Mitsubishi Electric MELSEC-L02SCPU User Manual page 67

(1) OPR method
Set the method of machine OPR. (This setting does not affect the fast OPR.) Operations under each method are
explained below. For details of each method and applicable precautions, refer to ( Page 71, Section 7.6.1).
V
OPR speed
2)
Bias speed at start
3)
1)
ON
Near-point
OFF
watchdog signal
Zero signal
V
OPR speed
2)
Creep speed
Bias speed at start
3) 4)
1)
ON
Near-point
watchdog signal OFF
Dwell time counting
V
OPR speed
2)
Bias speed at start
3)
4)
1)
Zero signal
ON
Near-point
OFF
watchdog signal
Near-point dog method
1) Start of machine OPR.

2) The axis starts to decelerate upon detection of turning on of the
near-point dog.

Creep speed
3) The axis decelerates to the creep speed and moves at the creep
4)
speed thereafter.
t

4) Pulse output from the LCPU stops when the first zero signal is
First zero after
the near-point issued after the near-point dog has turned off, and machine OPR is
watchdog signal
OFF complete.
Stopper 1
1) Start of machine OPR.

2) The axis starts to decelerate upon detection of turning on of the
near-point dog.

3) The axis decelerates to the creep speed and moves at the creep
5)
t speed thereafter.
Range where motor

rotation is forcibly
stopped by stopper
4) The axis contacts the stopper at the creep speed and stops.

Dwell time out
5) Upon elapse of the OPR dwell time after the near-point dog has
turned on, pulse output from the LCPU stops and machine OPR is
complete.
Stopper 2
1) Start of machine OPR.

2) The axis starts to decelerate upon detection of turning on of the
Creep speed
near-point dog.
Stopped by

stopper
3) The axis decelerates to the creep speed and moves at the creep
speed thereafter.
t
5)

4) The axis contacts the stopper at the creep speed and stops.

5) When the zero signal is detected, pulse output from the LCPU
stops and machine OPR is complete.
CHAPTER 7 POSITIONING FUNCTION
7
65