13
www.eltherm.com
13
www.eltherm.com
The following value are transferred by bus:
1.
Data word
Controller
IS
value,
HI
,
LO
2.
Data word
Controller
REF
value,
HI
,
LO
3.
Data word
Controller
Undertemperature alarm
value
,
HI
,
LO
4.
Data word
Controller error
Sensor error
0x01
0000 0001
Undertemperature alarm
0x02
0000 0010
Measuring range error
0x04
0000 0100
MODBUS SETTINGS
(Ex-TC/It-M)
SUPPORTED MODBUS PROTOCOL FUNCTIONS
Code MODBUS function Register
Action
03h
READ HOLDING
REGISTERS
4xxxx
Read setpoints and error
messages from control-
lers and limiters
08h
DIAGNOSTIC
Function test of slaves
10h
WRITE MULTIPLE
REGISTERS
4xxxx
Send setpoints
to controllers
and limiters
MODBUS PARAMETERS
MASTER-SLAVE application
Ex-TC/M
Interface
RS485
Format
RTU
Start bit
1
Data bit
8
Stop bit
1
Transmission rate
9600 baud
Parity
None-parity
Slave ID
1...120
COMPLETING THE INSTALLATION
CLOSING THE HOUSING
1
Visual inspection of housing and cover to ensure they are
not damaged. Cover can only be inserted in one position
(locking arms / twist protection recesses have different
width). Move the cover to the appropriate position.
2
Attach the cover with the narrower locking arm (without a
headless screw), close the cover
and…
3
Use the pliers to lock the cover
OPERATION & MAINTENANCE
•
Observe the locally applicable safety regulations when the Ex-
TC is in operation
•
Comply with the permitted operating conditions in accordance
with the “
TECHNICAL DATA
” section and the labelling . (type/
dimensions of lines, pipe diameter, operating conditions,
IP
protection type).
DANGER
•
If the temperature setpoint needs to be checked,
first make certain that there is no explosive atmos-
phere present and that none can occur.
•
Then connect the power supply and open the
housing cover.
•
Instead of the Pt100 sensor, connect a Pt100
simulator and check the switching function of the
controller.
•
After the check is complete, reconnect the Pt100
sensor and close the cover.
WARNING
The junction box may only be
opened (this also includes loosening cable entries!)
when it is disconnected from the power supply.
