Non-Fatal Errors In The Cpu Unit - Omron CK3M Seres Hardware User Manual

6 Troubleshooting
Description
Hardware watchdog
timer error
Initial process error
6-3-2

Non-fatal Errors in the CPU Unit

For non-fatal errors in the CPU Unit, take the following corrective actions depending on the nature of
the error.
Description
EtherCAT physical layer
link not established
6-6
Cause
Unit disconnection Make sure that the Units are connected correctly.
during operations
Illegal user program Refer to 6-3-3 Initialization of CPU Unit Using USB Memory on
page 6-9, and execute re-initialization.
Ingress of conductive If there is conductive material nearby, blow air through the CPU
object Unit.
Noise If the error did not result from the above causes, cycle the power
to the Controller and see if that resets the error. If the error oc-
curs frequently, check the FG and power supply lines to see if
noise is entering on them. Implement noise countermeasures as
required.
CPU Unit failure If the error persists even after you make the above corrections,
replace the CPU Unit.
Ingress of conductive If there is conductive material nearby, blow air through the CPU
object Unit.
Noise If the error did not result from the above causes, cycle the power
to the Controller and see if that resets the error. If the error oc-
curs frequently, check noise entry paths such as the FG and the
power supply lines and implement noise countermeasures as re-
quired.
CPU Unit failure If the error persists even after you make the above corrections,
replace the CPU Unit.
Cause
The Ethernet cable used for
EtherCAT communications is
broken or the specified cable is
not being used.
Disconnected connector on the
Ethernet cable used for Ether-
CAT communications, contact
failure, or part failure
Power is not supplied to the
first slave connected to the
CPU Unit.
Failure of slave within Ether-
CAT network configuration
Noise
CPU Unit failure
CK3M/CK5M Series Programmable Multi-Axis Controller Hardware User's Manual (O036)
Corrective action
Corrective action
If the Ethernet cable is broken or if the specified
cable is not being used, replace the cable.
Reconnect the connector and check to ensure it is
mated correctly.
Supply power to the slave.
Replace the slave.
Check noise entry paths, and implement noise-re-
lated countermeasures as required.
Replace the CPU Unit.