Specifications

AP - 36 Applications Ver. 0002
AP.8 MOTOR STOP DUE TO TORQUE OVERLOAD
From software version 02.04 on, includes a new feature especially designed for spindle drives
although it is also available for axes.
It offers the possibility to detect that the motor has stopped when, for instance, the tool gets
stuck.
This detection triggers an Error message and it is handled by means of two new parameters.
Operation:
When the Drive detects that
the motor speed is below the threshold set by GP8 -F236-
and
the internal current command is near its maximum value (CP20 -F307-),
an internal timer starts running.
If the time elapsed under these conditions (torque overload condition) exceeds the time value
set by GP7 -F235-, error 203 is issued.
If the internal torque command drops below its maximum value or the motor speed is
resumed, the internal timer is reset back to zero.
Parameters:
GP7 O (F235) OverloadTimeLimit
Function: When the overload conditions exceed this time period, the error is issued.
Valid values: 0..10000 milliseconds. With GP7 =0 this protection is disabled.
Default value: 200
Version: Available from version 02.04 on.
GP8 O (F236) OverloadVelocityThreshold
Function: Sets the speed threshold under which the motor is considered to be stopped in
terms of overload detection.
Valid values: 0..1000 rpm
Default value: 100 (Asynchronous Motors), Rated Speed (Synchronous Motors).
Version: Available from version 02.04 on.
Generated Error message:
203 Torque overload error.
- The servo drive is locked up and it can not turn freely. Due to too high a torque, the turning speed has not
exceeded the GP8 value for a time period greater than the GP7 -F235- value.
Free the motor. If the error comes up for no apparent reason, increase the GP7 -F235- and/or GP8 -F236-
values. If GP7 is set to “0”, the error message is never issued.