Siemens Simatic S7-300 - Page 113

Siemens Simatic S7-300

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Digital modules

3.21 Digital output module SM 322; DO 16 x UC 24/48 V; (6ES7322-5GH00-0AB0)

S7-300 Automation System Module data

Manual, 08/2006, A5E00105505-04

3-65

System diagnostics byte 1: Technical data

System diagnostics byte 3:

D0: Wrong/missing memory module No

D1: Communication error No

D2: RUN/STOP operating state No

D3: Watchdog time-out Yes

D4: Internal power failure No

D5: Battery 1 low No

D6: Backup system failure No

System diagnostics byte 4:

D7: Reserve

D0: Rack failure No

D1: Processor failure Yes

D2: EPROM error Yes

D3: RAM error Yes

D4: DAC error No

D5: Fuse blown No

D6: Hardware interrupt lost No

D7: Reserve

Channel-specific diagnostics byte

D0: Faulty parameter settings No

D1: Grounding error No

D2: Short-circuit to P No

D3: Short-circuit to M No

D4: Wirebreak No

D5: Reserve

D6: Load voltage missing No

D7: Overtemperature No

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