Siemens SINAMICS G120 CU230P-2, Operating Instructions Manual, Page: 139 / 346

Configuring the fieldbus
6.2 Communication via RS485
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
137
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 6- 30 Assigning the Modbus register to the parameters of the Control Unit
Modbus
Reg. No. Description Modbus
access Unit Scaling
factor On/Off text
or value range
Data / parameter
Process data
Control data
40100
Control word R/W -- 1 Process data 1
40101 Main setpoint R/W -- 1 Process data 2
Status data
40110
Status word R -- 1 Process data 1
40111 Main actual value R -- 1 Process data 2
Parameter data
Digital outputs
40200
DO 0 R/W -- 1 HIGH LOW p0730, r747.0, p748.0
40201 DO 1 R/W -- 1 HIGH LOW p0731, r747.1, p748.1
40202 DO 2 R/W -- 1 HIGH LOW p0732, r747.2, p748.2
Analog outputs
40220
AO 0 R % 100 -100.0 … 100.0 r0774.0
40221 AO 1 R % 100 -100.0 … 100.0 r0774.1
Digital inputs
40240
DI 0 R -- 1 HIGH LOW r0722.0
40241 DI 1 R -- 1 HIGH LOW r0722.1
40242 DI 2 R -- 1 HIGH LOW r0722.2
40243 DI 3 R -- 1 HIGH LOW r0722.3
40244 DI 4 R -- 1 HIGH LOW r0722.4
40245 DI 5 R -- 1 HIGH LOW r0722.5
Analog inputs
40260
AI 0 R % 100 -300.0 … 300.0 r0755 [0]
40261 AI 1 R % 100 -300.0 … 300.0 r0755 [1]
40262 AI 2 R % 100 -300.0 … 300.0 r0755 [2]
40263 AI 3 R % 100 -300.0 … 300.0 r0755 [3]