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2.7
2.7.6
Error Handling
Error message ’Regenerative overload’
Message no. / Message
4 / ’Regenerative overload’
Type / Motor action
Unrecoverable error / Motor is set in passive mode.
Error condition
The amount of power dissipated in the motors built-in power
dump (breaking) resistor is above safe limit.
This error is tripped if the ’Regenerative load’ is >99%.
The regenerative load value can be monitored in the ’Motor status field’.
Possible cause of this error
The returned amount of energy from the motor has been too
high. This can typically happen if:
- The motor decelerate a large load inertia too fast.
- The motor is forced backwards.
- The servo filter or ’Load’ parameter is not adjusted to a stable
motor operation and the motor tends to oscillate causing energy to flow forward and backward from/to the motor.
In all situations the motor will start to work as a generator that
generate energy backward into the drive electronics.
Solutions to avoid error
- Decrease the load inertia.
- Decrease the top speed and/or the acceleration value.
- Make sure that the supply voltage is within nominal range in
order to leave extra capacity at the internal capacitors.
How to return to normal
operation
- Reset the motor, clear the error bit(s) in register 35 or cycle the
power.
Error bit / Firmware name
Bit 3 / ’UIT_ERR’
Error message 5, 6 and 7 do not exist since bits are used for other status purposes.
2.7.7
Error message ’Position Limit Exceeded’
Message no. / Message
8 / ’Position Limit Exceeded’
Type / Motor action
Unrecoverable error / Motor is set in passive mode.
Error condition
The actual position of the motor is outside the value(s) specified
in the ’position limit min.’ or ’position limit max.’ specified in the
’error handling’ area of the main tab in MacTalk.
Possible cause of this error
The motor has been commanded outside the value(s) specified in
the ’position limit min.’ or ’position limit max.’ registers.
Be aware that the error can happen even if the motor is in passive mode and the motor is forced outside this range.
Solutions to avoid error
- Set the position limits descriped above to more realistic values.
- Make sure that the position limits also cover worst case situations such as position overshot (if using a soft filter).
How to return to normal
operation
- Reset the motor, clear the error bit(s) in register 35 or cycle the
power.
Error bit / Firmware name
Bit 7 / ’PLIM_ERR’
JVL Industri Elektronik A/S - User Manual - Integrated Servo Motors MAC050 - 800
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