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•Cross-reference for troubleshooting
Trouble
Trouble
No.
The switch
output doesn't
1
turn off. The
operation LED
doesn't go off.
The switch
output doesn't
2
turn off. The
operation LED
doesn't turn on.
The switch
output doesn't
turn off. The
3
operation LED
operates
properly.
The switch
output doesn't
4
turn on. The
operation LED
doesn't turn on.
Possible cause Investigation to find possible cause
Malfunction due
The effect of magnetic field
to disturbance
generated by adjacent cylinder.
magnetic field
Improper setting
The presence of the following
(mounting)
conditions.
position
Switch operating range
> Actuator operating stroke
∗: Narrow angle
Check if the switch wiring
Wiring failure
connection is reversed
(2-wire type)
(Brown/Blue).
Satisfaction of the following
relations by the load current
specification.
Mismatch the
Load voltage is "ON" level
load current
> (Current leakage x n)
specification
x load resistance or Load
(2-wire)
current is "OFF" level
> (Current leakage x n)
n: The number of parallel
connecting switches
Abnormal
Check the source voltage.
power source
(Zero or very low)
Voltage applied to switch
Wiring failure
(load voltage).
Incorrect setting
Check if detection is made close to
(mounting)
the operation range limit.
position
Set position
Loose set bracket or set screw.
displacement
Stop position
Check if the stroke stop position is
displacement of
Inconsistent.
the piston
Presence of magnetic field
generating source around the
cylinder.
Decrease of
(Electric welding machine
Detected
conductor/ Strong magnet)
magnetic field
Influence of magnetic field of
(demagnetization)
adjacent cylinder (20 mm or less).
Presence of magnetic material
(chip) piled up on the cylinder.
Presence of repeated bending
Lead wire
stress to one point of the lead wire.
disconnected
(Bend radius/Tensile force to lead
wire)
Place a magnetic shield plate to the
cylinder.
Displace the switch set position from
the center of the actuator operating
range.
Correct wiring.
(Refer to "Internal circuit" on page 11.)
Reduce the number of switches.
Set the source voltage to specified
voltage.
(Refer to "Specifications (power voltage
and load voltage)" on page 15.)
Correct wiring.
(Refer to "Internal circuit" on page 11.)
Correct the position.
(Center of operation range)
Fix at the right position with right torque.
Tightening torque: 0.05 to 0.1 N•m
Stabilize stop position.
(Correction of displacement/cushion)
Use the shield between magnetic field
generating source and cylinder.
Keeps cylinder away (40 mm or more).
Use magnetic shielding.
Remove piled up magnetic material.
Correct wiring.
(Correct tensile force/increase bend
radius)
-13-
Countermeasure
No.D-※S-OMZ0004
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