Omron NJ-series User Manual page 482

 Current Errors
Open the Controller Error Tab Page on the NS-series PT's Troubleshooter to check the current
error's event name, event code, level, source, source details, details, and attached information 1 to
4. Observations are not displayed as errors.
However, for some NX Units, you cannot check the event name, event code, details, and attached
information for current errors. Also, observations are not displayed as errors.
 Log of Past Errors
Open the Controller Event Log Tab Page on the NS-series PT's Troubleshooter to check the time of
occurrence, level, source, event name, event code, details, and attached information 1 to 4 for past
errors.
Refer to the NS-series Programmable Terminals Programming Manual (Cat. No. V073) for details on
the NS-series PT's Troubleshooter.
However, you cannot check the log of previous errors for the Communications Coupler Units, NX
Units, EtherCAT slaves, and CJ-series Units.
Checking with Instructions That Read Function Module Error Status
Instructions are provided that allow you to read the error status of each function module from the user
program. These instructions get the status and the event code of the error with the highest level.
Applicable function module
PLC Function Module
Motion Control Function Module
EtherCAT Function Module
EtherNet/IP Function Module
For details on the instructions that get error status, refer to the NJ-series Instructions Reference Manual
(Cat. No. W502).
Checking with System-defined Variables
You can check the error status variables in the system-defined variables to determine the status of
errors in a Controller. You can read the error status variables from an external device by using commu-
nications. Refer to A-3 System-defined Variables for the system-defined variables.
NJ-series CPU Unit Software User's Manual (W501)
Instruction name
Get PLC Controller Error Status
Get I/O Bus Error Status
Get Motion Control Error Status
Get EtherCAT Error Status
Get EtherNet/IP Error Status
12 Troubleshooting
Instruction
GetPLCError
GetCJBError
GetMCError
GetECError
GetEIPError
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