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Styrax Instruments India Pvt. Ltd. Plot No.48-51,Dollapally, Phase V Extn. I.D.A., Jeedimetla, Hyderabad – 055 Andhra Pradesh, INDIA Ph: +91 40 2309 3314 Fax: +91 40 2309 3315 Email: [email protected] www.styraxinstruments.com
[STYRAX INSTRUMENTS INDIA PVT LTD.]
Instruction Manual Clean Room Process Monitor Model No CPM105 Version 1.0
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 2
Index
Title Page no
1. Preliminary Examination 3
2. Description 4
3. Block Diagram 4
4. Network Diagram 5
5. Features And Specification 5
6. Mechanical Drawings 7
7. Installation 7
8. Instrument Operation 8
8.1 Instrument functionality 8
8.2 Keys functionality 10
8.3 Configuration mode 11
8.3.1 How to select mode
8.3.2 Individual mode Description
9. MODBUS Communication 30
9.1 Communication settings 30
9.2 Memory mapping 30
Appendix 33
Ordering information 34
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 3
1. Preliminary Examination:
Make sure that instrument and accessories including instruction manual are placed in packaging
box. Make sure that no damage has occurred no damage has occurred during transportation. If there is any
misplacing or damage notify us. Preserve the packing material for future use.
Check the packing material as per packing list. This should be approved by our QC department.
Packing list:
i. CPM105 Instrument
ii. Test & calibration Certificate
iii. Manual
Checked By:
Date:
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 4
2. Description
The STYRAX “Clean Room Process Monitor” has been specially developed keeping process
measurement requirements of CLEAN ROOMS in Pharmaceutical industries. The Process Monitor can
measure Relative Humidity, Temperature and Differential Pressure through inbuilt sensors. It has on
demand dew point display. The Monitor has status LEDs for process violation indication. Humidity,
Temperature and pressure will display individually and data transfers to any master device on modbus
serial communication. It also has communication diagnosis LED. The monitor has inbuilt buzzer for
audible process violation. It has keypad to programming the instrument by user. It has Stainless steel
Modular Face plate, which is designed as a mounting accessory for monitor suited for Modular wall Clean
Room applications where you need flush mounting mechanism. This instrument enables you to measure
humidity, temperature and differential pressure in the following fields:
HVAC (Heating, ventilation, Air conditioning, cooling)
Pharmacy industry.
Blood stations, pharmacies.
Horticultural and cultivation of plants.
3. Block Diagram
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 5
4. Network Diagram
5. Features and Specifications
Features:
Advanced Microcontroller based inbuilt RH, Temperature & DP measurement.
Software programmable channel ranges and unit.
Programmable resolution.
4 Digit, 0.39” bright LED display for displaying DP, RH & Temperature.
Process parameter status indication with 3 LEDs.
User selectable set limits for process value violation.
Inbuilt buzzer to audible process value violation.
Password protection for calibration and programming mode.
Software Calibration for 3 channels.
MODBUS RTU multi drop RS-485 serial communication for PLC, SCADA, etc.
Programmable baud rate.
Diagnosis of Communication with master.
Remote programmable from master device.
User programmable offset correction.
Brick and modular wall mounting.
Stainless steel enclosure.
Specifications:
8 sec
12 sec
1 sec
RS-485 isolated
3 (RH, T, DP)
Integral RH+T sensor
Integral RH+T sensor
Integral DP sensor
Specifications:
INPUTS
No. of inputs:
Input RH
Input T
Input DP
RESPONSE TIME
%RH
Temperature
Differential pressure
COMMUNICATION
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 6
6. Mechanical Dimensions
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 7
7. Installation
RCC Wall Concealed Mounting:
Wall Mounting:
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 8
Wiring diagram:
8. Instrument Operation
8.1. Functionality
Process Monitor has different modes of working. Description of each mode is given below:
a. Measurement mode: Measurement mode is default mode for Instrument. In measurement mode
instrument displays process values of three process parameters in respective display section.
b. Configuration mode: When PRG Key pressed in measurement mode causes to enter into
configuration mode. In configuration mode, we can configure/change the several key parameters
including instrument calibration. In detail will discuss in section 8.3.
c. Violation mode: When process value of any one of three parameters exceeds the set limits range,
Instrument will enter into violation mode measurement mode. In violation mode violated process
parameter display section will starts flashing, while flashing parameter enables, and respective
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 9
status LED becomes glow in red color and buzzer also becomes ON, while buzzer control
parameter ON.
d. Auto Zero Calibration mode: Hold the OK key for 5 sec causes to enter into auto zero calibration mode
from measurement mode. In this mode present differential pressure value will take it as zero offset.
