Mitsubishi Electronics QD75D, QD75P Always limit the servomotor torque after, Set a value

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) In the "stopper method 1)", the OPR retry function is unusable.

Precautions during operation

(1) Set a value in the "

Pr.49

OPR dwell time" that is equal to or higher than the

movement time from the near-point dog ON to the time the machine presses against the stopper.

(2) The workpiece will continue decelerating and stop if the "

Pr.49

OPR dwell time"

elapses during deceleration from the " "Dwell time fault (error code: 205)".

Pr.46

OPR speed", thus causing an error

			V		Pr. 46 OPR speed
							Pr. 47 Creep speed
								Stops at stopper
									t
						" Pr.49 OPR
						dwell time" setting
				ON
Machine OPR start	OFF
(Positioning start signal)
				ON
OPR request flag	OFF
[ Md.31 Status : b3]
OPR complete flag		OFF
[ Md.31 Status : b4]
Axis operation status	Standing by			In OPR		In error
Md.34 Movement amount	Inconsistent			0
after near-point dog ON
Md.20 Current feed value
	Inconsistent			Value the machine moved is stored		Address at stop
Md.21 Machine feed value

Fig. 8.5 Operation when the dwell time elapses during deceleration from the OPR speed

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