Siemens SIMATIC Manual page 180

Digital modules
3.29 Digital output module SM 322; DO 8 x DC 24 V/ 0.5 A; with diagnostics interrupt; (6ES7322-8BF00-0AB0)
Causes of error and troubleshooting
Table 3- 30 Diagnostic messages of SM 322; DO 8 x DC 24 V/0.5 A, causes of error and troubleshooting
Diagnostics message
Wirebreak
Load voltage missing
Short-circuit to M
Short-circuit to L+
External auxiliary voltage
missing
Internal auxiliary voltage
missing
Fuse blown
Watchdog timeout
EPROM fault
RAM fault
180
Error detection Possible cause of error
condition ...
Only when output Wire-break between the module
= "1" and actuator
Channel not connected (open)
Only when output Defective output
= "1"
Only when output Overload at output
= "1"
Short-circuit of output to M
generally Short-circuit at output to L+ of the
module power supply
generally Power supply L+ to module missing Feed supply L+
generally Power supply L+ to module missing Feed supply L+
Fuse blown in module
generally Fuse blown in module
generally Infrequent high electromagnetic
interference
Defective module
generally Infrequent high electromagnetic
interference
Defective module
generally Infrequent high electromagnetic
interference
Defective module
To correct or avoid error
Connect the cable
Disable the "wire-break diagnos-
tics" parameter for the channel in
STEP 7
Replace the module
Eliminate overload
Eliminate the short-circuit
Eliminate the short-circuit
Replace the module
Replace the module
Eliminate the interference
Replace the module
Eliminate interference and cycle
the power supply of CPU off/on.
Replace the module
Eliminate interference and cycle
the power supply of CPU off/on.
Replace the module
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