Corrected from:
Firmware version 21.00.00.00 fixes this behavior.
Response of the new version:
The zero pulse is only generated at the resolver zero position.
_____________________________________________________________________________________________________________________________________________________________________________________
Which products are affected?
Inverter Drives 8400 TopLine with a firmware version 12.01.00.00
What happens?
At the digital frequency output, an unexpected zero pulse is output, which does not correspond to the resolver zero position.
When does the problem occur?
In the case of the '5:Resolver' selection of parameter C540, LS_DFOut function, when the motor with the resolver starts to rotate for the first time after mains switching (incl. control card supply). Or if the DFOut function is changed to '5:Resolver' with a starting rotary motion.
Diagnostics options?
The zero pulse can be measured at the multi-encoder interface X8 pin 8=Z, pin 15=Z\ using a classic oscilloscope. It shows that, at the same speed, the first pulse is not equidistant in time to the following pulses.
Short-term measures/recommendations?
None. The first zero pulse after mains switching and change of the DFOut function to '5:Resolver' must not be used for homing and/or synchronisation.
Evaluation:
The use of the first zero pulse for homing or a mark synchronisation causes an incorrect alignment in the slave drive.
The behaviour in typical tests in master-slave applications may possibly not be detected.
