Siemens S7-400PLC Dokumentacja Strona 434

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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
434 Reference Manual, Edition 09/2009, A5E00850736-06
Byte Bit Meaning
7
Byte 6
0
Number of channels of the same type in one module: 16 channels
7 Channel error 7
6 Channel error 6
5 ...
4 ...
3 ...
2 ...
1 Channel error 1
Byte 7
0 Channel error 0
7 Channel error 15
6 Channel error 14
5 ...
4 ...
3 ...
2 ...
1 Channel error 9
Byte 8
0 Channel error 8
Bytes 9 to 24 of the SM 422; DO 16 x AC 20-120 V/2 A
Data record 1 contains the channel-specific diagnostic data, starting at bytes 9 to 24. The
figure below shows the assignment of the diagnostic byte for a channel of the module.
Table B- 17 Diagnostic byte for a channel of the SM 422; DO 16 x AC 20-120 V/2 A
Byte Bit Meaning
7 0
6 0
5 Fuse blown
4 0
3 0
2 0
1 0
Bytes 9 - 24
0 Configuring/parameter assignment error
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