Siemens Simatic M7-400 Manual de usuario Pagina 581

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Diagnostic Data of the Signal Modules
B-7
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Bytes 9 to 24 of the SM 421; DI 16 24/60 VUC
Data record 1 with bytes 9 to 24 contains the channel-specific diagnostic data. The
figure below shows the assignment of the diagnostic byte for a channel of the
module.
76 054321
00
Configuring/parameter assignment error
Wire break
0000
Figure B-7 Diagnostic Byte for a Channel of the SM 421; DI 16 x 24/60 VUC
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