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MELSEC-Q
5 DATA USED FOR POSITIONING CONTROL
5.2.5 OPR basic parameters
Setting value, setting range
Setting value buffer memory
address
Item
Value set with peripheral device
Value set with sequence
program
Default
value
Axis 1 Axis 2 Axis 3 Axis 4
0 : Near-point dog method 0
1 : Stopper method 1) 1
2 : Stopper method 2) 2
3 : Stopper method 3) 3
4 : Count method 1) 4
Pr.43
OPR method
5 : Count method 2) 5
0 70 220 370 520
Pr.43
OPR method
Set the "OPR method" for carrying out machine OPR.
0 : Near-point dog method ........ After decelerating at the near-point dog ON, stop
at the zero signal and complete the machine
OPR.
1 : Stopper method 1) ............... After decelerating at the near-point dog ON, stop
with the stopper, and complete the machine OPR
after the dwell time has passed.
2 : Stopper method 2) ............... After decelerating at the near-point dog ON, stop
with the stopper, and complete the machine OPR
with the zero signal.
3 : Stopper method 3) ............... After starting with the creep speed, stop with the
stopper, and complete the machine OPR with the
zero signal.
4 : Count method 1) .................. After decelerating at the near-point dog ON, move
the designated distance, and complete the
machine OPR with the zero signal.
5 : Count method 2) .................. After decelerating at the near-point dog ON, move
the designated distance, and complete the
machine OPR.
Note) Refer to Section 8.2.2 "Machine OPR method" for details on the OPR
methods.
OPR method
0 : Near-point dog method
(1) Start machine OPR.
(Start movement at the "
Pr.46
OPR speed" in the
"
Pr.44
OPR direction".)
(2) Detect the near-point dog ON, and start deceleration.
(3) Decelerate to "
Pr.47
Creep speed", and move with the
creep speed.
(At this time, the near-point dog must be ON. If the near-
point dog is OFF, the axis will decelerate to a stop.)
(4) At the first zero signal (one pulse output at one motor
revolution) after the near-point dog OFF, the pulse output
from the QD75 stops, and the machine OPR is completed.
t
V
ON
(1)
(2)
(3)
(4)
Near-point dog OFF
Zero signal
OPR speed
Pr.46
Pr.47
Creep speed