled by the gauge's high and

low level programmable alarms.

This indicator is developed for indoor use. Flexible interchanging with the older indicator series (like 856, 826) is

possible while the panel cut-out is matching that of the older instruments, although the connection has to be

changed. The instrument has an IP20 protection (only for indoor use).

1.2 Principle of operation

A microprocessor converts the received GPU-protocol messages into a form suited for the display and adds the

selected dimensions. Dimensions and other display parameters are pre-programmed. They can be changed by

entering the setup menu. All settings are stored in NOVRAM (non-volatile memory). To prevent unintentional

changes of NOVRAM settings, these settings can be protected by means of jumpers in the instrument.

1.3 Functionality

A row of four soft-keys on the front panel enables the user to transmit various commands to the field instrument

connected to the 878 panel indicator. The commands to be given depend on the selected display window.

Introduction


1.3.1 Level (temperature) window

For the level (temperature) window these commands are test, lock, unlock and block.

These commands are only applicable for servo gauges.

Test The Test command raises the displacer for a few seconds, after which it returns to the liquid

surface. The test command performs a repeatability test of the level measurement.

Lock After a Lock test command the displacer is raised until the motor high limit switch is

reached. This command can be cancelled by an Unlock.

Unlock The Unlock command is used to break off any operational command.

Block The Block command stops the displacer.

1.3.2 Water interface window

There are two different commands to start a water interface measurement.

• Initiating a water measurement (W_M) command causes the 878 panel indicator to monitor the displacer

position. As soon as the water level is detected, the displacer will stop at the interface layer and the

measured level value will be displayed. An unlock command must be issued to raise the displacer to the

product level.

• In case of an interface dip (W_D) command the indicator operates identical to the interface measurement

command with the exception, that when the interface level is detected, the displacer automatically returns

to the product level.

In both cases the interface level will be stored and displayed on the water window.

1.3.3 Density windows

Density can be measured and displayed in two different ways.

• A density dip (D_D) command can be issued to the 854 to start a Tank Profile (TP) density measurement

at 10 level positions equally divided over the product level. From the 10 measured values the 854

calculates the average density. This average density is displayed in the servo density window. In order to

economize operations of the 854 ATG, a combined water and density dip (C_D) can be initiated. In this

case first the interface measurement will be performed followed by the average density measurement.

• In addition to the above mentioned method observed density can be retrieved by means of two different

measuring systems. These are based on HIMS and HTG.

A HIMS system measures with either a radar gauge or a servo gauge the liquid level height.

A pressure transmitter at the bottom of the tank measures the hydrostatic pressure. From the level and the

hydrostatic pressure the observed density is calculated.

A HTG system makes use of two pressure transmitters to calculate the observed density.

The observed density measured via a HIMS or HTG system is displayed in the observed density window.

Introduction


1.4 Operational modes

Three operational modes can be chosen:

• stand alone When used in this mode the 878 panel indicator is directly connected to the field

instrument. No host computer system is required. Operational commands supported by

the various field instruments can be issued via the 878 panel indicator.

• fall-back In this mode (optionally) a host computer system interrogates the field instruments.

When the host system would hamper, the 878 panel indicator takes over the interrogation

of the field instrument. In this manner a continued indication of the tank measuring data is

guaranteed. Immediately when the host system is back to normal, the indicator

automatically switches back to the listening mode.

Operational commands supported by the various field instruments can only be issued via

the 878 panel indicator in case the host computer system fails.

• listen When used in listen mode the 878 panel indicator is connected to the Honeywell Enraf

fieldbus and "listens" to the communication, refreshing its display each time the

corresponding field instrument transmits its data after being polled by the host system.

1.5 Data accuracy and integrity

The communication between the 878 panel indicator and the field instruments is digital and occurs via the

Honeywell Enraf fieldbus with the GPU protocol.

Received data is continuously checked and in case of an error the possible incorrect data is removed from the

display and an error code is shown. This technique avoids incorrect reading and guarantees fast, reliable and

absolutely correct data transfer as required by Weights and Measures authorities.

The resolution of the level transmission is 0.1 mm and 0.01 °C for temperature. If the 878 panel indicator does

not receive data within a programmed period the indicator will clear the display and show a time-out message.

Unpacking


2 Storage and unpacking

2.1 Storage

During storage, the 878 panel indicator should be kept in its original packing.

2.2 Unpacking and inspection

Inspect the packaging on arrival and immediately notify the transporter or sales representative if there is any

damage. Don't throw away the packing. It will be use when further transport on site is needed or when the

instrument is returned for service or warranty.

Inventory checklist:

• instrument in a housing of perforated steel; including rear-cover

• two mounting brackets

• a set fuses for 110 V/130 V and for 220 V/240 V

• the instruction manual you are reading now

• identification code sheet

The identification code specifies the type of instrument delivered and must agree with your order.

When the type on the label of your 878 panel indicator does not conform with the identification code, consult

your representative or Honeywell Enraf.

