Mitsubishi GX Configurator-PT, User Manual

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8 - 6 8 - 6
MELSEC-Q
8 OPR CONTROL
8.2.4 OPR method (2): Stopper 1
The following shows an operation outline of the "stopper 1" OPR method.
Operation chart
1)
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".)
2) Near-point dog ON is detected and deceleration starts at the time set in " OPR. 6 ACC/DEC time at OPR".
3)
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.)
4) The machine presses against the stopper at the creep speed and stops.
5)
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 .)
6)
After a "deviation counter clear output" is output to the drive unit, the OPR complete flag (Md. 7Status: b1) turns from
OFF to ON, and the OPR request flag (Md. 7Status: b0) turns from ON to OFF.
Range in which the motor rotation
is forcibly stopped by the stopper
t
ON
OFF
Torque limit
Time out of OPR dwell time
ON
OFF
OFF
ON
V
Near-point dog
ON
OFF
1) 2) 3) 4) 5) 6)
Pr.6
Stopper
OPR dwell time
measurement
OPR control start
(Positioning start signal: Y8 to YF)
Axis operation status
Movement amount after
near-point dog ON
Current feed value
Deviation counter clear output
OPR request flag
OPR complete flag
Md.2
Md.1
Md.4
Md.7
Md.7 Status: b0
Status: b1
Standby During OPR Standby
Unfixed 0
Unfixed Traveled value is stored OP address
Deviation counter clear signal output time Pr.8
OPR speed OPR.4
Deceleration at the near-point dog ON
Creep speed
OPR.5
Bias speed at start
Fig. 8.4 Stopper 1 machine OPR control