Siemens SIMATIC S7-400 Reference Manual page 425

Bytes 2 and 3 of the SM 431; AI 8 x 16 bit
Table B-25
Byte 2
Byte 3
Bytes 4 to 7 of the SM 431; AI 8 x 16 bit
Table B-26
Byte 4
Byte 5
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
Bytes 2 and 3 of the diagnostic data of the SM 431; AI 8 x 16 bit
Byte Bit
7 0
6 0
5 0
4 0
3 0
2 Operating mode 0: RUN; 1: STOP
1 0
0 Thermocouple connection error
7 0
6 Hardware interrupt lost
5 0
4 ADC/DAC error
3 RAM error
2 EPROM error
1 0
0 0
Bytes 4 to 7 of the diagnostic data of the SM 431; AI 8 x 16 bit
Byte Bit
7 0
6 Channel type B#16#71: Analog input
5
4
3
2
1
0
7 Number of diagnostics bits that the module outputs per channel: 16 bits long
0
B.5 Diagnostic data of the analog input modules as of byte 2
Meaning
Meaning
Diagnostic data of signal modules
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