Every unit has its own zero offset value. This mode indicates with ZERO display in place of
differential pressure display section. This mode remains for 5 sec only then it automatically comes
back to measurement mode.
e. Unit display mode: INC (▲) key press in measurement mode causes to enter into this mode. In this
mode present measured pressure unit will display at pressure display section. This mode remains
for 5 sec.
Display Indication of each unit is as mentioned below:
mmWC ->
mbar ->
mmHg ->
cmH2o ->
Inch. H2o ->
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 10
Psf(USA) ->
hPa ->
psi ->
Pascal ->
kPa ->
Figure: 1
f. Dew point display mode: SHIFT (◄) key press in measurement mode causes to enter into this mode.
In this mode Dew point Value will displays in unit of degC in the place of humidity display
section. This parameter display remains until next ◄ key press or reset of instrument.
8.2. Keys Functionality:
CPM has keypad with five keys named PRG/ESC, SHIFT, INC, DEC, OK/ACK.
Functionality of each key described below:
8.2.1 PRG/ESC Key: This key was used to enter into instrument configuration mode from measurement
mode. And also used for exit from configuration mode and sub modes of configuration mode.
8.2.2 SHIFT Key (◄): This key was used to select the edit digit, while editing the values in
configuration mode. This was also used for enter into the dew point display mode from measurement
mode.
8.2.3 INC Key (▲): This key was used to increment the editing digit value in configuration mode. This
key was used to enter into Unit display mode from measurement mode and also exit from unit display
mode to enter into measurement mode.
8.2.4 DEC Key (▼): This key was used to decrement the editing digit value in configuration mode.
8.2.5 OK/ACK Key: This key was used to accept the edit value in configuration mode. And also used to
acknowledge the process violation, to enter in to measurement mode from violation mode. Hold this
key for 5secs causes to enter into Auto zero calibration mode, while instrument is in measurement
mode.
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 11
8.3. Configuration mode:
To enter into this we need to enter valid Entry Code. It will asks code reentry, if
wrong code enters, this for once only. If enter wrong password for second time it automatically comes
out to measurement mode. Default Entry Code is 1111. User can change this in entry code change
mode.
Configuration mode has multiple number of Programming parameters and sub modes to configure,
As stated below:
o Unit selection
o Resolution Selection
o Instrument Calibration
o Set point Range Selection
o Measurement Range Selection
o Sensor Offset Selection
o Config. Sub mode
o Communication parameters sub mode
o Entry Code Change
o Display Section test
8.3.1. How to select mode: Valid password entry causes to display fist programming parameter. Password
reentry is allowed for once only, in case of wrong password entry. To wrap around the parameters
selection, use INC/DEC key. To change the specific parameter, press OK key to accept it. Flow for
one of the parameter or sub mode selection is as shown below.
S.No Action to perform Action to be Takes placed Display
1. To enter into configuration mode. Press PRG key, then it will ask
for password entry.
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 12
2. Edit the password to 1111 Use ◄/▲/▼ to edit the value
and press OK to conform.
3. To accept the enter password and
displays first programming
parameter Unit selection mode.
Press OK key
4. To go to Resolution Selection mode Press▲ key
5. To go to Instrument Calibration
mode
Press▲ key
6. To go to Set point range selection
mode
Press▲ key
7. To go to Measurement range
Selection mode
Press▲ key
.
8. To go to Sensor Offset Selection
mode
Press▲ key
9. To go to Config sub mode. Press▲ key
.
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 13
10. To go to Communication
Parameters sub mode.
Press▲ key
.
11. To go to Entry Code Change mode. Press▲ key
.
12. To go to Display section test mode. Press▲ key
.
13. To go to unit selection mode again,
or go to previous mode.
