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No.EX##-OML0007
Fault
no.
When
Fault
Check
Action
Valve output setting for occupied
points is less than the number of
connected valves
Check the V_SEL switch setting in
the SI unit.
Correct the V_SEL switch setting in
the SI unit.
Program does not operate
normally.
Check if ladder program in PLC is
correct.
Correct ladder program, as
necessary.
Power supply for output is defectiveCheck the power supply.
Adjust or replace power supply.
Connection between SI unit and
solenoid valve manifold is defective
Check the connection between the
SI unit and solenoid valve manifold
(Connector pin not bent, etc.)
Connect the SI unit to the solenoid
valve manifold correctly.
SI unit output type is not compatible
with the solenoid valves.
Confirm that the SI unit and
solenoid valves are compatible:
EX600-SDN1 (PNP output)
Negative common type valve
EX600-SDN2 (NPN output)
Positive common type valve
Replace the SI unit or the solenoid
valve to give the correct
combination.
Defective SI unit
–
Replace the SI unit and check
correct operation.
5
Solenoid valve does
not operate
normally
Defective solenoid valve
–
Replace the solenoid valve and
check correct operation.
If the problem continues, refer to
the solenoid valve manual.
Input type is not compatible
Check if input unit specification
(PNP or NPN) and connected input
equipment specification are
compatible.
Replace input unit or input
equipment to give the correct
combination.
Power supply for control and input
is defective
Check the power supply.
Adjust or replace power supply.
Wiring or connection is defective
Check connection and wiring
between input equipment and
digital input unit.
Correct wiring and confirm all input
equipment and cables are
connected correctly.
Digital input unit is defective
–
Replace the digital input unit and
check correct operation.
6
Digital input
equipment does not
operate normally
Defective input equipment
–
Replace the input equipment and
check correct operation.
If the problem continues, refer to
the input equipment manual.
