Siemens Simatic S7-300

Digital modules
3.27 Digital output module SM 322; DO 8 x AC 120/230 V/2 A ISOL (6ES7322-5FF00-0AB0)
S7-300 Automation System Module data
3-92 Manual, 08/2006, A5E00105505-04
3.27.2 Diagnostics of SM 322; DO 8 x AC 120/230 V/2 A ISOL
Diagnostic messages of SM 322; DO 8 x AC 120/230 V/2 A ISOL
The table below provides an overview of the diagnostic messages of SM 322; DO 8 x
120/230 VAC/2 A ISOL.
Table 3-23 Diagnostic messages of SM 322; DO 8 x AC 120/230 V/2 A ISOL
Diagnostics message LED Scope of diagnostics programmable
Watchdog time-out SF Module No
EPROM error SF Module No
RAM error SF Module No
Causes of error and troubleshooting
Table 3-24 shows the diagnostic messages of SM 322; DO 8 x AC 120/230V/2 A ISOL,
causes of error and troubleshooting.
Table 3-24 Diagnostic messages of SM 322; DO 8 x AC 120/230V/2 A ISOL, error causes and troubleshooting
Diagnostics message Error detection Possible cause of error To correct or avoid errors
Transient high electromagnetic
interference
Eliminate interference and cycle the
CPU power supply off and on
Watchdog time-out Always
Module defective Replace the module
Transient high electromagnetic
interference
Eliminate interference and cycle the
CPU power supply off and on
EPROM error Always
Module defective Replace the module
Transient high electromagnetic
interference
Eliminate interference and cycle the
CPU power supply off and on
RAM error Always
Module defective Replace the module
3.27.3 Interrupts of SM 322; DO 8 x AC 120/230 V/2 A ISOL
Introduction
The SM 322; DO 8 x AC 120/230 V/2 A ISOL can trigger diagnostic interrupts.
For detailed information on the OBs and SFCs mentioned below, refer to the
STEP 7 Online
Help.
Enabling interrupts
There is no default interrupt setting, i.e. interrupts are disabled if parameters are not set
accordingly. Program the interrupt enable parameter in STEP 7.