Mechanical installation


3 Mechanical installation

3.1 Preparation of the panel indicator

• Disconnect the rear cover by loosening the two screws. Press the leaf spring and slide the indicator out of

the housing.

• Slide the housing into the panel. Hook the bracket cams in the holes of the housing and fasten the

tightening screws until the mounting brackets are clamped against the panel rear-side (refer to figure 3.1).

3.2 Mounting a new indicator

Before inserting the indicator into the housing it is recommended to proceed with the electrical installation.

Insert the indicator into the housing until the leaf spring on the rear locks the instrument. Hook the rear cover in

on the left side and fasten the two screws on both corners.

Fasten the instrument when the electrical cables are connected. Fastening the back panel screws fixes the

instrument in the panel (refer to figure 3.1).

For Weights and Measures requirements it may be required to seal the instrument.

For this purpose the instrument is equipped with an eye on the end of the locking spring.

3.3 Removing an old indicator

The 878 panel indicator has the same panel cut-out as the

older 823, 825, 826 and 856 instruments.

Warning Be sure that the cabling is disconnected from all

electrical power sources before starting.

• Detach all existing cabling on the rear side.

• Pull the old instrument out and loosen the two

screws on both sides, and remove the old housing.

Figure 3.1 Rear cover

Electrical installation


4 Electrical installation

4.1 Rear panel cabling

• The connectors can be connected to the cables before mounting the instrument.

Care for the right orientation of the connectors. The terminal layout is found in figure 4.2.

Use multicore or telephone cables.

• Apply the local regulations for the mains connection.

When the indicator is replacing an older Honeywell Enraf indicator, pay attention to the fact that the

rear panel connection differs.

4.2 Preparation of the instrument

• Before sliding the 878 panel indicator in the panel and applying the mains voltage, check that the

mains voltage selector (refer to figure 4.1) is set to the right voltage.

The mains selector switch is found on the right-hand rear side, above the mains transformer.

4.3 Changing the mains voltage

The mains voltage is set in the factory according to your

order, together with the right fuse.

However, should the voltage be changed, check whether the

value of the primary fuse is according to the new voltage.

• The fuse F3 is located next to the mains connector

CN1. It has a flexible cap for protection against

touching.

Use 315 mA T (= slow blow) for 220 V or 240 V

630 mA T (= slow blow) for 110 V or 130 V

1 A T (= slow blow) for 65 V

Figure 4.1 Mains voltage selector

• The fuse F1 and F2 are secondary fuses.

Use for F1 1 A T (= slow blow)

F2 250 mA T (= slow blow)

• Loosen the locking screw of the mains selector switch, slide the switch to the required position.

The voltage is indicated on the PCB-board.

• Insert the locking screw again and fasten.

• Remount the instrument.

Caution: Always when the mains selector position is changed the value of the

primary fuse must be checked !

Electrical installation


4.4 Electrical connections

• Mains Connector CN1 (3 pins)

• Transmission Connector CN2 (4 pins)

- Pos. 1 and 2 always field instrument

- Pos. 3 and 4 always host computer

• Relays Connector CN10 (12 pins) (optional)

- Pos. 1, 2, 3 (Test)

- Pos. 4, 5, 6 (Low alarm)

- Pos. 7, 8, 9 (High alarm)

- Pos. 10, 11, 12 (Fail)

Figure 4.2 Terminal lay-out

Figure 4.3 Stand alone and listen

mode / fall-back mode

Software


5 Software

The 878 panel indicator is a microprocessor based instrument.

The resident software is installed in EPROM (Erasable Programmable Read Only Memory)

Non-volatile data such as settings are stored in NOVRAM (see section 7.7).

Data input in the menu is automatically stored in NOVRAM when the ENTER key is pressed and it is not lost

when the mains power supply is interrupted.

5.1 Updating the software

When changing of software is required, the EPROM has to be exchanged and the NOVRAM has to be

initialized.

5.2 Initializing

Normally the NOVRAM is initialized (= formatted) at delivery and in that case the following procedure can be

skipped. Only after replacing the EPROM for upgrading the 878 panel indicator to a new software version,

initializing of the NOVRAM is needed.

To initialize the NOVRAM jumper 4 must be shorted. The jumpers are on the left side at the horizontal printed

circuit board (refer to figure 5.1).

The following display menus appear:

NOVRAM setup mode:

Press ENTER

Figure 5.1 Jumpers

Place the jumper in position 2 again.

Note: The jumpers are only accessible when the 878 panel indicator is not sealed for Weights and Measures.

Commissioning


6 Commissioning

6.1 Mechanical and electrical installation

In this section a description is given of all actions to be taken when the 878 is mounted on site before it can be

used for the first time.

1. Check the mechanical installation (refer to section 3).

2. Check the electrical installation (refer to section 4).

3. Check the mains voltage setting and the value of the fuses (refer to section 4.3).

4. Apply the mains power supply.

If necessary adjust the display contrast with a small screwdriver by turning P1. It is warmly recommended to

use an isolated screwdriver. Pull-out the front panel (refer to figure 7.2).

