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Diagnostic Data Of The Analog Input Modules As Of Byte 2 - Siemens SIMATIC S7-400 Reference Manual

Automation system module data
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Diagnostic data of signal modules
B.5 Diagnostic data of the analog input modules as of byte 2
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
Byte 2
Byte 3
420
Bytes 2 and 3 of the diagnostic data of the SM 431; AI 16 x 16 bit
Byte
Bit
7
0
6
0
5
0
4
0
3
0
2
Operating mode 0: RUN; 1: STOP
1
0
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
0
0
Meaning
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08

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