Mitsubishi GX Configurator-PT, User Manual

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8 - 8 8 - 8
MELSEC-Q
8 OPR CONTROL
8.2.5 OPR method (3): Stopper 2
The following shows an operation outline of the "stopper 2" 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)
On detection of the zero signal after the stop, 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. 7 Status: b1) turns from
OFF to ON, and the OPR request flag (Md. 7 Status: b0) turns from ON to OFF.
t
OPR control start
(Positioning start signal: Y8 to YF)
ON
OFF
OPR speed
Creep speed
Torque limit
ON
OFF
OFF
ON
Standby During OPR Standby Axis operation status
Unfixed 0
Movement amount after
near-point dog ON
Traveled value is stored OP address Current feed value
V
Near-point dog
ON
OFF
Stopper
Zero signal
Deviation counter clear output
OPR request flag
OPR complete flag
Status: b0 Md.7
Md.4
Md.2
Md.1
OPR.4
OPR.5
1) 2) 3) 4) 5) 6)
Deviation counter clear signal output time
Pr.8
Bias speed at start Pr.6
Deceleration at the near -point dog ON
Status: b1
Md.7
Unfixed
Fig. 8.6 Stopper 2 machine OPR control