Eliminated from:
8400 StateLine, HighLine and TopLine: FW version >= 13.00.00.00
Response of the new version?
With the activation of QSP, the torque limitations nTorqueMotLimit and nTorqueGenLimit no longer act on the speed controller output in a limiting manner. For the QSP procedure, 100% torque are provided. Via C2865/1 MCTRL special settings bit13=TRUE, the torque limitation can be activated again.
Which products are affected?
Inverter Drives 8400 StateLine, HighLine, and TopLine up to the firmware version 12.01.00.00
What happens?
If quick stop is active, deceleration is not effected with the maximum possible torque (C57) although the ramp has been set with a corresponding steepness. The process takes longer than expected.
When does the problem occur?
The behaviour of the setpoint torque is limited to the limits LS_MotorInterface.nTorqueMotLim_a and nTorqueGenLim_a.
Diagnostics options?
With a quick stop deceleration time C105=0s, a deceleration with a 100%-torque during the process would be required (LS_MotorInterface.nInputTorqueCtrl_a=16384), even if LS_MotorInterface.nTorqueMotLim_a and nTorqueGenLim_a are written to with a torque of, for example, 1638 (10%). If this is not the case, the restriction is observable.
Short-term measures/recommendations?
For LS_MotorInterface.bQspActive=TRUE, the input values LS_MotorInterface.nTorqueMotLim_a and nTorqueGenLim_a should be switched over to 100%.
Evaluation:
For quick stop, a torque limitation is not expected. The process can take considerably longer than expected. If the torque limitations are changed depending on the process, the process behaviour varies depending on the activation time of QSP. This makes diagnostics more difficult. If the behaviour is detected, it can be remedied.
