Siemens Simatic M7-400 Reference Manual page 592

Diagnostic Data of the Signal Modules
Bytes 2 and 3 of the SM 431; AI 8
Byte 2
Byte 3
Figure B-24
Bytes 4 to 7 of the SM 431; AI 8
Byte 4
Byte 5
Byte 6
Byte 7
Figure B-25
B-18
16 Bit
7 6 5 4 3 2 1 0
0 0 0 0
0 0
Thermocouple connection error
Operating status 0: RUN
7 6 5 4 3 2 1 0
0 0 0
0
EPROM error
RAM error
ADC/DAC error
Hardware interrupt lost
Bytes 2 and 3 of the Diagnostic Data of the SM 431; AI 8 x 16 Bit
16 Bit
7 6 5 4 3 2 1 0
0
Channel type B#16#71: analog input
7 0
7 0
7 6 5 4 3 2 1 0
Channel error, channel 0
Channel error, channel 1
...
...
...
...
...
Channel error, channel 6
Channel error, channel 7
Bytes 4 to 7 of the Diagnostic Data of the SM 431; AI 8 x 16 Bit
S7-400, M7-400 Programmable Controllers Module Specifications
1: STOP
Number of diagnostic bits that the module
outputs per channel: 16 bits long
Number of channels of the same
type in one module: 8 channels
A5E00069467-07