5. After switching on the mains, the 878 panel indicator shows the start-up window within a few seconds.

After a while this window is replaced by the level (temperature) window or by the selected window in menu 8.

The instrument is now operational.

When the 878 panel indicator is used for the first time the non-volatile memory contains the default settings

and some of these settings, as addressing and operation mode, must be programmed. This is done in the

Setup mode. The default NOVRAM settings are shown in section 7.7

6. Start with the SELECT Menu. The 878 panel indicator is delivered with default factory settings, as indicated

in the "Table of menu settings" in section 7.

Display & configuration


7 Display & configuration

7.1 Display

A bright lighted Liquid Crystal Display, with four rows of each twenty characters

shows continuously the selected measuring data (refer to figure 7.1).

The top row shows a programmable text which can be a product name or a

tank number.

The second and third row show the data received from the field instruments.

The fourth row is a message line or displays the abbreviated functions of the

soft-keys. There are five different display windows available which can be

selected in menu 8.

Figure 7.1 Front panel

7.2 Display contrast

If necessary change the display contrast with a small isolated

screwdriver by turning P1.

Pull out the front panel (refer to figure).

Figure 7.2 Display contrast adjustment

7.3 The keyboard

There are two rows of each four soft-keys on the front panel.

The top row of keys is used to transmit the various commands to the field instrument. The function of the keys

depends on the selected window. The bottom row of the display shows the abbreviated key function.

Key functions can be switched on or off in menu 10.

The keys 354 will only be operational after entering the menu settings.

The bottom row is used for:

DISPLAY TEST when pressing this key all dots in the display screen are presented shortly followed by

a blanked display, to check missing dots.

This key has a second function, when the fourth row of the display shows a fail

message, this message can be removed by pressing this key.

SELECT when pressing this key the indicator windows or settings can be changed. By pressing

this key again the select mode can be left.

6 this key is only operational after entering the select menu and is used to step through

the various menus.

ENTER this key is used to confirm data entered in the select menu.

Caution Take care not to touch parts under tension as this might

damage the instrument.



7.4 Indicator LEDs

Four red indicator LEDs are located above and two white indicator LEDs are located on the right side of the

display (refer to figure 7.1).

TEST this LED is on if the test relay is activated.

LA low level alarm message from the field instrument

HA high level alarm message from the field instrument

FAIL field instrument failure or 878 panel indicator failure

RXD when this LED is flashing the 878 panel indicator receives data

TXD when this LED is flashing the 878 panel indicator transmits data to the field instrument

The RXD and TXD LEDs can be disabled in menu 11.

7.5 Jumper protection

The jumper protection levels are:

• level 1 - user

• level 2 - W&M

• level 3 - service

Menus settings are protected by jumper 1 and 2 only when the jumpers are removed. When the jumpers are

shorted the menu's are not protected. When using jumper 3 the relays and LEDs are tested. Remove also

connector C10 before using jumper 3. For jumper protections refer to section 7.7.

Note: It is NOT possible to change settings when the 878 panel indicator is sealed by W&M see section 3.2.

7.6 Selection of the menus

The procedure to enter the SET-UP menu is as follows:

• Press SELECT.

• Select SETUP using the 5 or 6 the key.

• Press three times ENTER

• Scrolling through the menus is done using the 5 , 6 or the 4 3 keys.

• Press ENTER, to enter the selected menu.

The setting of the menu can now be programmed.

To quit the selected menu the ENTER or the SELECT key can be pressed.

• When pressing the ENTER key the new programmed settings are stored.

• When pressing the SELECT key the new programmed settings are not stored.

Note: Menu settings can only be altered in case the menu is not jumper protected.

All programmed settings are permanently stored in the NOVRAM, and protected against power failure.



7.7 Table of menu settings

Menu

Menu name

Default settings

Possible selections

Jumper

1

Address + TOI a. Level b. Temperature c. Water d. Servo density e. Observed density

Address TOI 99 B 99 B 99 B 99 B 99 B

Address TOI 00...99 B, C, E 00...99 B, C, E 00...99 B, C, E 00...99 B, C, E 00...99 B, C, E

1

2

Baudrate

1200

1200, 2400

2

3

Time-out settings a. Transmission time-out b. Display time-out

minutes 1.0 min. 0.5 min.

selectable in steps of 0.5 minutes 00.0.....29.5 00.0.....29.5

2

4

Dimensions a. Level b. Temperature c. Water d. Servo density e. Observed density

Dim. W & M m appr °C appr m appr kg/m

3 appr

kg/m3 appr

Dimensions W & M m, ft, in, FIS appr/not appr °C, °F appr/not appr m, ft, in, FIS appr/not appr kg/m

3, °API, lbs/cuft appr/not appr

kg/m3, °API, lbs/cuft appr/not appr

2

5

Zero format

ø

ø or 0

2

6

Decimal separator

.

