5 Troubleshooting
5 - 14
CJ-series EtherCAT Slave Units Operation Manual (W541)
This section provides details about the error log registration function of the EtherCAT Slave Unit.
When an error occurs, information on the error and the time stamp are stored in the Unit’s internal RAM
as an error log record. Serious errors are recorded in non-volatile memory as well as RAM. The time
read from the CPU Unit during cyclic servicing is used for the time stamp.
The error log records stored in non-volatile memory are copied to RAM when the Unit starts operating,
so these records are retained even when the Unit’s power is turned OFF or the Unit is restarted.
When the error log is read, the error log records in RAM are read. When the error log is cleared, the
error log records in both RAM and non-volatile memory are erased.
The EtherCAT Slave Unit does not record errors caused by the EtherCAT network.
The CPU Unit’s time information is used for the time stamps in the EtherCAT Slave Unit’s error
log records. If the time information cannot be read from the CPU Unit, the time stamp will be as
follows.
• When the error log is read with a FINS command
The time stamp contains all zeroes.
• When the error log is read from the CX-Programmer
The invalid data and time are displayed.
Moreover, if the battery is replaced in a CJ-series CPU Unit, the time of the CPU Unit’s built-in
clock must be set again the next time that power is turned ON. If the built-in clock time is not
set, the correct time information will not be recorded. If this error log is read from the CPU Unit,
the time information will not be consistent.
The error log can record up to 203 records. If another error occurs when the log is full, the oldest record
will be erased to make room for the new error record.
The following FINS commands can be sent to the EtherCAT Slave Unit to read or clear the error log.
5-3-2 Error Log Registration
Error Log Storage Area
Error Log Overflows
5-3-3 FINS Commands for Error Logs
Command code
Function name
MRC SRC
21 02 ERROR LOG READ
03 ERROR LOG CLEAR
To Next Page
Loading...
Need help?
General
