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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 PLC program
Default
value
Axis 1 Axis 2 Axis 3 Axis 4
0 : Near-point dog method 0
4 : Count method 1) 4
5 : Count method 2) 5
Pr.43
OPR method
6 : Data set method 6
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.
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.
6 : Data set method................... The position where the machine OPR has been
made will be the OP.
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 after the near-point dog turned OFF,
machine OPR is completed.
Note) After the home position return (OPR) has been
started, the zero point of the encoder must be passed
at least once before point A is reached.
However, if selecting "1: It is not necessary to pass
through the Z phase after the power on." with "
Pr.180
Function selection C-4", it is possible to
carried out the home position return (OPR).
A
t
V
ON
(1)
(2)
(3)
(4)
Near-point dog OFF
Zero signal
Pr.47
Creep speed
OPR speed
Pr.46