. or ,

2

7

Operational mode

Listen

Listen, Stand alone, Fall-back

2

8

Window selection a. Level b. Temperature c. Water d. Servo density e. Observed density

Small On On On On

Small, Large, Both, Off On, Off On, Off On, Off On, Off

2

9

Level / water scan TOR

B

B or L

2

10

Field commands a. Test / lock b. Block / unlock c. Water measurement d. Dens. measurement

yes yes yes yes

yes, no yes, no yes, no yes, no

2

11

Transm. LEDs

On

On, Off

2

12

Relay settings a. Alarm relay mode b. Relay config.

De-energized note

1

energized / de-energized

2 3

13

Tank identifier a. Tank identifier b. Show level address

878 panel indicator A1.3 No

Alpha numeric characters yes / no

2

14

Window names a. Level / temp. small b. Level / temp. large c. Water d. Servo density e. Observed density

a. Level / temp. small b. Level / temp. large c. Water d. Servo density e. Observed density

Alpha numeric characters

2

Note: These parameters are set at NOVRAM init. They cannot be changed by the user.



7.8 Menus

The following menus are available:

• Menu1 Address + TOI

For each address a TOI can be selected. TOI's are B, C or E (refer to appendix G).

Only when selecting C or E the contact status (external contact inputs from 811 servo gauge or 813

mechanical gauge transmitter) will be displayed.

• Menu 3 Time-out settings

transmission time-out is only used in fall-back mode. Selection of 0 minutes is not advisable: the

instrument will take over the communication as soon the host system has

finalized a request.

display time-out determines the maximum display time of the data before refreshment. When

reaching a display time-out the displayed data is set to display time-out (TO).

Note: In case a host fails to retrieve level, temperature or observed density data within the programmed time, a time-out will be displayed for the relevant item. When two or more items have a time-out the message "Display data time-out" will be displayed on the bottom line of the display window.

• Menu 4 Dimensions

Selection of dimensions is possible for the following measured values:

- level m, ft, in, FIS

- temperature °C, °F

- water m, ft, in, FIS

- servo density kg/m3, °API, lbs/cuft

- observed density kg/m3, °API, lbs/cuft

In addition to the dimension a W&M approved / not approved selection can be made.

When selecting "not approved" the selected dimension will be replaced by '##'.

Display

Level dimension

Level small

B record

Level small

L record

Level large B/L record

Dimension

Metres

+xxx*xxx

±xxx*xxxx

xxx*xxx

m

Feet

+0xxx*xxx

±xxxx*xxx

xxx*xxx

ft

Inches

+0xxxx*xx

±xxxxx*xx

xxxx*xx

in

Fractions

+0xx'xx"xx

±xxx'xx"xx

xx'xx"xx

/16

Legend: the (*) asterisk will be replaced by the selected decimal separator

(selectable in menu 6). The (x) represents a level value.



B/L record large display

As the level large display can only handle 6 characters there are some restrictions:

- When displaying the level retrieved with an L record the 0.1 mm will be rounded to millimetres.

- The '-' sign will only be displayed in case there are sufficient leading zero's available.

- In case of a '-' sign and insufficient space to display the sign the level will not be displayed. In this

case the level will be replaced by dashes. However the level status and alarm status will be

displayed.

Density dimension

Density display

kg/m3

ddddd*d

°API

±dddd*dd

lbs/cuft

ddd*ddd

• Menu 7 Operational mode

Listen, stand alone or fall-back can be selected.

The fall-back mode can only be selected when the fall-back relay is mounted (option).

- Listen when used in this mode the 878 panel indicator is connected to the Honeywell Enraf

fieldbus and "listens" to the communication, refreshing its display each time the

corresponding field instrument transmits its data after being polled by the host system.

If the host stops polling the displayed data will be cleared and a message will appear

(level time-out, temperature -, observed density - or display time-out).

- Stand alone when used in this mode the 878 panel indicator interrogates and reads directly the

connected field instrument(s). No host computer system is required.

- Fall-back in this mode the host computer is master of the communication link and interrogates

the field instrument(s). When the computer system goes down the 878 panel indicator

starts automatically to interrogate the connected field instrument(s).

After a complete scan of the 878 panel indicator the indicator will listen for one second

whether the host is active before starting a new scan.

Note: When the fall-back relay is defective the fail led will be on.

• Menu 8 Window selection

Switching a window on means it can be selected by entering the Select menu.

Switching a window off means that the window cannot be selected in the Select menu.

Switching to a large display window means that level data is displayed in triple size characters.



• Menu 9 Level (water scan) TOR

B or L can be selected. B retrieves level with a resolution of "1 mm" and L in "0.1 mm"

(if supported by the field instrument).

• Menu 10 Field commands

When pressing a key of a disabled command the message "Command not allowed" appears on the

display window.

