Mitsubishi Electric MELSEC-L LD75P User Manual page 149

(7) [Pr.48] OPR retry
Set whether to carry out OPR retry.
When the OPR retry function is validated and the machine OPR is started, first the axis will move in the OPR
direction (1)). If the upper/lower limit signal turns OFF before the near-point dog signal ON is detected (2)), the
axis will decelerate to a stop, and then will move in the direction opposite to the specified OPR direction (3)). If
the falling edge of the near-point dog signal is detected during movement in the opposite direction, the axis will
decelerate to a stop (4)), and will carry out machine OPR again (5)), (6)).
5)
4)
Near-point dog signal
Zero signal
[Operation for OPR retry function]
1) Movement in the OPR direction starts with the machine OPR start.
2) The axis decelerates when the limit signal OFF is detected.
3) After stopping at detection of the limit switch signal OFF, the axis moves at the OPR speed in the
direction opposite to the specified OPR direction.
4) The axis decelerates when the near-point dog signal turns OFF.
5) After stopping with the near-point dog signal OFF, start machine OPR in the OPR direction.
6) The machine begins decelerating when the near-point dog ON is detected and completes machine
ORR.
6)
ON
CHAPTER 5 DATA USED FOR POSITIONING CONTROL
1)
2)
Start position
3)
Limit signal OFF state
5
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