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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 16 Connection to superposed systems 01.12.2009
16.2 Modbus
With this type of bus protocol, the LMV37.4... basic unit operates as a slave on the
Modbus and the transmission mode used is RTU (Remote Terminal Unit).
For more detailed information, refer to the Modbus User Documentation (A7541).
No. Parameter
145
Device address for Modbus of basic unit
Setting values
1…247
146
Setting of Baud rate for Modbus communication
Setting values
0 = 9600
1 = 19200
147
Setting of parity for Modbus communication
Setting values
0 = none
1 = odd
2 = even
The factory settings of the parameters are shown on the parameter list.
&
Note
If bus communication breaks down, the mode, Modbus operating mode and prede-
fined target output must be rewritten.
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