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External On/Off
Contacts
Description
Marking
(X6)
Room thermostat for
heating
(X7)
Safety temperature monitor
(STW)
RS485 interface
Note
It is possible to read current measured values, controller
- and output states with an external device (e.g. PC) and
to change the setting values.
Contacts
Description
Marking
(X13) Earthing on site
RS485 for Modbus/terminal
⊥
Earthing on site
RS485 for Modbus/terminal
B
B signal
RS485 for Modbus/terminal
A
A signal
RS485 for Modbus/terminal
11.3 Data output
Current measured values, controller status and output states can be
read and value settings changed in an external device, e.g. computer.
RS485 interface (4-pin terminal X14)
•
For terminal output or Modbus RTU communication.
Modbus RTU
•
For data output and possibility to change setting values.
•
For communication, a Modbus RTU master program (download,
for example "Modbus Poll") is required.
•
SETUP value "Address" must be set to "1 ... 253".
Transfer settings
Description
Value
Transmission rate
19200 bit/s
Data bits
8
Parity
No
Stop bits
1
Protocol
No protocol
Address
1 ... 253 (for Modbus)
Combi Port E
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Installation and operation manual
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29