Digital modules
3.10 Digital input module SM 321; DI 16 x 24 VDC; with hardware and diagnostic interrupts
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
3-29
3.10.3 Diagnostics of SM 321; DI 16 x DC 24 V
Diagnostics messages of SM 321; DI 16 x DC 24 V
The table below shows an overview of the diagnostic messages of SM 321; DI 16 x DC 24 V.
Table 3-11 Diagnostics messages of SM 321; DI 16 x DC 24 V
Diagnostics message LED Scope of diagnostics programmable
Encoder supply missing SF Channel group
Wirebreak SF Channel group
Module not programmed SF Channel group
Yes
External auxiliary voltage missing SF Module
Internal auxiliary voltage missing SF Module
Fuse blown SF Module
Incorrect module parameters SF Module
Watchdog time-out SF Module
EPROM error SF Module
RAM error SF Module
Hardware interrupt lost SF Module
No
Note
Prerequisite for detecting errors indicated by programmable diagnostic messages is an
appropriate configuration of the digital module in STEP 7.
(6ES7321-7BH01-0AB0)
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