12-2
12-1 Troubleshooting
OMNUC G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)
12
Troubleshooting and Maintenance
Precautions When a Problem Occurs
When checking and verifying I/O after a problem has occurred, the Servo Drive may suddenly
start to operate or suddenly stop, so always take the following precautions.
You should assume that anything not described in this manual is not possible with this product.
Precautions
 Disconnect the wiring before checking for cable breakage. If you test conduction with the cable
connected, test results may not be accurate due to conduction via bypassing circuit.
 If the encoder signal is lost, the motor may run away, or an error may occur. Be sure to disconnect
the motor from the mechanical system before checking the encoder signal.
 When measuring the encoder output, perform the measurement based on the GND (CN1 pin 16).
When an oscilloscope is used for measurement, it will not be affected by noise if measurements
are performed using the differential between CH1 and CH2.
 When performing tests, first check that there are no persons in the vicinity of the equipment, and
that the equipment will not be damaged even if the motor runs away. Before performing the tests,
verify that you can immediately stop the machine using an immediate stop in case the machine
runs out of control.
Replacing the Servomotor or Servo Drive
Use the following procedure to replace the Servomotor or Servo Drive.
Replacing the Servomotor
1. Replace the motor.
2. Perform origin adjustment (for position control).
 When the motor is replaced, the motor's origin position (phase Z) may deviate, so origin
adjustment must be performed.
 Refer to the position controller's manual for details on performing origin adjustment.
3. Set up the absolute encoder.
 If a motor with an absolute encoder is used, the absolute value data in the absolute encoder is
cleared when the motor is replaced, so setup is again required. The multi-rotation data will be
different from before it was replaced, so initialize the Motion Control Unit settings.
 For details, refer to Absolute Encoder Setup on page 10-6.
To Next Page
Loading...
Need help?
General
