Siemens SIMATIC - 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)
S7-300 Module data
180 Manual, 06/2017, A5E00105505-AJ
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
Error detection
condition ...
Possible cause of error
To correct or avoid error
Wirebreak Only when output
= "1"
Wire-break between the module
and actuator
Connect the cable
Channel not connected (open) Disable the "wire-break diagnos-
tics" parameter for the channel in
STEP 7
Load voltage missing Only when output
= "1"
Defective output Replace the module
Short-circuit to M Only when output
= "1"
Overload at output
Eliminate overload
Short-circuit of output to M
Eliminate the short-circuit
Short-circuit to L+ generally Short-circuit at output to L+ of the
module power supply
Eliminate the short-circuit
External auxiliary voltage
missing
generally Power supply L+ to module missing Feed supply L+
Internal auxiliary voltage
missing
generally
Power supply L+ to module missing
Feed supply L+
Fuse blown in module
Replace the module
Fuse blown
generally
Fuse blown in module
Replace the module
Watchdog timeout generally Infrequent high electromagnetic
interference
Eliminate the interference
Defective module
Replace the module
EPROM fault generally Infrequent high electromagnetic
interference
Eliminate interference and cycle
the power supply of CPU off/on.
Defective module
Replace the module
RAM fault generally Infrequent high electromagnetic
interference
Eliminate interference and cycle
the power supply of CPU off/on.
Defective module
Replace the module