Eliminated from:
9400 HighLine SW V02.00.05.00
Behaviour of the new version?
The touch probe evaluation has been corrected so that increased deviations cannot occur anymore during signal detection.
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Which products are affected?
9400 HighLine SW ≤ V01.51.01.00
What happens?
The touch probe evaluation at the digital frequency input DF-IN (digital frequency extension module) and/or at the encoder input (terminal X8) may deviate by ± 2 ms.
Consequently, this results in a corresponding phase difference (which depends on the speed of the digital frequency signal or the speed of the motor) to the position value which actually occurred in relation to the touch probe event.
When does the problem occur?
Applications with master value or master angle transfer via digital frequency module and zero pulse correction of the digital frequency signal.
Applications with actual position correction via the zero pulse of an encoder as a feedback system.
Possible diagnostics?
Parallel evaluation of the zero pulse at the system block LS_DigitalFrequencyInput and of a sensor via the touch probe function of the input terminals LS_TouchProbe1…8
Comparison of the phase difference measured in each case.
The description of the function blocks can be found in the Software Manual.
Short-term measures/recommendations?
Use Lenze technology applications (TAs). Touch probe evaluation via the digital input terminals is implemented in the TAs.
When creating your own applications, do not use the zero tracks at the DF-IN and at the encoder input as the touch probe source.
Evaluation
The function of the zero pulse synchronisation can be simulated via the terminals.
Depending on the requirements of the particular application, this may result in more work during the design and creation of the application, which needs to be factored into the planning accordingly.
Published with Service Message No. 42/2006
