Siemens Simatic M7-400 Manual de usuario Pagina 583

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Diagnostic Data of the Signal Modules
B-9
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Bytes 4 to 8 of the SM 422; DO 16 20-125 VDC/1.5 A
Byte 4
76 054321
Byte 5
70
Channel type B#16#72: digital output
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
0
Byte 7
76 0
Channel error, channel 0
Channel error, channel 1
Channel error, channel 6
Channel error, channel 7
54321
...
Byte 8
76 0
Channel error, channel 14
Channel error, channel 15
54321
...
Channel error, channel 8
Channel error, channel 9
Figure B-9 Bytes 4 to 8 of the Diagnostic Data of the SM 422; DO 16 x 20-125 VDC/1.5 A
Bytes 9 to 24 of the SM 421; DO 16 20-125 VDC/1.5 A
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
0
Configuring/parameter assignment error
0000
External auxiliary supply missing
Short-circuit to M
Figure B-10 Diagnostic Byte for a Channel of the SM 422; DO 16 x 20-125 VDC/1.5 A
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