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6 Handling of Errors and Maintenance
6 - 2 EtherCAT Communication Unit USER’S MANUAL (I574-E1)
6-1 Communication Line Errors
The 7 types of indicator lighting status are shown below.
6-1-1 Status Indicator Explanations and Error Handling
Abbreviation Name and status
ON ON
OFF OFF
F Flickering ON (50 ms) and OFF (50 ms)
B Blinking ON (200 ms) and OFF (200 ms)
SF Single flash ON (200 ms) and OFF (1,000 ms)
D Double flash ON (200 ms), OFF (200 ms), ON (200 ms) and OFF (1,000 ms)
Undefined
RUN ERR L/A IN
L/A OUT Meaning Remarks
ON OFF ON During Ether-
CAT communi-
cations
EtherCAT communications
are being executed.
The status is normal if either process data
communications, message communications,
or both are being executed.
−−F Link estab-
lished in physi-
cal layer
The operation waiting status
after the link is established in
the physical layer.
There was a status transition instruction
from the host system during operation, and
a transition was made to a status other
than Operational. Check that the Master
Unit is operating correctly.
Refer to the
manual for the Master Unit.
−−OFF Link not estab-
lished in physi-
cal layer
The link is not established in
the physical layer (cannot
participate in the network).
Check that the communications cable is
connected correctly to the connector.
Check that the communications cable is
wired correctly.
Check that the Master Unit is operating
correctly. If using an OMRON Master Unit,
check the Master Unit mode and the node
address-setting rotary switches of the
Communication Unit.
If using a Master Unit from another manu-
facturer, refer to the user's manual for that
master.
If there are devices that generate noise,
take necessary measures against the
noise to protect the Master Unit, Communi-
cation Unit and communications cables.
OFF OFF OFF Power supply
error
Power is not supplied cor-
rectly to the Communication
Unit.
Check that power is supplied correctly to
the inverter (for example, check whether
the wiring of the inverter main power sup-
ply is correct, the power supply voltage has
dropped, and the inverter is operating nor-
mally).
Check that the Communication Unit is
mounted correctly onto the inverter.
Eliminate the cause of the error, and then
turn the inverter power supply OFF and
ON again.
OFF ON Hardware error A hardware error has
occurred.
Check that the Communication Unit is
mounted correctly onto the inverter.
Replace the Communication Unit.
F
B
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