Siemens Simatic S7-300

Digital modules
3.24 Digital output module SM 322; DO 8 x DC 24 V/ 0.5 A; with diagnostics interrupt; (6ES7322-8BF00-0AB0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
3-79
Causes of error and troubleshooting
Table 3-20 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
Wire-break between the module
and actuator
Connect the cable Wirebreak Only when output
= "1"
Channel not connected (open) Disable the "Diagnose Wire-break"
parameter for the channel in
STEP
7
Load voltage missing Only when output
= "1"
Defective output Replace the module
Overload at output Eliminate overload Short-circuit to M Only when output
= "1"
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+
Power supply L+ to module missing Feed supply L+ Internal auxiliary voltage
missing
generally
Fuse blown in module Replace the module
Fuse blown generally Fuse blown in module Replace the module
Infrequent high electromagnetic
interference
Eliminate interference Watchdog time-out generally
Module defective Replace the module
Infrequent high electromagnetic
interference
Eliminate interference and cycle
the power supply of CPU off/on.
EPROM error generally
Module defective Replace the module
Infrequent high electromagnetic
interference
Eliminate interference and cycle
the power supply of CPU off/on.
RAM error generally
Module defective Replace the module