SMC Networks EX600-SDN Series Operation Manual page 49

Fault
When
no.
Valve output setting for occupied
points is less than the number of
connected valves
Program does not operate
normally.
Power supply for output is defectiveCheck the power supply.
Connection between SI unit and
solenoid valve manifold is defective
Solenoid valve does
5 not operate
normally
SI unit output type is not compatible
with the solenoid valves.
Defective SI unit
Defective solenoid valve
Input type is not compatible
Power supply for control and input
is defective
Digital input
Wiring or connection is defective
6 equipment does not
operate normally
Digital input unit is defective
Defective input equipment
Fault
Check the V_SEL switch setting in
the SI unit.
Check if ladder program in PLC is
correct.
Check the connection between the
SI unit and solenoid valve manifold
(Connector pin not bent, etc.)
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
Check if input unit specification
(PNP or NPN) and connected input
equipment specification are
compatible.
Check the power supply.
Check connection and wiring
between input equipment and
digital input unit.
- 49 -
Check
Correct the V_SEL switch setting in
the SI unit.
Correct ladder program, as
necessary.
Adjust or replace power supply.
Connect the SI unit to the solenoid
valve manifold correctly.
Replace the SI unit or the solenoid
valve to give the correct
combination.
Replace the SI unit and check
–
correct operation.
Replace the solenoid valve and
check correct operation.
–
If the problem continues, refer to
the solenoid valve manual.
Replace input unit or input
equipment to give the correct
combination.
Adjust or replace power supply.
Correct wiring and confirm all input
equipment and cables are
connected correctly.
Replace the digital input unit and
–
check correct operation.
Replace the input equipment and
check correct operation.
–
If the problem continues, refer to
the input equipment manual.
Action
No.EX##-OML0007