Mitsubishi GX Configurator-PT, Руководство пользователя

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MELSEC-Q
8 OPR CONTROL
8.2.3 OPR method (1): Near-point dog method
The following shows an operation outline of the "near-point dog method" 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)
The machine decelerates to the " OPR. 5 Creep speed", and subsequently moves at that speed.
(At this time, the near-point dog must be ON.)
4)
On detection of the first zero signal after near-point dog OFF, 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 .)
5)
After a "deviation counter clear signal" 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. 7status: b0) turns from ON to OFF.
t
OPR control start
(Positioning start signal: Y8 to YF)
ON
OFF
OPR speed Deceleration at the near-point dog ON
Creep speed
ON
OFF
OFF
ON
Standby During OPR Standby Axis operation status
Unfixed 0 Movement amount after
near-point dog ON
Unfixed
Traveled value is stored
OP address Current feed value
V
Zero signal
Value marked
Deviation counter clear output
Movement amount after near-point dog ON
Near-point dog
ON
OFF
One motor rotation
OPR request flag
OPR complete flag
Md.2
Adjust so the near-point dog OFF position is
as close as possible to the center of the zero
signal HIGH level.
If the near-point dog OFF position overlaps
with the zero signal, the OPR control stop
position may deviate by one motor rotation.
1) 2) 3) 4) 5)
OPR.4
OPR.5
Md.2
Md.1
Md.4
Md.7
Md.7
Deviation counter clear signal output time
Pr.8
Bias speed at start Pr.6
Status: b0
Status: b1
1
1
Fig. 8.2 Near-point dog method machine OPR control