Siemens SIMATIC Manual page 166

Digital modules
3.26 Digital output module SM 322; DO 16 x UC 24/48 V; (6ES7322-5GH00-0AB0)
System diagnostics for SM 322;DO 16 x UC24/48 V:
Table 3- 27 System diagnostics for SM 322 DO 16 x UC 24/48 V
System diagnostics byte 1:
D0: Module fault
D1: Internal fault
D2: External fault
D3: Channel fault
D4: External auxiliary voltage missing
D5: Front connector missing
D6: Module not programmed
D7: Incorrect parameters
System diagnostics byte 2:
D0..D3: Module class
D4: Channel information available
D5: User information available
D6: Diagnostics interrupt from substitute
D7: Reserve
System diagnostics byte 3:
D0: Wrong/missing memory module
D1: Communication error
D2: RUN/STOP operating state
D3: Watchdog timeout
D4: Internal power failure
D5: Battery 1 low
D6: Backup system failure
D7: Reserve
System diagnostics byte 4:
D0: Rack failure
D1: Processor failure
D2: EPROM fault
D3: RAM fault
D4: DAC error
D5: Fuse blown
D6: Process interrupt lost
D7: Reserve
166
Technical data
yes
yes
yes
no
yes
no
yes
yes
1111
no
no
no
no
no
no
yes
no
no
no
no
yes
yes
yes
no
no
no
Manual, 06/2017, A5E00105505-AJ
S7-300 Module data