Mitsubishi Electric MELSEC-L LD75P User Manual page 143

(b) 1: Stopper method 1)
V Pr.46
1.
Near-point dog
1.
Start machine OPR. (Start movement at the "[Pr.46] OPR speed" in the "[Pr.44] OPR direction".)
2.
The machine begins decelerating when the near-point dog ON is detected.
3.
The machine decelerates to the "[Pr.47] Creep speed", and subsequently moves at that speed. (At
this time "[Pr.54] OPR torque limit value" is required. If the torque is not limited, the servomotor
could be damaged in step 4.)
4.
The machine contacts against the stopper at "[Pr.47] Creep speed", and then stops.
5.
When the near-point dog turns ON and the "[Pr.49] OPR dwell time" is passed, the pulse output
from the LD75 stops, and the machine OPR is completed.
(c) 2: Stopper method 2)
1.
Start machine OPR. (Start movement at the "[Pr.46] OPR speed" in the "[Pr.44] OPR direction".)
2.
The machine begins decelerating when the near-point dog ON is detected.
3.
The machine decelerates to the "[Pr.47] Creep speed", and subsequently moves at that speed. (At
this time "[Pr.54] OPR torque limit value" is required. If the torque is not limited, the servomotor
could be damaged in step 4.)
4.
The machine contacts against the stopper at "[Pr.47] Creep speed", and then stops.
5.
After stopping, the pulse output from the LD75 stops with the zero signal (signal that is output on
detection of contact with the stopper. Input externally), and the machine OPR is completed.
OPR speed
2.
Pr.47 Creep speed
3. 4. 5.
t
Range to forcibly stop the servomotor
rotation with the stopper.
ON
OFF
Dwell time up
Dwell time
counting
Pr.46
OPR speed
V
Pr.47
2.
3. 4
5.
1.
Zero signal
ON
Near-point dog OFF
CHAPTER 5 DATA USED FOR POSITIONING CONTROL
Creep speed
Stop with stopper
t
5
141