Siemens Simatic M7-400

Diagnostic Data of the Signal Modules
B-6
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Bytes 2 and 3 of the SM 421; DI 16 24/60 VUC
Byte 2
76 0
Operating status 0: RUN
1: STOP
54321
0
Byte 3
76 0
EPROM error
Hardware interrupt lost
54321
0
0
000 00
000 00
Figure B-5 Bytes 2 and 3 of the Diagnostic Data of the SM 421; DI 16 x 24/60 VUC
Bytes 4 to 8 of the SM 421; DI 16 24/60 VUC
Byte 4
76 054321
Byte 5
70
Channel type B#16#70: digital input
Number of diagnostics bits that the module
outputs per channel: 8 bits long
Byte 6
70
Number of channels of the same
type in one module: 16 channels
Byte 7
76 0
Channel error, channel 0
Channel error, channel 1
Channel error, channel 6
Channel error, channel 7
54321
...
0
Byte 8
76 0
Channel error, channel 14
Channel error, channel 15
54321
...
Channel error, channel 8
Channel error, channel 9
Figure B-6 Bytes 4 to 8 of the Diagnostic Data of the SM 421; DI 16 x 24/60 VUC