Siemens S7-400PLC Especificaciones Pagina 435

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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
435
B.5 Diagnostic data of the analog input modules as of byte 2
Overview
The structure and contents of the different bytes of the diagnostic data for the special analog
input modules are described below. General rule: When an error occurs, the bit concerned is
set to "1".
You will find a description of possible error causes and appropriate remedies in the section
on the special module.
Bytes 2 and 3 of the SM 431; AI 16 x 16 bit
Table B- 18 Bytes 2 and 3 of the diagnostic data of the SM 431; AI 16 x 16 bit
Byte Bit Meaning
7 0
6 0
5 0
4 0
3 0
2 Operating mode 0: RUN; 1: STOP
1 0
Byte 2
0 Measuring range module incorrect or missing
7 0
6 Hardware interrupt lost
5 0
4 ADC/DAC error
3 RAM error
2 EPROM error
1 0
Byte 3
0 0
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