Siemens S7-400PLC Spezifikationen Seite 432

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Diagnostic data of signal modules
B.4 Diagnostic data of the digital output modules as of byte 2
S7-400 Automation System Module Data
432 Reference Manual, Edition 09/2009, A5E00850736-06
Byte Bit Meaning
7 Channel error 23
6 Channel error 22
5 ...
4 ...
3 ...
2 ...
1 Channel error 17
Byte 9
0 Channel error 16
7 Channel error 31
6 Channel error 30
5 ...
4 ...
3 ...
2 ...
1 Channel error 25
Byte 10
0 Channel error 24
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
7 0
6 External load voltage missing
5 0
4 Wire break
3 Short-circuit to M
2 Short-circuit to L+
1 0
Bytes 11 - 42
0 Configuring/parameter assignment error
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