Siemens S7-400PLC Especificaciones Pagina 441

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Diagnostic data of signal modules
B.5 Diagnostic data of the analog input modules as of byte 2
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
441
Byte Bit Meaning
7 Channel error 7
6 Channel error 6
5 ......
4 ......
3 ......
2 ......
1 Channel error 1
Byte 7
0 Channel error 0
Bytes 8 to 23 of the SM 431; AI 8 x 16 bit
Data record 1 contains the channel-specific diagnostic data, starting at bytes 8 to 23. The
following table shows the assignment of the even diagnostic bytes (bytes 8, 10, to 22) for a
channel of the module.
Table B- 27 Even diagnostic byte for a channel of the SM 431; AI 8 x 16 bit
Byte Bit Meaning
7 Overflow
6 Underflow
5 Reference channel error
4 Wire break
3 0
2 0
1 0
Bytes 8-23
even
0 Configuring/parameter assignment error
The following table shows the assignment of the odd diagnostic bytes (bytes 9, 11, to 23) for
a channel of the module.
Table B- 28 Odd diagnostic byte for a channel of the SM 431; AI 8 x 16 bit
Byte Bit Meaning
7 User calibration does not correspond to the parameter assignment
6 0
5 0
4 0
3 Runtime calibration error
2 0
1 0
Byte 8-23
odd
0 0
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