MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D - Manual (Page 291)

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MELSEC-Q
8 OPR CONTROL
(3) If the zero signal is input before the workpiece stops at the stopper, the workpiece
will stop at that position, and that position will be regarded as the OP.
t
ON
OFF
ON
OFF
OFF
ON
V
ON
Zero signal
0
Torque limit
Valid torque limit range
Pr. 47 Creep speed
Pr. 46 OPR speed
Near-point dog OFF
Machine OPR start
(Positioning start signal)
Deviation counter clear output
Md.26 Axis operation status Standing by
Inconsistent
Value the machine moved is stored
OPR request flag
[ Md.31 Status : b3]
OPR complete flag
[ Md.31 Status : b4]
Md.34 Movement amount
after near-point dog ON
Md.20 Current feed value
Md.21 Machine feed value
Standing by
OP address Inconsistent
In OPR
Stops at stopper
Pr.55 Deviation counter clear signal
output time
Fig. 8.9 Operation when the zero signal is input before the stop at the stopper
(4) Machine OPR started while the near-point dog is ON will start at the " Pr.47 Creep
speed".
(5) When a machine OPR is stopped with the stop signal, perform a machine OPR again.
If the restart command is turned ON after a stop with the stop signal, an error "OPR
restart not possible" (error code: 209) occurs.