Digital Modules
3-65
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Table 3-17 System diagnostics for SM 322 DO 16 x UC 24/48 V
System diagnosis byte 2:
D0..D3 Module Type 1111
D4: Channel information available No
D5: User information available No
D6: Diagnostic alarm from substitute No
D7: Spare
System diagnosis byte 3:
D0: Memory module incorrect/missing No
D1: Communication error No
D2: RUN/STOP mode No
D3: Time monitoring triggered Yes
D4: Internal power failure No
D5: Battery 1 empty No
D6: Complete backup failure No
System diagnosis byte 4:
D7: Spare
D0: Rack failure No
D1: Processor failure Yes
D2: EPROM error Yes
D3: RAM error Yes
D4: DAC error No
D5: Blown fuse No
D6: Hardware interrupt lost No
D7: Spare
Channel-specific diagnosis byte
D0: Parameter setup error No
D1: Grounding error No
D2: Short-circuit to P No
D3: Short-circuit to M No
D4: Wire-break No
D5: Spare
D6: Auxiliary supply missing No
D7: Overtemperature No
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