Mitsubishi Electronics QD75D, QD75P user manual Restrictions, Standing by OP address

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)The OPR retry function cannot be used in "stopper stop method 3)".

Precautions during operation

(1)If the zero signal is input before the workpiece stops at the stopper, the workpiece will stop at that position, and that position will become the OP.

At this time an error will not occur.

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
[ Md.31 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 Standing by		In OPR
Md.34 Movement amount Inconsistent		0
after near-point dog ON
Md.20 Current feed value
	Inconsistent	Value the machine moved is stored
Machine feed value

Standing by

OP address

Fig. 8.11 When the zero signal is input before the stop at the stopper

(2)When a machine OPR is stopped with the stop signal, perform a machine OPR again. If the restart command is turned ON after a stop with the stop signal, an error "OPR restart not possible" (error code: 209) occurs.

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