i950 ES: With resolver the safe reference position SHOM is not maintained after power on (corrected from V01.06.04)
Fixed from:
i950 Servo inverter FW: from V01.06.04.2154
Response of the new version:
The servo inverter transmits a correctly reconstructed value to the Extended Safety after switching on the mains. This is the prerequisite for the Extended Safety to correctly calculate and plausibilise the safe reference (SHOM) after switching on the mains. Independent of the encoder system (resolver, encoder), the safe reference is now stored and reconstructed in a power-failure-proof manner.
What happens?
i950 ES: After power-on the safe reference position SHOM is lost because a position deviation is detected after power-on. The actual position transmitted from the basic unit (i950 FW) to the safety module after power-on is a modulo numerical value limited to one motor revolution and does not contain the information about the number of complete motor revolutions. A position difference is thus detected when comparing positions in the safety module.
When does the behaviour occur?
Power switching when using a resolver as feedback system and the actual position (incremental "grey" encoder position) is actually on a numerical value, larger than the usual module range of +/- half a motor revolution (+/- 32767 inkr).
