Diagnostics data of signal modules
B.3 Channel -specific diagnostics data, starting at byte 8
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
B-5
B.3 B.3 Channel-specific diagnostics data, starting at byte 8
Introduction
Data record 1 contains the channel-specific diagnostic data, starting at bytes 8 to 15. The
figures below show the assignment of the diagnostics byte of a module-specific channel or
channel group. General rule: An error is indicated by a logic "1" at the relevant bit.
For information on possible error causes and troubleshooting routines, refer to the chapter
"Module diagnostics."
Digital input channel of SM 321; DI 16 x DC 24 V; with hardware/diagnostics interrupts
&RQILJXULQJSDUDPHWHUDVVLJQPHQWHUURU
*URXQGIDXOW
6KRUWFLUFXLWWR/
6KRUWFLUFXLWWR0
:LUHEUHDN
6HQVRUVXSSO\PLVVLQJ
Figure B-4 Diagnostics byte for a digital input channel of SM 321; DI 16 x DC 24 V
Digital output channel of SM 322; DO 8 x DC 24 V/0.5 A; with diagnostics interrupt
&RQILJXULQJSDUDPHWHUDVVLJQPHQWHUURU
*URXQGIDXOW
6KRUWFLUFXLWWR/
6KRUWFLUFXLWWR0
:LUHEUHDN
([WHUQDODX[LOLDU\VXSSO\PLVVLQJ
2YHUWHPSHUDWXUH
Figure B-5 Diagnostics byte for a digital output channel of SM 322; DO 8 x DC 24 V/0.5 A
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