• Menu 12 Relay settings (option)

a. alarm relay mode (energized, de-energized)

In this menu the alarm relay mode, energized or de-energized can be selected. This applies

only to the high and low alarm relays (HA and LA) in the 878 panel indicator. The high and low

alarm settings are programmed in the field instrument.

b. relay configuration (fall-back/ other relays - present, absent) (read only).

The presence of the relays can be verified by selecting the relay configuration. The

configuration cannot be changed in this menu. During initialisation of the NOVRAM the indicator

itself determines if and which relays are mounted. Changing the configuration is only possible

when the indicator is put in test mode with help of jumper 3.

The fail relay is normally energized. This relay will be de-energized:

- when the indicator has an operational failure.

- during initialization until all displayed level data is valid.

- during operation when any level data on the display is invalid.

- when no answer on a request of the indicator is received.

The test relay is normally de-energized. This relay is activated in case the received level status information of

the field instrument is not valid.

Note: During the execution of a combined water/density dip the low level alarm setting in the level gauge may be tripped and activate the low level alarm relay in the 878 panel indicator. In order to avoid this, the test relay (normally closed) may be switched in series with the low level alarm relay (normally open). This implies that the low level alarm will only be true, in case of a valid level status.



• Menu 13 Tank identifier

This menu enables the user to program a text string on the top row of the display window or to show

the gauge address. The text string is not visible in the large display screen (level).

a. tank identifier to be programmed

b. show level address yes/no (for service purposes or sometimes required by W&M)

The first row of the display can be programmed with a text string chosen by the user

(e.g. a tank name or product name). The characters can be selected by using the 5 and 6 keys.

See appendix H for the table of supported characters.

• Menu 14 Window names

The texts can be changed using the 3 4 5 6 keys (refer to appendix H)

Appendix


Appendix A Dimensional drawing

878 panel indicator

Appendix


Appendix B Specifications

Mechanical

Dimensions: panel cut-out (W x H) 106.5 x 91.5 mm (43/

16 x 3

5/

8 inch).

front panel (W x H) 120 x 105 mm (43/

4 x 4

1/

8 inch).

depth (excluding front panel) 368 mm (141/

2 inch).

Weight: 3.6 kg (7.2 lbs)

Housing: stainless steel

front polished stainless steel covered with dull polyester, transparent window

Colour: RAL 7030

General

Operation modes: stand alone

listen

fall-back (option)

Commands: accessible via push-buttons

Servo gauge commands: Lock Test

Block Test

Unlock Test

Water measurement/dip

Density/dip

Electrical

Mains: 110 Vac, 130 Vac, 220 Vac, 240 Vac (optional) 65 Vac

Voltage variation: + 10% to - 20%

Frequency: 45 Hz to 65 Hz

Fuses: 315 mA T slow blow (220 /240 Vac)

630 mA T slow blow (110 /130 Vac)

1 A T slow blow (65 Vac)

Dissipation: 25 VA peak current Imax = 2 A

Isolating voltage: 1200 Vac

Lightning protection: Inputs and outputs via isolating transformers

Connections: terminals for a wire size of up to 12 AWG thread

Relay outputs (option): relay for high and low alarm from field instrument, a test and a fail relay.

Fall-back (option): 1 relay

Contact rating: 250 Vac max, 3 A, max. 500 VA, single pole double throw.

Appendix


Display

Type of display: supertwist LCD with LED back-light

4 lines x 20 characters

character size 2.95 x 4.75 mm (0.12 x 0.2 inch), 5 x 8 dots

Display data: User selectable, level, water level, temperature, servo density, observed

density, alarm status and operational messages.

Function keys: 8 membrane keys in front panel for: repeatability test, lock test, block, unlock a

gauge, water measurement, water dip, density dip, combined dip, display test,

select, cursor control and enter.

Indication lights: 6 LEDs indicating:

LA, low level alarm

HA, high level alarm

Test, test relay activated

Fail, fail alarm relay activated

RXD, receive data

TXD, transmit data

Data transmission

Protocol: Enraf-GPU

Type of communication: Enraf bi-phase mark, half duplex.

Baudrate: 1200/2400 baud.

Field wiring: EN-bus or with fall-back option individual connection to gauge.

Number of conductors: 2 conductors, (twisted pair)

Cable resistance: 200 Ω per conductor max.

Cable capacitance: 1µF max.

Hardware

Printed circuit boards: IPS and IPU

Environment

Protection type: IP20 (indoor use)

Ambient temp. range: -10 °C to +60 °C (- 26 °F to +140 °F).

Storage temp. range: -50 °C to +85 °C (- 58 °F to +185 °F).

Appendix


Appendix C Window selection

The windows enabled in menu 8 are shown when pressing the SELECT key.

Selection is done using the 5 6 keys and confirmed by pressing ENTER.