Press▲/▼key
Press OK key to edit the corresponding programming parameters mode. Then corresponding mode
parameters will display and press ESC key to come out from the mode.
If time out occurs, no key occurs for 30 sec, instrument automatically comes out from
configuration mode and enters into measurement mode.
In the calibration mode this time out is 30 minutes, to stabilize process value.
8.3.2. Individual mode Description: This section describes about how to edit each programming
Parameter mode and brief description about each one.
8.3.2.1 Unit Selection: This mode is to edit the unit of pressure and temperature parameters. When unit
change occurs, set point range, measurement range, sensor off set comes to default values. When ever
unit changes for any process parameter unit, calibration should do again.
Note: When pressure units changes resolution of the parameter automatically changes to specified
value in instrument specifications.
Instrument supported unit are as shown below table:
S.No Process Parameter Supported Units Default Unit
1. Humidity %RH (Fixed Unit) %RH (Fixed Unit)
2 Temperature Deg C, Deg F Deg C
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 14
3. Differential Pressure mmWC, mbar, mmHg, cmH2o, Inch H2o,
psf(USA), psi, hPa, kPa,Pa
mmWC
Table: 1
Operational flow to select is as shown below:
S.No Description Action to be Takes
placed
Display
1. Humidity Unit selection: Since
Humidity parameter has single unit,
press OK key to go to next parameter.
2 Temperature unit selection: Present
temperature unit will display after OK
key press.
Press OK key
3. To select required unit press INC or
DEC key.
Press ▲/▼key
4. Differential Pressure Unit selection:
Present pressure unit will display, after
accepting the temperature unit by press
OK key.
Press OK key
5. To select required unit press INC or
DEC key.
Press ▲/▼key
6. To accept edited unit and to go to next
programming parameter mode.
Press OK key
8.3.2.2 Resolution Selection:
S.No Description Key Operation Display
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 15
1. Humidity resolution selection: after
accepting previous mode or enter into
this mode by press OK key present
Humidity resolution will display.
2. To select required resolution press INC
or DEC key.
Press ▲/▼key
.
3 Temperature resolution selection:
Present temperature resolution will
display after accepting the humidity
resolution by OK key press.
Press OK key
.
4. To select required resolution press INC
or DEC key.
Press ▲/▼key
5. Differential Pressure resolution
selection: Present pressure resolution
will display, after accepting the
temperature resolution by press OK
key.
Press OK key
.
6. Since pressure resolution is fixed based
on the unit selection. Press OK key to
accept and to go to next mode.
Press OK key
8.3.2.3 Instrument Calibration:
All three process parameters can calibrate individually. In calibration mode, actual value (Direct
value read from sensor) of the process parameter will display to calibrate.
Since the humidity process value is dependent on the temperature process value, do the
temperature calibration before the humidity calibration.
To calibrate process parameter, select YES option when instrument ask for corresponding
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 16
parameter. After select YES to calibrate instrument will display “wait”. Until current process value
read from the sensor. To edit the process value press OK key after get stabilized process value and
then calibrate. In this key time out would be 30 minutes.
S.No Description Action to be Takes
placed
Display
1. After enter into the instrument
calibration mode, it will enter into
temperature parameter calibration. It
asks for, wish to do calibration or not.
2. To do temperature calibration by select
YES and press OK key.
Press ▲key
3. After accept calibration it will display
present process value. Until value read
from sensor it will display WAIT
message.
Press OK key
. .
4. Edit the process value to calibrated
value, when you get stabilized value.
Press ◄/▲/▼key
.
5. To accept calibrated value press OK
key. Then it will ask for, wish to do
Humidity parameter calibration or not.
Press OK key
6. To do humidity calibration by select
YES and press OK key.
Press ▲key
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 17
7. After accept calibration it will display
present process value. Until value read
from sensor it will display WAIT
message.
Press OK key
8. Edit the process value to calibrated
value, when you get stabilized value.
Use ◄/▲/▼keys
9. To accept calibrated value press OK
key. Then it will ask for, wish to do
Differential Pressure parameter
calibration or not.
Press OK key
10. To do Differential pressure parameter
calibration by select YES and press OK
key.
Press ▲key
11. After accept calibration it will display
present process value. Until value read
from sensor it will display WAIT
message.
