Siemens SIMATIC S7-400 Reference Manual page 422

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

Bytes 9 to 24 of the SM 431; AI 16 x 16 bit

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.

Bytes 2 and 3 of the SM 431; AI 8 x RTD x 16 bit

Channel error 15

Channel error 14

Channel error 9

Channel error 8

Diagnostic byte for a channel of the SM 431; AI 16 x 16 bit

Reference channel error

Short-circuit to M

Configuring/parameter assignment error

Bytes 2 and 3 of the diagnostic data of the SM 431; AI 8 x RTD x 16 bit

Operating mode 0: RUN; 1: STOP

S7-400 Automation System Module Data

Reference Manual, Ausgabe 11/2016, A5E00850736-08

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