9. TROUBLESHOOTING
IMR01Y09-E3
88
COM-JH
Problem Probable
cause
Solution
Power not being supplied
Check external breaker etc.
RUN lamp does not
light up
Appropriate power supply voltage
not being supplied
Check the power supply
Power supply terminal contact
defect
Retighten the terminals
Power supply section defect
Replace COM-JH
RUN lamp flashes
rapidly
Data collection just after the power
is turned on
After data collection, the lamp goes on,
if normal
Memory backup error
Replace COM-JH
RUN lamp flashes
slowly
Controller communication error
Controller is not connected
Confirm the controller connection
condition and connect correctly
FAIL lamp is lit
Hardware error
Replace COM-JH
FAIL lamp flashes
Communication environment
setting mode by the switch
Return the switch to its original
position
For the communication
environment setting mode by the
switch, see
5.4 Communication
Environment Setting by Rotary
Switch (P. 23)
.
DeviceNet
Problem Probable
cause
Solution
No response
(DeviceNet)
Wrong connection, no connection
or disconnection of the DeviceNet
communication cable
Confirm the connection method or
condition and connect correctly
Breakage, wrong wiring, or
imperfect contact of the DeviceNet
communication cable
Confirm the wiring or connector and
repair or replace the wrong one
Communication speed setting of
master (PLC) and the slave
(COM-JH) is mismatch
Confirm the communication speed
setting and set that correctly
Wrong node address setting
Confirm the address setting and set that
correctly
Continued on the next page.