Omron M1 Series User Manual page 534

9 Troubleshooting
Symptom
The EtherCAT RUN
LED and ERR LED
both are out
EtherCAT ERR LED
is lit red
EtherCAT ERR LED
is lit red
The EtherCAT RUN
LED continues to
flash green and
there is no change
in the state of the
LED.
The EtherCAT L/A
IN LED and L/A
OUT LED stay out
and there is no
change in the state
of the LEDs
The EtherCAT L/A
IN LED and L/A
OUT LED stay
flashing green and
there is no change
in the state of the
LEDs
9-38
Possible cause
•
Power is not being supplied
normally to the inverter.
Fatal error such as a watchdog
timeout
•
The Sync Manager settings
are in error.
•
An error occurred in commu-
nication.
There was a state transition in-
struction from the host system
during operation, and the state
transitioned to a state other
than Operational.
•
The slave is not connected to
the network.
•
When the L/A IN LED and
L/A OUT LED of a specific
slave stay continually out and
there is no change in the
state of the LEDs, replace
that slave.
•
When there are devices in
the surrounding area that
generate noise, adopt meas-
ures against noise. Mounting
ferrite cores on the communi-
cation cable, near the con-
nectors will be effective.
•
The slave state has not tran-
sitioned to the operational
state.
Remedy
•
Check that the inverter power supply is
wired correctly. Remove the cause of the
power supply disconnection and turn the
inverter power supply OFF then back
ON again.
The communications unit is faulty. Replace
the inverter.
•
Correct the set values.
•
Check the connection and the length of
the communication cable. In addition,
take noise control measures such as
mounting the ferrite core on the commu-
nication cable.
•
If the ERR LED continues to flash in
spite of performing the above corrective
action, replace the inverter.
•
Referring to the manual for the Master
Unit, check that the Host Master Unit is
correctly operating.
•
Check that the Master Unit is correctly
operating. If using an OMRON Master
Unit, check the Master Unit mode and
the slave node address.
•
If the Master Unit is made by another
manufacturer, refer to the instruction
manual for that product.
•
Check that the wiring of communication
cables is correct.
•
Check that there are no breaks in the
wiring sections of the communication ca-
ble to the connector.
•
When the L/A IN LED and L/A OUT LED
of a specific slave stay continually out
and there is no change in the state of
the LEDs, replace that slave.
•
When there are devices in the surround-
ing area that generate noise, adopt
measures against noise. Mounting ferrite
cores on the communication cable, near
the connectors will be effective.
•
Referring to the manual for the Master
Unit, check that the Master Unit is cor-
rectly operating.
•
When the L/A IN LED and L/A OUT LED
of a specific slave stay continually flash-
ing and there is no change in the state of
the LEDs, replace that slave.
M1 Series EtherCAT Type User's Manual (I670)
Refer-
ence
page
page
2-10
page
2-49
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