The electric
actuator does
not move at all.
Check if you can hear the sound
of lock release when the manual
lock switch is turned on and off.
If there is no sound of lock release
from the electric actuator with lock, the
lock may be broken. If the trouble
continues, please contact SMC.
Check that the PLC connected
to the controller operates
correctly.
Check the operation by test run using
the controller setting software, etc.
If the electric actuator is operated, a
signal output from the PLC is
suspected.
Take appropriate measures by
referring to the Operation Manual for
the controller.
→ 6.3 The parallel I/O signal is
detailed
Inappropriate
specifications
Check that the combination of
the electric actuator and
controller is correct?
Check if the product number of the
used the electric actuator matches with
the electric actuator which is
applicable to the controller.
→ 3. Product Specifications
If the blank controller is used, write the
data, which is identical with the
product number of the actuator used.
Influence of a
magnetic
force
Check if there is equipment
which generates the 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.
If it is not energized, the servo
will be OFF and does not
operate. Check if a voltage of 24
VDC is applied to the EMG
terminal.
Apply 24 VDC to the EMG terminal.
Is the wiring connected
correctly?
Check if the wiring is connected
correctly or if there is broken wire or
short-circuit by referring to this
Operation Manual. Correct the wiring
and check that the input/output of each
signal is correct.
Separate the power supply for the
controller and the I/O signal power
supply.
→ 4. External Wiring Diagram
→ 6.4 Parallel I/O Wiring Example
Counter-
measures
against noise
Check that the Grounding is
connected correctly?
Are power cables for other
equipment and controller cables
bundled together?
Connect to Ground correctly.
Avoid bundling the cables with power
cables of other equipment.
Take appropriate measures by
referring to the Operation Manual for
the controller.
→ 3.4 How to install
Check that the parameter values
are correct.
Check the combination of the electric
actuator and controller. Modify the
parameters accordingly and check the
operation.
→ 7. Setting Data Entry
Check if there has been any
temporary voltage drop in the
power supply.
(If there is a temporary voltage
drop in the power supply, the
EMG terminal of PWR power
connector will turn OFF so the
electric 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 the
power supply has inrush current
restraining specification.
→ 3. Product Specifications