Level & temperature small window

------- : user definable string menu 13 aa : level alarm status

llllllllll : level TO level time-out

FF alarm data error or level data

mmm : level dimension menu 4 error

ML motor limit switch reached

m metres BL displacer blocked

ft feet HA high level alarm

in inches LA low level alarm

/16 fractions -- no alarm

!!! invalid level ? as unknown alarm status

: refresh data indicator ee : level status

ttttttt : temperature TO level time-out

FF invalid level data

uu : temperature dim. menu 4 ML motor limit switch reached

BL displacer blocked

TO temperature time-out LT gauge in lock test

FF temperature failure TE gauge in test

!! limit switch open WL water level found

!! servo error DW searching for water

!! displacer blocked SD scan density

!! gauge in lock test -- valid level

!! gauge in test ? ls unknown level status

°C valid temperature

°F valid temperature Message line

? ts unknown temperature status

TG test

cccc : contact status LT lock test

BL block

F1 F2 failure in external hardware UN unlock

O2 contact 2 open

C2 contact 2 closed For additional messages refer to appendix E

O1 contact 1 open

C1 contact 1 closed

Appendix


Level (temperature) large window

: level aa : level alarm status

mmm : level dimension menu 4 TO level time-out

FL alarm data error or level data

m metres error

ft feet ML motor limit switch reached

in inches BL displacer blocked

/16 fractions HA high level alarm

!!! invalid level LA low level alarm

-- no alarm

: refresh data indicator ? as unknown alarm status

ttttttt : temperature ee : level status

uu : temperature dim. menu 4 TO level time-out

FL invalid level

TO temperature time-out ML motor limit switch reached

FF temperature failure BL displacer blocked

!! limit switch open LT gauge in lock test

!! servo error TE gauge in test

!! displacer blocked WL water level found

!! gauge in lock test DW searching for water

!! gauge in test SD scan density

°C valid temperature -- valid level

°F valid temperature ? ls unknown level status

? ts unknown temperature status

For additional messages refer to appendix E cccc : contact status

F1 F2 failure in external hardware

O2 contact 2 open

C2 contact 2 closed

O1 contact 1 open

C1 contact 1 closed

Appendix


Water window

------- : user definable string menu 14 Message line:

: refresh data indicator W_M water measurement

W_D water dip

llllllllll : water level UN unlock

mmm : level dimension menu 4 For additional messages refer to appendix E

m metres

ft feet

in inches

/16 fractions

!!! invalid level

ww : water status

FL general fail / initial setting

ML motor limit switch reached

BL displacer blocked

LT gauge in lock test

SD density scan active

TE gauge in test

DW searching for water (downwards)

NM water level not found

-- water found

NR measurement not ready

LV last valid level

Legend

• Initial after start-up dashes are displayed in the water window as the 878 panel indicator does not request

water. This will only be done after starting a water measurement or a water dip.

• After starting a water measurement/dip the 878 panel indicator will display temporarily the displacer level.

The dimension will be set to !!!

• As soon as a valid water level is found the dimension field will display the selected dimension (menu 4).

• When a water measurement is cancelled (via an Unlock) the last valid water level will be displayed

Together with an LV (last valid) indication.

• When starting a new water measurement/dip the water level field will be set to dashes, the dimension to

!!! and the status to 'NR'.

Appendix


Servo density window

------- : user definable string menu 14 dddddddd : density value pp : servo density type qqqqqqqq : density dimension

IP interface profile measurement kg/m3 kilogram per cubic meter

TP tank profile measurement °API degrees API

lbs/cuft pounds per cubic feet

ss : servo density status Message line:

FL general fail / initial setting D_D density dip

OF conversion overflow C_D combined dip (water & density)

UF conversion underflow UN unlock

NM no measuring point or out of range

NR measurement not completed

-- valid density For additional message refer to appendix E

: refresh data indicator

Legend

• Initial after start-up dashes are displayed in the density window as no measurement data are available.

The dimension will be set to !!!

• As soon as a valid density has been retrieved the dimension field will display the selected dimension

(menu 4).

• When starting a new density measurement the density field will be set to dashes, the dimension to !!! and

the status to 'NR'.

Appendix


Observed density window

------- : user definable string menu 14 oo : observed density status

: refresh data indicator FL general fail / initial setting

OR pressure out of range

dddddddd : density value TR exceeding trip pressure

M? manual value used

qqqqqqqq : density dimension L? last valid value used

DH density high alarm

kg/m3 kilogram per cubic meter DL density low alarm

°API degrees API -- valid density

lbs/cuft pounds per cubic feet

For addition messages refer to appendix E

Legend

• As soon as a valid density has been retrieved (item QQ) the dimension field will display the selected

dimension (menu 4).

• In case of a non valid measured value the dimension will be replaced by !!!!!!!

Messages

The bottom line of the display window is used to display a range of messages.

These messages are displayed for approximately 2 seconds.