Press OK key
.
12. Edit the process value to calibrated
value, when you get stabilized value.
Use ◄/▲/▼keys
.
13. To accept calibrated value press OK
key. Then it will go to next
programming parameter “set point
selection”.
Press OK key
8.3.2.4 Process Parameter Set point range Selection:
Every process parameter has low and high set point. By default these values are as same as
maximum values of that parameter specified in instrument specification.
If you entered these values out of the maximum ranges specified in instrument specification,
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 18
then it will ask for entry once.
S.No Description Action to be Takes
placed
Display
1. Humidity low set point selection: after
accepting previous mode or enter into
this mode by press OK key present
Humidity low set point will display.
Press OK key
2. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
3. To accept the edited value, press OK
key. Then will display Humidity high
set point value.
Press OK key
4. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
5. To accept the edited value, press OK
key. Then will display Temperature
low set point value.
Press OK key
.
6. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
. .
7. To accept the edited value, press OK
key. Then will display Temperature
High set point value.
Press OK key
.
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 19
8. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
.
9. To accept the edited value, press OK
key. Then will display Differential
pressure Low set point value.
Press OK key
.
10. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
.
11. To accept the edited value, press OK
key. Then it will display Differential
pressure High set point value.
Press OK key
.
12. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
.
13. To accept the edited value, press OK
key. Then it will display next
programming parameter measurement
range selection.
Press OK key
.
8.3.2.5 Measurement Range Selection:
Every process parameter has its own measurement range. Measurement range includes low
measure value and high measure value. Whenever process value becomes lower than the low
measurement value of that parameter, instrument will show low measure value as process value. And
whenever process value becomes higher than the high measurement value of that parameter,
instrument will show high measure value as process value.
S.No Description Action to be Takes Display
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 20
placed
1. Humidity low set point selection: after
accepting previous mode or enter into
this mode by press OK key present
Humidity low set point will display.
Press OK key
2. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
3. To accept the edited value, press OK
key. Then will display Humidity high
set point value.
Press OK key
4. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
5. To accept the edited value, press OK
key. Then will display Temperature
low set point value.
Press OK key
.
6. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
. .
7. To accept the edited value, press OK
key. Then will display Temperature
High set point value.
Press OK key
.
8. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
.
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 21
9. To accept the edited value, press OK
key. Then will display Differential
pressure Low set point value.
Press OK key
.
10. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
.
11. To accept the edited value, press OK
key. Then it will display Differential
pressure High set point value.
Press OK key
.
12. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
.
13. To accept the edited value, press OK
key. Then it will display next
programming parameter sensor offset
selection.
Press OK key
8.3.2.6 Sensor Offset Selection:
S.No Description Action to be Takes
placed
Display
1. Humidity resolution selection: after
accepting previous mode or enter into
this mode by press OK key present
Humidity sensor offset will display.
Press OK key
2. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 22
3. To accept the edited value, press OK
key. Then it will display Temperature
sensor offset value.
Press OK key
.
4. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
.
5. To accept the edited value, press OK
key. Then it will display Pressure
sensor offset value.
Press OK key
.
6. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Use ◄/▲/▼keys
.
7. To accept the edited value, press OK
key. Then it will display next
programming parameter of
configuration sub mode selection.
Press OK key
.
8.3.2.7 Configuration Sub mode:
S.No Description Action to be Takes
placed
Display
1. After accepting the configuration
sub mode By OK key press, when
“cnfg. mode” display, response
delay constant selection, first
programming parameter in sub
mode, will display.
Press OK here to edit this mode or
to select other parameter use
INC/DEC key.
Press OK key
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 23
2. To go to Differential pressure zero
offset Selection.
Press OK here to edit this mode or
to select other parameter use
INC/DEC key.
Press ▲key
3. To go to Buzzer Control Selection.
Press OK here to edit this mode or
to select other parameter use
INC/DEC key.
Press ▲key
4. To go to Display Flashing control
Selection.
Press OK here to edit this mode or
to select other parameter use
INC/DEC key.
Press ▲key
5. To wrap around sub mode
parameters press INC/DEC key.
To come out from the sub mode
press ESC key. Then it will display
communication sub mode.
