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-34-
JXC
※
-OMX0018
Problem
Possible
cause
Investigation method and location of
possible cause
Countermeasure
Operation
stops
intermittently
Alarm
generated
Check if the controller has generated an
alarm? Check the type of alarm.
If it is, check the type of alarm referring to
the controller operation manual, and take
countermeasures in accordance with the
manual.
Refer to the Operation Manual and take
appropriate measures.
Incorrect
wiring
Is the wiring connected correctly?
Check if the controller is wired correctly, if
there are no broken wires or short circuits
with reference to the controller operation
manual.
Correct the wiring and confirm that the
input/output of each signal is correct.
Separate the power supply for the CN1
controller and the CN5 I/O signal power
supply.
Electrical
noise
Connect to Ground correctly.
Avoid bundling the cables.
Refer to the Operation Manual and take
appropriate measures.
Influence of
a magnetic
force
Check if there is equipment which
generates a magnetic force, such as a
magnet or electro-magnetic coil around the
actuator.
The equipment, which generates the
magnetic force, should be kept away from
the motor.
For example, keep 40 mm minimum
distance from the cylinder with auto switch.
Incorrect
parameters
Check that the parameter values are
correct.
Reconfirm if an appropriate controller is
used for the actuator.
Modify the values of the parameters and test
the operation.
Voltage
drop
Check for a temporary voltage drop in the
power supply?
(If there is a temporary voltage drop in the
power supply, the EMG terminal of CN1
power connector will turn OFF so the
actuator will stop. However, this stop will
be released when the voltage recovers).
There is a possibility of a momentary
voltage drop because the capacity of the
power supply is insufficient, or if the power
supply has
“inrush-current protection”.
Pushing
operation
Check during a pushing operation that the
INP output signal is turning on.
(On completion of the pushing operation
the output INP signal is generated, the
PLC cannot confirm the completion of
driving).
If the controller version is below SV1.00, the
pushing force is reduced when the energy
saving mode is turned on. If the pushing
force is reduced to a value less than the
value in step data
“trigger LV” the INP output
signal is turned off.
Check the INP output signal before the
energy saving mode is turned on.
Unsuitable
specification
Check if the controller specifications are
appropriate, the power supply is suitable
and the controller is compatible with the
actuator.
If a blank controller is used, check that the
written data is identical with the actuator
used.
Check that the product number of the
actuator used matches with the actuator
which is applicable to the controller before
use.
If a blank controller is used, write the data,
which is identical with the product number of
the actuator used.
Signal
timing
Check the timing of the signal from the
PLC to the controller.
Leave a minimum interval of 15 ms
(recommendation is 30 ms) between input
signals and maintain the state of the signal
for a minimum of 15 ms (recommendation is
30 ms), because PLC processing delays
and controller scanning delays can occur.