878 panel indicator waiting for data

Level data time-out

Temperature time-out

Display data time-out

Xmission time-out

Observed density time-out

No gauge answer

Fall-back relay error

TEST executed

LOCKTEST executed

BLOCK executed

UNLOCK executed

WATER MEAS. executed

Water DIP executed

DENSITY DIP executed

COMBINED DIP exec.

W_M active

D_D active

W_D active

C_D active

Command not allowed

Key has no function

Appendix


Appendix D Service functions

Service data can be retrieved from the indicator using a combination of keys (pressing them all simultaneously).

Service data 1

Push DISPLAY TEST + Select

Service data 2

Push DISPLAY TEST + 6

Push DISPLAY TEST to exit service data 1 & 2.

Indicator reset

A software reset is initiated by simultaneously pressing the keys

DISPLAY TEST + 6666 + ENTER

Appendix


Appendix E Error display screen

AAA

BBBBBBBBBBBBBBBBBBBBBBBBBBB

CCCCCCCCCCCCCCCCC

000

USER reset

002

EPROM BCC error

004

LCD ram error

005

Watchdog error

006

External RAM error

007

NOVRAM EEPROM

error

008

NOVRAM RAM error

009

NOVRAM overall BCC

error

010

NOVRAM Device number

error

011

NOVRAM version

error

016

NOVRAM data error

030

LCD busy flag

time-out

037

LCD write error

101

Watchdog reset

102

Software generated

reset

140

Fall-back relay

error

141

Test relay error

142

Low alarm relay

error

143

High alarm relay

error

144

Indicator fail relay

error

145

PET transmission

circuit error

146

PET receive circuit

error

998

end of ROM reached

error

999

general software

error

Appendix


Appendix F Recommended spare parts

Pos. nr.

Description

Part number

2

Printed circuit board IPU without alarm relays

S0878606

3

Printed circuit board IPU including alarm relays and connector

S0878604

4

Printed circuit board IPS 110, 130, 220 or 240 Vac

S0878605

5

Printed circuit board IPS 65 Vac

0878.603

6

Display assembly

S0878620

7, 8, 9

878 Panel Indicator connector set

S0878901

10

878 Panel Indicator Touch panel assembly

S2601478

12, 13

Fuse set 878 Panel Indicator for 110 / 130 and 220 / 240 Vac

S0878970

14

Fuse 1 A T for 65 Vac

S2555175

Set screws and washers for 878 Panel Indicator

S0878902

Appendix


Appendix G Host communication

Record structure

The GPU protocol is used for data communication with the 878 panel indicator, based on a record structure.

A record is the largest independent block of data that is communicated over the transmission lines.

The various sorts of records are characterized by a letter: A to Z.

The basic structure of a record is as follows:

STX

Address NN

TOI

TOR

DATA

ETX

BCC

A record consists of a data field surrounded by an envelope. The envelope allows the receiver to detect the

incoming record and to verify its proper reception.

The envelope consists of:

• STX (start of transmission)

• ETX (end of transmission)

• BCC (block check character)

The data field consists of:

• Transmission address of the field instrument

• TOI (type of instrument)

• TOR (type of record)

• Data byte(s), (depending of the type of record)

For further information see the protocol manuals of the field instruments.

Record interpretation

Transmission address NN

The transmission address NN identifies the address of the Honeywell Enraf field instrument. The 878 panel

indicator offers the possibility to program individual addresses for level, interface level, temperature, servo and

observed density. These addresses can be selected in menu 1.

Example:

In case of an 854 with temperature and an 877 HIMS data can be retrieved as follows:

The address TA from the 854 can be used to retrieve level and interface level and temperature.

The address TA from the 877 HIMS can be used to retrieve observed density.

Type of instrument TOI

The type of instrument (TOI) as selected in menu 1 can be:

• B 811, 854, 97x and 877

• C 813, 97x and 877

• E 811 with external contacts

Appendix


Type of record TOR

The TOR can be a data request or answer message or an operational command.

The 878 panel indicator captures or requests only information from the following records:

• B level

• C temperature

• L level in 0.1 mm

• W search for water level

• Z in case of Z records (items SC, DZ, EZ, SD, TP and QQ only).

In case of operational commands the 878 panel indicator listens or requests information from the commands

listed in

Data

The data field is always used in case of an answer record. The length depends on the TOR.

If the TOR is a Z, the datafield commences always with an Item, identified with its two characters abbreviation.

Record transmission

Records are only transmitted in stand alone and fall-back modes.

Pushing the key under the soft-label in the display, the 878 panel indicator generates one of the following

records.

Soft-label display line 4

Description

TOR

TG

Test gauge

T

LT

Lock test

O

BL

Block

N

UN

Unlock

U

WM

Water measurement

W

UN

Quit water measurement & water/density combined

U

WD

Water dip

W

DD

Density dip

SC

CD

Combined dip

W/SC

Appendix


Z-record

The Z-record allows access to items used to program or to retrieve data from field instruments such as the 854,

872, 877, etc. If Z-records are used the TOR is always a Z. The data field (request & answer) contains always a

2 character abbreviation (ITEM).