Press ESC key
.
8.3.2.7.1 Response Time Constant Selection:
This constant represents the time delay in sec to update the process parameter display. Maximum
possible value can set is 20. By default it is 1.
S.No Description Action to be Takes
placed
Display
1. Humidity and Temperature response
delay constant: After accepting the
response delay constant it will display
present Humidity and Temperature
process parameters response delay
constant. By default it is 1.
2. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Press OK key to accept the edited
value.
Use ◄/▲/▼keys
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 24
3. Differential Pressure response delay
constant: After accepting the Humi.
&temp. response delay constant it will
display present differential pressure
response delay constant. By default it is
1.
Press OK key
4. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Press OK key to accept the edited
value.
Use ◄/▲/▼keys
5. After press OK key it will display next
parameter pressure zero offset
parameter selection.
Press OK key
8.3.2.7.2 Zero off set value Selection for Pressure Parameter:
S.No Description Action to be Takes
placed
Display
1. Differential Pressure negative side zero
offset: After accepting the zero offset
selection it will display present
negative zero offset. By default it is 0.
.
2. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Press OK key to accept the edited
value.
Use ◄/▲/▼keys
.
3. Differential Pressure positive side zero
offset: After accepting the negative zero
offset it will display present positive
zero offset. By default it is 0.
Press OK key
.
4. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Press OK key to accept the edited
value.
Use ◄/▲/▼keys
.
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 25
5. After press OK key it will display next
parameter buzzer control selection.
Press ESC key
8.3.2.7.3 Buzzer Control selection mode:
When instrument is in violation mode, buzzer will ON. Enable/disable of the buzzer working is
possible through this parameter.
S.No Description Action to be Takes
placed
Display
1. Buzzer control: After accepting the
Buzzer control selection it will display
present buzzer status. By default it is
ON.
Press OK key
2. To select required buzzer status press
INC or DEC key.
Press ▲/▼key
3. To accept the edited status press OK
key. Then it will display next parameter
display flashing control selection.
Press OK key
8.3.2.7.4 Display Flashing Control selection mode:
When instrument is in violation mode, display starts flashing. Flashing enable or disable is
possible through this parameter.
S.No Description Action to be Takes
placed
Display
1. Display Flashing Control: After
accepting the Flashing control
selection present display flashing
status. differential pressure response
delay constant. By default it is YES.
Press OK key
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 26
2. To select required flashing status press
INC or DEC key.
Press ▲/▼key
3. To accept the edited status press OK
key. Then it will display first
parameter. To come out from the sub
mode press ESC key. Then it will
display.
Press ESC key
.
8.3.2.8 Communication Parameters Selection sub mode:
CPM will work as slave module when it connects to MODBUS master. Some of the
communication parameters are given to user configurable. These parameters are
Instrument address selection
Baud rate selection
Remote programming Enable/disable
S.No Description Action to be Takes
placed
Display
1. After accepting the configuration sub
mode By OK key press, when “comm.
mode” display, Instrument Address
Selection, first programming parameter
in the sub mode, will display.
Press OK here to edit this mode or to
select other parameter use INC/DEC
key.
Press OK key
.
2. To go to Baud rate selection parameter.
Press OK here to edit this mode or to
select other parameter use INC/DEC
key.
Press ▲/▼key
3. To go to Remote Programming
enable/disable.
Press OK here to edit this mode or to
select other parameter use INC/DEC
key.
Press ▲/▼key
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 27
4. To wrap around sub mode parameters
press INC/DEC key.
To come out from the sub mode press
ESC key. Then it will display next
parameter Entry code change.
ESC key
.
8.3.2.8.1 Instrument Address selection:
By default instrument address is 1. 247 are the maximum address instrument can support. If
user Edit this value more than 247 it will ask for reentry for once. If user enters more than 247
second time also, instrument takes 247 as address and it will go to next parameter selection.
S.No Description Action to be Takes
placed
Display
1. Instrument Address selection: After
accepting the Instrument address
selection by press OK key, it will
display present instrument address. By
default it is 1.
Press OK key
2. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Press OK key to accept the edited
value.
Use ◄/▲/▼keys
3. After press OK key it will display next
parameter baud rate parameter
selection.
