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-20-
No.EX
※※
-OMU1012
Failure Problem
Fault No.1
Problem
Possible cause
Investigation method
Countermeasures
SI unit PW
LED is OFF
Incorrect wiring of
the power supply for
CC-Link IE Field
Check the power supply cable connections
and check for broken wires.
Tighten the power supply
cable connection. (If the cable
has a broken wire, replace the
cable).
Correct the wiring of the power
supply cable.
Failure of the power
supply for CC-Link
IE Field
Check the power supply voltage of the
CC-Link IE Field power supply.
Supply 24 VDC ±20% to the
power supply for the SI unit
control unit.
Fault No.2
Problem
Possible cause
Investigation method
Countermeasures
SI unit PW (V)
LED is OFF
Wiring of the
solenoid valve
power supply is
defective
Check the power supply cable connections
and check for broken wires.
Tighten the power supply
cable connection. (If the cable
has a broken wire, replace the
cable).
Correct the wiring of the power
supply cable.
Solenoid valve
power supply failure
Check proper supply voltage of solenoid
valve power supply.
Supply 24 VDC 10%/-5% to
the solenoid valve power
supply.
Fault No.3
Problem
Possible cause
Investigation method
Countermeasures
SI unit
P1/P2 LINK
LED turned
OFF
CC-Link IE Field
communication
error with the
CC-Link IE Field
device one level
above
Check the condition of the CC-Link IE Field
device one level above.
Check and Supply power to
the CC-Link IE Field
device one level above.
Check the BUS IN side communication
cable connections and check for broken
wires.
Additionally tighten the
communication cable wiring.
(Replace the cable if it is
broken.)
Check that there are no high voltage cables
or equipment that generates noise around
the communication cable and SI unit.
Take measures to keep the
communication cable and SI
unit away from noise sources.
Fault No.4
Problem
Possible cause
Investigation method
Countermeasures
SI unit
RUN LED is
OFF
SI unit failure
Replace the SI unit with a new one and
operate to check the normal operation
recovers.
Replace the SI unit with a new
one.
Summary of Contents for EX250-SCF1-X200
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