Opr Method (2): Stopper 1 - Mitsubishi Electric MELSECQ Series User Manual

8 OPR CONTROL

8.2.4 OPR method (2): Stopper 1

1)
2)
3)
4)
5)
6)
Machine OPR control start
(Positioning start signal: Y8 to YF)
OPR request flag
Md.7 Status: b0
OPR complete flag
Md.7
Deviation counter clear output
Md.4
Md.2
Md.1
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The following shows an operation outline of the "stopper 1" OPR method.
Operation chart
Machine OPR control is started.
(Acceleration starts in the direction set in " OPR. 2 OPR direction" at the time set in " OPR. 6 ACC/DEC time at OPR",
and the axis moves at " OPR. 4 OPR speed".)
Near-point dog ON is detected and deceleration starts at the time set in " OPR. 6 ACC/DEC time at OPR".
Speed is reduced to " OPR. 5 Creep speed" and the axis then moves at the creep speed.
(At this time, the motor torque must be limited. If the torque is not limited, the motor may fail at 4.)
The machine presses against the stopper at the creep speed and stops.
When " OPR. 9 OPR dwell time" elapses after near-point dog ON, the pulse output from the QD70 stops immediately
and the "deviation counter clear output" is output to the drive unit.
(The "deviation counter clear signal output time" is set in Pr. 8 .)
After a "deviation counter clear output" is output to the drive unit, the OPR complete flag ( Md. 7 Status: b1) turns from
OFF to ON, and the OPR request flag ( Md. 7 Status: b0) turns from ON to OFF.
V
1)
ON
OFF
ON
OFF
OFF
Status: b1
Axis operation status
Standby During OPR
Movement amount after
0
Unfixed
near-point dog ON
Current feed value
Unfixed Traveled value is stored
Fig. 8.4 Stopper 1 machine OPR control
search engine
OPR.4 OPR speed
Deceleration at the near-point dog ON
OPR.5
Bias speed at start
Pr.6
2) 3) 4)
Torque limit
ON
Near-point dog
OFF
OPR dwell time
measurement
MELSEC-Q
Creep speed
Stopper
t
5) 6)
Range in which the motor rotation
is forcibly stopped by the stopper
Time out of OPR dwell time
ON
Pr.8 Deviation counter clear signal output time
Standby
OP address
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