Press OK key
8.3.2.8.2 Baud rate Selection:
This Instrument supports Three baud rate, 9.6K, 19.2K, 38.4K for RS-485 communication
to communicate with any MODBUS master. Default baud rate is 9.6K.
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 28
S.No Description Action to be Takes
placed
Display
1. Baud Rate: After accepting the Baud
rate selection by press OK key, it will
display present baud rate for
communication. By default it is
9.6Kbps.
Press OK key
.
2. To select required baud rate press INC
or DEC key.
Press OK key to accept the edited
value.
Press ▲/▼key
.
3. After press OK key it will display next
parameter remote programming
enable/disable parameter selection.
Press OK key
8.3.2.8.3 Remote Programming control selection:
This parameter is control the configuring the programming parameters through remotely from
MODBUS master. When selects remote enable YES only, remote programming possible. Here
listed programming parameters which can change remotely from master.
Unit of the process parameter.
Resolution of the process parameter.
Set point range of the process parameter
S.No Description Action to be Takes
placed
Display
1. Remote Programming Enable/Disable:
After accepting the Remote
enable/disable selection by press OK
key, it will display present status. By
default it is NO.
Press OK key
2. To select required remote programming
status press INC or DEC key.
Press OK key to accept the edited
status.
Press ▲/▼key
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 29
3. After press OK key it will display first
parameter in this sub mode.
Press ESC key to go to next parameter
in mode, Entry code change.
Press ESC key
.
8.3.2.9 Entry Code change:
This code should enter to enter in to configuration mode to edit the programming parameters and
to do instrument calibration and to do display sections test. Default code is 1111.
This describes how to change the entry code. From next time onwards user should enter new one.
S.No Description Action to be Takes
placed
Display
1. New Entry Code: After accepting the
Entry Code change by press OK key, it
will display present configuration mode
entry code. By default it is 1111.
Press OK key
2. Edit the value to required value. Editing
digit appears with blinking. To editing
digit will select through ◄ key.
Press OK key to accept the edited
value.
Use ◄/▲/▼keys
3. After press OK key it will display first
parameter in the mode, display sections
test.
Press OK key
8.3.2.10 Display Section test:
This is to test display sections proper working. Each segment of 7 segments will display
sequentially.
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STYRAX INSTRUMENTS 30
S.No Description Action to be Takes
placed
Display
1. Display Sections Test: After accepting
the display sections test by press OK
key, it will display each segment
position.
Press OK key
2. Automatically comes out from this test,
when completes the two times checking
of every segment position or press ESC
key. After coming out from this mode it
will display first parameter Unit
Selection.
Press ESC key
3. To come out from the configuration
mode Press ESC key. Then it will enter
in to measurement mode.
.
.
.
9. MODBUS Communication:
CPM supports MODBUS communication. It works as slave device only. It works on MODBUS
serial RTU mode.
9.1. Communication settings:
Mode: RTU mode.
Baud rate: 9600bps (default)
Bits Per Byte: 8-bit
Start bit: 1
Stop bit: 1
Parity: Even
Note: CPM supports variable baud rate. User can change the Baud rate through keypad in
programming mode. Supported baud rates are 9600, 19200, 38400 bps.
9.2. Memory Mapping:
CPM supports three function codes; listed “Read input registers”, “Write single register” and
“Write holding registers”. Each Register is of length 16 Bit. Float values are stored as standard IEEE-
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STYRAX INSTRUMENTS 31
754 floating format. This format occupies 4 bytes.
9.2.1. Input Registers (3X): Input Registers stores process value of the parameters in float and integer format.
Integer value can convert in to float by dividing with resolution of respective parameter.
S.No Register
Address
No of Registers
(16 bit)
Parameter Description Remarks
1. 30300 2 Humidity Process Value This value is stored as float Data
type
2. 30302 2 Temperature Process Value This value is stored as float Data
type
3. 30304 2 Differential Pressure Process Value This value is stored as float Data
type
4. 30306 1 Humidity Process Value This value is stored as Signed
Integer Data type
5. 30307 1 Temperature Process Value This value is stored as Signed
Integer Data type
6. 30308 1 Differential Pressure Process Value This value is stored as Signed
Integer Data type
9.2.2. Holding Registers (4X):
Holding register stores the process value, resolution, units and set points. All parameters
are signed integers and occupies 16-bit register.
