BECKHOFF AL2000 Linear servomotor - Manual (Page 49)

Commissioning
10.3 Troubleshooting
The following table is to be seen as a “First Aid” box. There can be a large number of different reasons for a
fault, depending on the particular conditions in your system. The fault causes described below are mostly
those which directly influence the motor. Peculiarities which show up in the control behaviour can usually be
traced back to an error in the parameterisation of the servo drives. Information about this can be found in the
documentation for the servo drives and the commissioning software.
For multi­axis systems there may be further hidden reasons for faults.
Our applications department can give you further help with your problems.
Error Possible cause Measures to remove the cause
of the fault
Motor does not move • Servo drive not enabled
• Break in setpoint lead
• Motor phases in wrong se­
quence
• Brake not released
• Drive is mechanically blocked
• Apply ENABLE signal
• Check setpoint lead
• Correct the phase sequence
• Check brake control
• Check mechanism
Motor runs away • Motor phases in wrong se­
quence
• Correct the phase sequence
Motor oscillates • Break in the shielding of the
feedback cable
• Amplification to high
• Replace the feedback cable
• Use the motor default values
Error message: brake • Short­circuit in the supply
voltage lead to the motor
holding brake
• Voltage too low
• Faulty motor holding brake
• Eliminate short­circuit
• Increase the voltage
• Replace the motor brake
Error message: output stage fault • Motor cable has short circuit
or earth leakage
• Motor has short circuit or
earth leakage
• Replace motor cable
• Replace motor
Error message: feedback • Connector is not properly
plugged in
• Break in cable, cable crushed
or similar
• Internal error
• Check the plug connector
• Check cables
• Read out the error messages
Brake does not grip • Required holding torque too
high
• Brake faulty
• Check the design
• Replace the motor brake
Linear servomotor AL2xxx 49 Version 4.0