User manual

16 Troubleshooting and remedial actions
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16 Troubleshooting and remedial actions
During motor operation, the motor or driver may fail to function properly due to an improper speed setting or
wiring. When the motor cannot be operated correctly, refer to the contents provided in this section and take
appropriate action. If the problem persists, contact your nearest office.
Phenomenon Possible cause Remedial action
The S-ON input is turned OFF.
∗1∗2
• Turn the S-ON input ON and confirm that the
motor will be excited.
• Check the setting of the application parameter
for S-ON signal logic [APP-1-00].
The TL input was turned ON when the
torque limit value was set to 0%.
• Set an appropriate torque limit value.
• Keep the TL input OFF when the torque limit
value is set to 0%.
• The motor is not excited.
• The motor can be moved
by hand.
The FREE input is turned ON. Turn the FREE input OFF.
The BRAKE input is turned OFF.
∗3
• Turn the BRAKE input ON.
• Check the setting of the application parameter
for BRAKE signal logic [APP-1-01].
The CLR input is turned ON.
∗1
Turn the CLR input OFF.
The CW input or CCW input is not
connected properly.
• Check the connection between the controller
and driver.
• Check the pulse signal specifications (voltage,
width).
∗1
The CW input and CCW input are turned
ON simultaneously in the 2-pulse input
mode.
∗1
Each pulse signal input should specify either the
CW input or CCW input, but not both. Make sure
the terminal not receiving the signal input remains
OFF.
The pulse signal is connected to DIR input
in the 1-pulse input mode.
∗1
Connect the pulse signal to the PLS input.
The VL input was turned ON when the
speed limit value was set to 0 r/min.
∗4
Set an appropriate speed limit value.
The motor does not
operate.
An electromagnetic brake motor is used
and the electromagnetic brake is not
released.
Connect a 24 VDC power supply to the CN1 input
terminal for 24 VDC power supply.
The CW input and CCW input are
connected in reverse in the 2-pulse input
mode.
∗1
Connect CW pulse signals via the CW input, and
connect CCW pulse signals via the CCW input.
The DIR input is set in reverse in the
1-pulse input mode.
∗1
Turn the DIR input ON to cause the motor to
rotate in CW direction, and turn the input OFF to
cause the motor to rotate in CCW direction.
The motor rotates in the
direction opposite to the
specified direction.
The system parameter for motor rotation
direction [SyS-1-06] is set wrongly.
Check the setting of the motor rotation direction
parameter [SyS-1-06].
Motor operation is
unstable.
Pulse signals are not connected
properly.
∗1
• Check the connection between the controller
and driver.
• Check the pulse signal specifications (voltage,
width).
The electromagnetic brake
does not hold the load.
The FREE input is turned ON. Turn the FREE input OFF.
The electromagnetic brake
is not released.
24 VDC power is not input. Connect a 24 VDC power supply to the CN1 input
terminal for 24 VDC power supply.
∗1 In the position control mode.
∗2 In the speed control mode when the system parameter for operation selection after stopping in speed control
mode [SyS-1-02] is set to “Servo lock.”
∗3 In the speed control mode.
∗4 In the torque control mode or tension control mode.
Note
I/O signals can be monitored using the data setter OPX-2A or the data setting software
MEXE02. Use these options to check the wiring conditions of I/O signals.