Siemens SIMATIC S7-400 Reference Manual page 426

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 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.

Number of channels of the same type in one module: 8 channels

Channel error 7

Channel error 6

Channel error 1

Channel error 0

Even diagnostic byte for a channel of the SM 431; AI 8 x 16 bit

Reference channel error

Configuring/parameter assignment error

S7-400 Automation System Module Data

Reference Manual, Ausgabe 11/2016, A5E00850736-08

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