SMC Networks ex250-sen1 Operation Manual page 23

Trouble No.3
Trouble Possible cause
Incorrect connection
of the load with the
Output block
Only the
solenoid
Inconsistent polarity
valve/Output
between the solenoid
block LEDs do
valve
not light up
(VQC1000/2000) and
output block
Failure of the solenoid
valve and/or Output
block
Trouble No.4
Trouble Possible cause
The inputs that Inadequate total
are beyond the number of inputs from
maximum the Input block
point number connected with the SI
do not operate. unit
Investigation method of cause
Check that the output load cable is not
broken, and that the connection between
the output load and connector has not
loosened.
Check if the specifications of the SI unit
match those of the output load (+ common,
- common).
Check if the specifications of the SI unit
match those of the solenoid valve and
output block (+ common, - common).
Check the troubleshooting for the solenoid
valve.
Replace the SI unit with new one and
operate to check the normal operation
recovers.
Investigation method of cause
Check if the total number of inputs is 32 or
less.
-22-
Remedy
Review the connecting
condition of the output load.
(If the cable is broken,
replace it with a new one.)
Use - common with the
output load for the PNP
output.
Use - common with the
solenoid valve and Output
block suitable for the PNP
output of the SI unit.
Correct the trouble of the
solenoid valve.
Replace the SI unit with new
one.
Remedy
Eliminate extra unused
inputs from the manifold to
ensure the number of inputs
is 32 or less.
No.EX##-OMK0004-A