SMC Networks ISE80 - Fault Diagnosis and Countermeasures

-45-
No.PS※※-OMM0003-J
○Faults and countermeasures
Fault No.
Fault
Possible cause
Investigation method
Countermeasure
1
•Output remains
ON.
Indicator LED
remains ON.
•Output remains
OFF.
Indicator LED
remains OFF.
Incorrect pressure
setting
(1) Check the set pressure.
(2) Check the operation mode,
hysteresis and output type.
(hysteresis mode / window
comparator mode, normal /
reversed output)
(1) Reset the pressure
setting.
(2) Reset the function
settings.
Product failure
Replace the product.
2
Output remains
ON.
Indicator LED
works correctly.
Incorrect wiring
Check the wiring of the output line.
Check if the load is connected
directly to DC(+) or DC(-).
Correct the wiring.
Product failure
Replace the product.
3
Output remains
OFF.
Indicator LED
works correctly.
Incorrect wiring
Check the wiring of the output line.
Check if the load is connected
directly to DC(+) or DC(-).
Correct the wiring.
Unsuitable model
selection
Check if PNP is used when NPN
should have been selected, or the
other way around.
Review the selected model
(output type).
Broken lead wire
Check if there is bending stress
applied to any parts of the lead wire.
(bending radius and tensile force
applied).
Correct the wiring conditions.
(adjust the tensile force and
increase the bending radius).
Product failure
Replace the product.
4
Switch output
generates
chattering.
Incorrect wiring
Check the wiring.
Check that the brown and blue wires
are connected to DC(+) and DC(-)
respectively, and if the output wiring
is loose (contact failure).
Correct the wiring.
Incorrect settings
(1) Check the set pressure.
(2) Check that the hysteresis range
is not too narrow.
(3) Check the response time set at
initial setting.
Check that the response time is
not too short.
(1) Reset the pressure
setting.
(2) Increase the hysteresis.
(3) Reset the function
settings.
Product failure
Replace the product.
5
Slow switch
output response
Incorrect pressure
setting
Check the pressure setting.
Check that the detected pressure
and the set pressure value are not
the same or not too close.
Reset the pressure setting.
Set the pressure setting value
so it is not too close to the
detected pressure.