Siemens SINAMICS S120 Series - Page 181

Communication via Modbus TCP
6.6 Communication via data set 47
Communication
Function Manual, 12/2018, 6SL3097-5BD00-0BP0
179
Table 6- 17 Response for unsuccessful write operation - write request still not completed
Value
Byte
Description
MBAP header
03 h
20 h
7
8
Function code (read)
Number of following data bytes (20 h: 32 bytes ≙ 16 registers)
0001 h
2F00 h
0004 h
9,10
11,12
13,14
40601: DS47 Control = 1 (request is processed)
40602: Function 2F h(47), response length 0 (fault)
40603: Error code: 0004 Response Not Ready (response has still not been
issued)