Mitsubishi Electronics QD75P, QD75D OPR speed Pr Creep speed, Status b3 OPR complete flag

8 OPR CONTROL

MELSEC-Q

Restrictions

(1) Always limit the servomotor torque after the "

Pr.47

Creep speed" is reached. If the

torque is not limited, the servomotor may fail when the machine presses against the stopper. (Refer to Section 12.4.2 "Torque limit function".)

(2)Use an external input signal as the zero signal.

(3)In the "stopper method 2)", the OPR retry function is unusable.

Precautions during operation

(1)Input a zero signal from an external source after the machine presses against the stopper.

The workpiece will continue decelerating and stop if a zero signal is input before

deceleration to the "

Pr.47

Creep speed". An error "OP detection timing fault (error

code: 204)" will occur after the machine stops.

(2) The near-point dog must be turned ON until it presses against the stopper.

			V	OPR speed
					Pr. 47 Creep speed
					Stops at stopper
					t
				Zero signal
				ON
				Near-point dog OFF
				ON
Machine OPR start		OFF
(Positioning start signal)
			ON
OPR request flag		OFF
[	Status : b3]
OPR complete flag		OFF
	Status : b4]
Md.	Axis operation status	Standing by		In OPR	In error
	Movement amount	Inconsistent		0
after near-point dog ON
Md.20 Current feed value		Inconsistent		Value the machine moved is stored	Address at stop
	Machine feed value

Fig. 8.8 Operation when a zero signal is input before the creep speed is reached

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