Omron CK3M Series User Manual page 185

Description
Ethernet physical layer link not
established
Interrupted communications
between Power PMAC IDE
and CPU Unit
DA output, DirectPWM output
and encoder power supply
from CK3W-AX Unit not output
CK3M-series Programmable Multi-Axis Controller User's Manual Hardware (O036)
Cause
The Ethernet cable used for
Ethernet communications is
broken or the specified cable
is not being used.
Disconnected connector on
the Ethernet cable used for
Ethernet communications,
contact failure, or part failure
Power is not supplied to the
Ethernet switch connected to
the CPU Unit.
Failure of device within Ether-
net network configuration
Noise
CPU Unit failure
Communications interruption,
due to disconnection and re-
connection of the Ethernet
cable used for Ethernet com-
munication between Power
PMAC IDE and the CPU Unit
while communication was be-
ing established
Communications interruption
due to power to Ethernet
switch between Power PMAC
IDE and CPU Unit being
turned OFF → ON while
communications were being
established
Communications interruption
due to power to CPU Unit be-
ing turned OFF → ON while
communications were being
established
Temporary communications
interruption due to noise
Power Supply Unit other than
CK3W-PD048 is being used.
CK3W-AX Unit failure
Internal 24 V power is not be-
ing input to the CK3W-AX
Unit due to a failure of the
Unit to its left.
6 Troubleshooting
Corrective action
If the Ethernet cable is broken or if the speci-
fied cable is not being used, replace the cable.
Reconnect the connector and check to ensure
it is mated correctly.
Supply power to the Ethernet switch.
Replace the device.
Check noise entry paths, and implement
noise-related countermeasures as required.
Replace the CPU Unit.
If communications are interrupted between
Power PMAC IDE and the CPU Unit with
Ethernet communications established, com-
munications cannot be reestablished simply
by rectifying the problem that interrupted the
communications. To reestablish the communi-
cations, you need to click Communication
Setup in Power PMAC IDE and restart com-
munications.
Check noise entry paths, and implement
noise-related countermeasures as required.
Then reestablish communications between
Power PMAC IDE and the CPU Unit.
To reestablish the communications, you need
to restart Power PMAC IDE or reestablish the
communications by using Power PMAC IDE.
Check the Power Supply Unit model.
Replace the CK3W-AX Unit.
Replace the Unit to the left of this Unit.
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