Siemens SIMATIC S7-400 Reference Manual page 425
Automation system module
data
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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
425
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