Mitsubishi MELSEC-Q QD77MS, User Manual

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Chapter 8 OPR Control
(6) When the zero signal is detected again during deceleration ( 4) of Fig. 8.12)
with detection of zero signal, the operation stops at the zero signal detected
lastly to complete the OPR.
V
Zero signal
Near-point dog
1)
Pr.47 Creep speed
OPR direction Pr.44
Pr.46 OPR speed
ON
2)
3)
OFF
5)
6)
4)
Fig. 8.12 Operation when the zero signal is detected again during deceleration with detection of zero
signal
(7) Do not use the scale origin signal detection method OPR for the machine with
the backlash.
(8) When using the direct drive motor, make it passed the Z phase once before
reaching 3) of Fig. 8.10.