Corrected from:
- Inverter Drives 8400 StateLine V15.01.00
- Inverter Drives 8400 HighLine V15.01.00
- Inverter Drives 8400 TopLine V15.01.00
Response of the new version:
The setpoints at the MCK output and in the motor control are synchronous and increment-precise.
Which products are affected?
Inverter Drives 8400 StateLine, HighLine, and TopLine up to the firmware version 12.01.00.00
What happens?
A position or angular difference follower based on the MCK setpoints for the position and/or speed is noticeable after several QSP processes by the master by an angular offset to the master.
When does the problem occur?
The nSpeedSet_v angular difference signal and the dnPosSet_p set position at LS_MotionControlKernel, in the case of a QSP process do not map the setpoints in an increment-precise fashion, which are used for the speed and position controller in the motor control.
If these setpoints are used for an electrical shaft application, the described angular offset between the master and slave occurs.
Diagnostics options?
Comparison of the integrated set speed nSpeedSet_v and the integrated actual speed LS_MotorInterface.nMotorSpeedAct_v after a compensated following error at standstill after a QPS process. The integrators must be loaded with zero with bQSPActive=FALSE/TRUE.
Short-term measures/recommendations?
None. The QSP at the master of an electrical shaft application must be avoided if the setpoints mentioned are used. For this, compare the solution in the standardised 'Electrical shaft (8400TopLine)' application.
Evaluation:
The behaviour will typically only be noticed after a longer operating time, because usually an interfering angular offset between the master and slave has only built up after numerous QSP processes. The error only contains few increments for each QSP.
