SMC Networks D-MP Series, Operation Manual, Page: 27 / 32

-26-
No.D-
※
S-OMU0002-A
Trouble
No.
Problem Possible cause Investigation method Countermeasures
4
The output does
not turn on
The operation
LED operates
correctly
Incorrect wiring Check the output wiring. Correct the wiring
Breakage of lead
wire
Check the repeated bending
stress/tension applied to a part
of the lead wire. Correct the wiring
(Correct the tensile force and
enlarge the bending radius).
Position sensor
failure
Replace the product.
5
Indicator LED 1
flashes
Blue LED flashes
Excess current
was applied to the
output
Check if 40 mA or more of
current is applied to the output
or load is short circuited.
Connect the specified load
Orange LED
flashes
Inadequate
magnetic force (1) Incorrect selection of an
actuator
(2) Loose sensor bracket or
mounting screw
(1) Select the actuator again
(2) Move the cylinder for full
stroke after mounting the
sensor at the appropriate
position with the specified
torque.
Position sensor
failure
Replace the product.
6
Analogue output
error
(not satisfy the
specification)
Warming up
inadequate
Check if the product satisfies
the specified accuracy 10 to 15
minutes after supplying power. Output will drift after the power
was supplied. Wait for 10 to
15 minutes for warming up.
Incorrect wiring
and incorrect load
specification Check if a correct load is
connected to the analogue
output.
Correct the wiring
Incorrect mounting,
displacement
Check for looseness of the
position sensor mounting bracket
and the mounting screws.
Apply the appropriate torque
Rotation of
cylinder piston rod
Check the rotation of piston rod
Arrange rotation stopping
method
Movement of the
base Check if the brackets or screws
are loose
Fix the brackets and screws
Influence by the
magnetic
substance Magnetic materials such as
brackets or screws are mounted
close to the sensor.
Non-magnetic materials are
to be used
Magnetization or
demagnetization
of the screws or
base due to
welding
Check the operating
environment.
Not applicable in welding
environment or where stroke
magnetic force is generated.
Change the screws or base to
non-magnetic materials.
Influence by
magnetic field
disturbance Check for the effect of a
magnetic field generated by an
adjacent actuator.
Increase the interval between
actuators.
Change the mounting surface
of the position sensor.
During IO-Link
communication
Check if green LED flashes
Analogue output is disabled
when IO-Link is selected.
Position sensor
failure
Replace the product.