Which products are affected?
9300EP servo positioning controller version V2.1
What happens?
After manual positioning it is possibly moved to an incorrect destination in case of a subsequent relative positioning.
When does the problem occur?
After manual positioning there was a move to an incorrect destination in subsequent relative positioning if, in order to terminate the manual positioning, the manual positioning signal 'POS-MANU-xxx' and the signal 'POS-MANUAL' had been reset simultaneously for manual mode.
Now POS-MANUAL can also be reset simultaneously with the manual positioning signal.
Possible diagnostics?
Display of the current position destination under C1220/1 retains the maximum value after manual positioning, which is only defined temporarily for manual positioning.
Short-term measures/recommendations?
Only switch back to program mode after a delay (POS-MANUAL-POS = Low). It is sufficient to provide an OFF delay of one cycle (1ms) in order to avoid the response. Use of DIGDEL in the 9300 or delayed actuation via the PLC.
Evaluation:
The simultaneous switching of MANUAL and MANU-POS or MANU-NEG does not really correspond to the logical response in manual positioning/jog. Normally the direction signal 'MANU-POS' is reset first; the drive then decelerates to a standstill and only now is there a switch back to program mode.
