Siemens S7-400PLC Especificaciones Pagina 424

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Diagnostic data of signal modules
B.3 Diagnostic data of the digital input modules as of byte 2
S7-400 Automation System Module Data
424 Reference Manual, Edition 09/2009, A5E00850736-06
Bytes 4 to 8 of the SM 421; DI 16 x DC 24 V
Table B- 4 Bytes 4 to 8 of the diagnostic data of the SM 421; DI 16 x DC 24 V
Byte Bit Meaning
7 0
6
5
4
3
2
1
Byte 4
0
Channel type B#16#70: Digital input
7
Byte 5
0
Number of diagnostics bits that the module outputs per channel: 8 bits long
7
Byte 6
0
Number of channels of the same type in one module: 16 channels
5 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
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