S.No Register
Address
No of Reg.
(16 bit)
Parameter
Description
Variants Default
Value
Remarks
1. 40600 1 Humidity Process
Value
2. 40601 1 Temperature
Process Value
3. 40602 1 Differential
Pressure Process
Value
4. 40603 1 Humidity
Resolution
0 – xxxx
1 – xxx.x
0
5. 40604 1 Temperature
Resolution
0 – xxxx
1 – xxx.x
1
6. 40605 1 Pressure
Resolution
0 – xxxx
1 – xxx.x
2 – xx.xx
3 – x.xxx
1 Pressure resolution fixed as
mentioned in specification.
7. 40606 1 Humidity unit 0 - %RH 0 Unit fixed. Don’t change this
value.
8. 40607 1 Temperature unit 0 – deg C
1 – deg F
0 In case unit change, low/high set
point should enter through keypad
or master.
9. 40608 1 Pressure unit 0 – mmWC
1 – mbar
2 – mmHg
3 – cmH2o
0 In case unit change, low/high set
point should enter through keypad
or master.
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STYRAX INSTRUMENTS 32
4 – inch H2o
5 – psf(USA)
6 – hPa
7 – psi
8 – Pascal
9 - kPa
10. 40609 1 Humidity low set
point
0 – 100 0 This value should enter as integer
values only. Convert the float in
to integer by multiply float value
with 10^resolution value.
Resolution value is varied
according to unit.
11. 40610 1 Humidity High
set point
0 – 100 100 This value should enter as integer
values only. Convert the float in
to integer by multiply float value
with 10^resolution value.
Resolution value is varied
according to unit.
12. 40611 1 Temperature Low
set point
-400 – 1000 -400 This value should enter as integer
values only. Convert the float in
to integer by multiply float value
with 10^resolution value.
Resolution value is varied
according to unit.
13. 40612 1 Temperature
High set point
-400 – 1000 1000 This value should enter as integer
values only. Convert the float in
to integer by multiply float value
with 10^resolution value.
Resolution value is varied
according to unit.
14. 40613 1 Pressure Low set
point
-1054 – 1054 -1054 This value should enter as integer
values only. Convert the float in
to integer by multiply float value
with 10^resolution value.
Resolution value is varied
according to unit.
15. 40614 1 Pressure High set
point
-1054 – 1054 1054 This value should enter as integer
values only. Convert the float in
to integer by multiply float value
with 10^resolution value.
Resolution value is varied
according to unit.
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STYRAX INSTRUMENTS 33
Appendix:
How to check RS-485 Communication:
1. If the communication LED blinks for every polling then communication is working properly.
2. Even communication LED blinks, if readings from instruments fails then do the following steps.
3. Switch off the power of all the instruments in the network.
4. Disconnect the instrument to be checked from the net work and switch ON the instrument.
5. Check the voltages across +and -, + and G, - and G terminals at the instrument.
6. The voltage across + and - should be greater than or equal to 3.0V
7. Voltage across +and G should be greater than voltage across + and - terminals.
8. Voltage across – and G should be difference of voltage across +/G and +/- terminals.
9. If the steps 4 to 6 are met checked instrument RS-485 section working properly, otherwise remove
the instrument and contact factory.
10. Do the same procedure for all the instruments. If all the instruments RS-485 section is OK, check
the input lines to the CPM105 network.
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STYRAX INSTRUMENTS 34
Ordering Information
Clean room process monitor:
CPM105 X X X
Model No Input type O/P Type Future Use
CPM105 0 – Inbuilt 1- RS485 X
1 – Remote
CPM-105 Manual Ver. 1.0
STYRAX INSTRUMENTS 35
Notes
For Further Information Contact:
Styrax Instruments India Pvt. Ltd. PLOT No.48-51, Dollapally road, Phase V Extn. I.D.A., Jeedimetla, Hyderabad – 014
Andhra Pradesh, INDIA
Ph: +91 40 2309 3314, +91 9640447474, Fax: +91 40 2309 3315
www.styraxinstruments.com Email: [email protected]