Bytes 11 to 42 of the SM 422; DO 32 x DC 24 V/0.5 A
Data record 1 contains the channel-specific diagnostic data, starting at bytes 11 to 42. The
figure below shows the assignment of the diagnostic byte for a channel of the module.
Table B-14
Diagnostic byte for a channel of the SM 422; DO 32 x DC 24 V/0.5 A
Byte
Bit
Meaning
Bytes 11 - 42 7
0
6
External load voltage missing
5
0
4
Wire break
3
Short-circuit to M
2
Short-circuit to L+
1
0
0
Configuring/parameter assignment error
Bytes 2 and 3 of the SM 422; DO 16 x AC 20-120 V/2 A
Table B-15
Bytes 2 and 3 of the diagnostic data of the SM 422; DO 16 x AC 20-120 V/2 A
Byte
Bit
Meaning
Byte 2
7
0
6
0
5
0
4
0
3
0
2
Operating mode 0: RUN; 1: STOP
1
0
0
0
Byte 3
7
0
6
0
5
0
4
0
3
0
2
EPROM error
1
0
0
0
Diagnostic data of signal modules
B.4 Diagnostic data of the digital output modules as of byte 2
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
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