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5 Troubleshooting
CJ-series EtherCAT Slave Units Operation Manual (W541)
5-1 Error Notification and Checking Methods
5
5-1-2 How to Check for Errors
Use the following methods to check the status of errors on the EtherCAT Slave Unit.
AL status This status reports errors related to Ether-
CAT communications. The ETG-defined
method is used for the error detection and
error code.
When an error occurs, the error is
written to the AL status register to
notify the EtherCAT master.
Unit status, Slave status The status of the EtherCAT Slave Unit allo-
cated to CIO Area is notified.
When an error occurs, the EtherCAT
Slave Unit notifies the CJ-series CPU
Unit.
Indicators These are the indicators on the EtherCAT
Slave Unit.
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5-1-2 How to Check for Errors
Checking method Information provided
Checking the indicators The indicators provide the status of the EtherCAT Slave Unit and the
level of the error.
Type of error notification Overview Notification method
EtherCAT master
Configuration Software:
• AL status
• Emergency message
CX-Programmer:
• Error log
CJ-series
CPU Unit
Indicators
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