Mitsubishi Electronics QD75P OPR method 4 Stopper method, Machine moves at, OPR direction. Torque

8 OPR CONTROL

8.2.6 OPR method (4): Stopper method 3)

MELSEC-Q

The following shows an operation outline of the "stopper method 3)" OPR method.

The "stopper method 3)" method is effective when a near-point dog has not been installed. (Note that the operation is carried out from the start at the " Pr.47 Creep speed", so it will

take some time until the machine OPR completion.)

Operation chart

	The machine OPR is started.
	(The machine moves at the "		Creep speed", in the direction designated in "				OPR direction". Torque
1)		Pr.47				Pr.44
	limiting is required at this time. If the torque is not limited, the servomotor may fail when the machine presses against
	the stopper in step 2.)
	The machine presses against the stopper at the "				Creep speed" and stops.
2)				Pr.47
	The pulse output from the QD75 will stop at the zero signal after the machine stops, outputting the "deviation counter

3)clear output" to the drive unit.

4)

(A "deviation counter clear signal output time" is set in the Pr.55 .)

After a "deviation counter clear output" is output to the drive unit, the OPR complete flag ( Md.31 Status: b4) turns

from OFF to ON, and the OPR request flag ( Md.31 Status: b3) turns from ON to OFF.

V

Pr. 47 Creep speed

Stops at stopper

t

Zero signal

		Valid torque limit range
Torque limit
		ON
Machine OPR start		OFF
(Positioning start signal)
		ON
OPR request flag		OFF
[	Status : b3]
		ON
OPR complete flag		OFF
[ Md.31 Status : b4]

Deviation counter clear output	Pr.55 Deviation counter clear signal
		output time

Md.26 Axis operation status

Movement amount after near-point dog ON

Current feed value Md.21 Machine feed value

Standing by In OPR Standing by

Inconsistent 0

InconsistentValue the machine moved is stored OP address

Fig. 8.10 Stopper method 3) machine OPR

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