Siemens SINAMICS G120 Operating Instructions Manual page 127

The valid holding register addressing range extends from 40001 to 40522. Access to other
holding registers generates the fault "Exception Code".
The registers 40100 to 40111 are described as process data. A telegram monitoring time
can be activated in p2040 for these registers.
Note
R"; "W"; "R/W" in the column Modbus access stands for read (with FC03); write (with FC06);
read/write.
Table 8- 27 Assigning the Modbus register to the parameters of the Control Unit
Modbus Description
Reg. No.
Process data
Control data
40100 Control word
40101 Main setpoint
Status data
40110 Status word
40111 Main actual value
Parameter data
Digital outputs
40200 DO 0
40201 DO 1
40202 DO 2
Analog outputs
40220 AO 0
40221 AO 1
Digital inputs
40240 DI 0
40241 DI 1
40242 DI 2
40243 DI 3
40244 DI 4
40245 DI 5
Analog inputs
40260 AI 0
40261 AI 1
40262 AI 2
40263 AI 3
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB
Modbus Unit Scaling
access factor
R/W -- 1
R/W -- 1
R -- 1
R -- 1
R/W -- 1
R/W -- 1
R/W -- 1
R % 100
R % 100
R -- 1
R -- 1
R -- 1
R -- 1
R -- 1
R -- 1
R % 100
R % 100
R % 100
R % 100
Configuring the fieldbus
8.4 Communication via RS485
On/Off text Data / parameter
or value range
Process data 1
Process data 2
Process data 1
Process data 2
HIGH LOW p0730, r747.0, p748.0
HIGH LOW p0731, r747.1, p748.1
HIGH LOW p0732, r747.2, p748.2
-100.0 ... 100.0 r0774.0
-100.0 ... 100.0 r0774.1
HIGH LOW r0722.0
HIGH LOW r0722.1
HIGH LOW r0722.2
HIGH LOW r0722.3
HIGH LOW r0722.4
HIGH LOW r0722.5
-300.0 ... 300.0 r0755 [0]
-300.0 ... 300.0 r0755 [1]
-300.0 ... 300.0 r0755 [2]
-300.0 ... 300.0 r0755 [3]
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