SMC Networks D-M9 E Series, Operation Manual

Page: 19 / 28

-18-
No.D-
※
S-OMJ0004-E
Trouble
No.
Trouble Possible cause
Investigation to find possible
cause
Countermeasure
5
The switch
output doesn’t
turn on. The
operation LED
operates
properly.
Mismatch the
load current
specification
(2-wire)
Satisfaction of the following
relations by the load current
specification
Load voltage is "ON" level
> Load voltage - (Internal
voltage drop x n)
n: The number of series
connecting switches
Select 3-wire Auto switch or reed
Auto switch.
Reduce the number of switches.
Incorrect wiring
(output line)
(3-wire) Condition of connected part
(connector contact pin and
crimping terminal)
Correct wiring. (Perform wiring of
connected part again.)
Breakage of
lead wire (black)
(3-wire)
The presence of repeated
bending stress to a part of lead
wire
(bending radius, tensile force to
the lead wire)
Correct wiring.
(Adjust tensile force and enlarge
bending radius.)
6
The operation is
unstable.
(chattering)
Improper setting
(mounting)
position
Detection close to the limit of
switch operating angle
Move the switch to proper
position (near the center of the
switch operating angle).
Displacement
from set position Looseness of the switch unit or
switch mounting screw
Fix to proper position at
appropriate torque. (Tightening
torque: 0.05 to 0.15 Nm)
Incorrect wiring
Condition of connected part
(connector contact pin and
crimping terminal)
Correct wiring. (Perform wiring of
connected part again.)
Check if the load has a short
circuit (not connected).
Correct wiring.
(Refer to "Internal circuit" on
page
13 .)
Breakage of
lead wire
The presence of repeated
bending stress to a part of lead
wire
(bending radius, tensile force to
the lead wire)
Correct wiring.
(Adjust tensile force and enlarge
bending radius.)
Malfunction due
to disturbance
magnetic field
The presence of magnetic field
source near the actuator
(cylinder, electric welding
machine conductor, motor,
magnet etc.) Place a magnetic shield plate
between magnetic field source
and the actuator, or separate
magnetic field source from the
actuator.
The switch
operates at
multiple points. Malfunction due
to disturbance
magnetic field
The effect of magnetic field
generated by adjacent actuator Place a magnetic shield plate to
the actuator.
The load doesn’t
work.
Operating angle
range
Detection at
intermediate
position
Satisfaction of the following
relations by the actuator rotation
speed
Load operating time [s]
< Auto switch operating range
[mm] / Actuation operating
speed [mm/s]
Decrease the actuating driving
speed until specified relations
can be satisfied.