The 878 panel indicator makes use of the following Z-records:

• SC servo density to retrieve the servo density from the 854

• QQ observed density to retrieve observed density from a HIMS or HTG field instrument

• DZ density profile stop this is the lowest density measurement level programmed in the 854.

The 878 panel indicator retrieves this value and down line loads this

value into item EZ.

DZ should always be programmed in such a way that it is above the

water level in the tank. This Item must be programmed in the 854.

• EZ density profile stop this item is used by the computer system or the 878 panel indicator to

down line load the density stop level.

• SD scan direction this item specifies whether the tank density profile measurement is

started from the product surface downwards or from the bottom

upwards.

• TP tank profile density scan this command starts a density profile measurement.

Appendix


Appendix H ASCII table

Index


Index

Alarm

contact .......................................................... 5, 11

high level ................................................ 5, 15, 19

low level ................................................. 5, 15, 19

Caution ................................................................... 3

Command

block ................................................................... 6

lock ..................................................................... 6

test ..................................................................... 6

unlock ................................................................. 6

Connector

CN1 ...................................................................... 10

Data ...................................................................... 33

Density

dip ...................................................................... 6

measurement ..................................................... 6

observed ............................................ 5, 6, 17, 34

profile stop ........................................................ 34

servo ...................................................... 5, 17, 34

Display

contrast ............................................................ 14

time-out ............................................................ 17

window ............................................................. 14

Honeywell Enraf fieldbus .............................. 5, 7, 18

EPROM ................................................................ 12

Error

code ................................................................... 7

display screen .................................................. 30

Fail

contacts ............................................................ 11

relay ................................................................. 19

Fuse

primary ............................................................. 10

secondary ......................................................... 10

Gauge address ....................................................... 5

HIMS ...................................................................... 6

HTG ........................................................................ 6

Identification code .................................................. 8

Indicator reset ...................................................... 29

Interface

dip ...................................................................... 6

measurement ..................................................... 6

Jumper protection ................................................. 15

Key

display test ....................................................... 14

enter ................................................................. 14

select ................................................................ 14

Keyboard .............................................................. 14

Large display ........................................................ 18

LCD .................................................................. 5, 14

LED

fail ........................................................................ 15

HA ....................................................................... 15

LA ........................................................................ 15

RXD ..................................................................... 15

test ....................................................................... 15

TXD ..................................................................... 15

Locking

screw ................................................................... 10

spring ..................................................................... 9

Mains voltage .......................................................... 10

Menu

address ................................................................ 17

dimensions .......................................................... 17

field commands ................................................... 19

level (water scan) ................................................ 19

operational mode ................................................. 18

relay settings ....................................................... 19

tank identifier ....................................................... 20

time-out settings .................................................. 17

window names ..................................................... 20

window selection ................................................. 18

Messages ................................................................ 28

Mounting brackets ..................................................... 8

Note ........................................................................... 3

NOVRAM ................................................. 5, 12, 13, 19

Operational mode

fall-back ..................................................... 7, 17, 18

listen ................................................................ 7, 18

stand alone ...................................................... 7, 18

PCB-board ............................................................... 10

Product

interface level ........................................................ 5

level ....................................................................... 5

Record

B .......................................................................... 17

B/L ....................................................................... 17

interpretation ....................................................... 32

L .......................................................................... 17

structure .............................................................. 32

transmission ........................................................ 33

Service

data 1 .................................................................. 29

data 2 .................................................................. 29

functions .............................................................. 29

Set-up menu ............................................................ 15

Soft-keys ............................................................. 5, 14

Software update ...................................................... 12

Spare parts .............................................................. 31

Index


Specifications

data transmission ............................................. 23

display .............................................................. 23

electrical ........................................................... 22

environment ..................................................... 23

general ............................................................. 22

hardware .......................................................... 23

mechanical ....................................................... 22

Tank Profile ............................................................ 6

Temperature ........................................................... 5

Test

contacts ............................................................ 11

relay ................................................................. 19

TOI ................................................................. 17, 32

TOR ................................................................ 19, 33

Transmission

address ............................................................ 32

time-out ............................................................ 17

Warning .................................................................. 3

Water measurement ............................................... 6

Weights and Measures ................................. 7, 9, 17

Window

density ................................................................ 6

level (temperature) ........................... 6, 13, 24, 25

observed density .............................................. 28

servo density .................................................... 27

start-up ............................................................. 13

water interface .............................................. 6, 26

Z-record ................................................................ 34

Honeywell Enraf

Delftechpark 39

2628 XJ Delft

The Netherlands

Tel: +31 (0)15-2701 100

Email: [email protected]

www.honeywellenraf.com

4416263 - Revision 3January 2013© 2013 Honeywell International Inc.

Documents

878 Panel Indicator - Honeywell · Introduction Instruction manual ... • high and low level alarms Figure 1.1 878 panel indicator ... As soon as the water level is detected,