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Functions
14.5 Modbus TCP communication
Example
The following example describes writing to registers 40150 ... 40154.
Table 14-33
Modbus Appli‐
cation Header
Protocol Data
Unit
Table 14-34
Modbus Appli‐
cation Header
Protocol Data
Unit
Table 14-35
Modbus Applica‐
tion Header
Protocol Data Unit
14.5.7
Communication via DS 47
Overview
Communication via DS 47 is possible using registers 40601 ... 40722.
394
Structure of a write request
Value
Byte
Description
-
0 ... 6
-
10 h
7
Function code
0095 h
8, 9
Register (40150)
0005 h
10, 11
Number of registers to be written to (five registers)
0A h
12
Number of data bytes (five registers of two bytes each = ten bytes)
047E h
13,14
40150: Control word
1000 h
15,16
40151: Main setpoint
0000 h
17,18
40152: Process data item 3
0000 h
19,20
40153: Process data item 4
0815 h
21,22
40154: Process data item 5
Response of the converter to a valid write request
Value
Byte
Description
-
0 ... 6
-
10 h
7
Function code
0095 h
8, 9
Register (40150)
0005 h
10, 11
Number of registers to be written to (five registers)
Response of the converter to an invalid write request
Value
Byte
Description
-
0 ... 6 -
90 h
7
Highest bit = 1 and function code
01 h
8
Error code
...
04 h
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
SINAMICS G220 converter
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