8 - 10 8 - 10
MELSEC-Q
8 OPR CONTROL
8.2.6 OPR method (4): Stopper 3
The following shows an operation outline of the "stopper 3" OPR method.
The "stopper 3" method is effective when a near-point dog has not been installed.
(Note that the operation is carried out from the start at the " OPR. 5 Creep speed", so it
will take some time until the OPR control completion.)
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. 5 Creep speed". At this time, the motor torque must be limited. If the torque is not limited,
the motor may fail at 2.)
2)
The machine presses against the stopper at the creep speed and stops.
3)
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 .)
4)
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.
OPR control start
(Positioning start signal: Y8 to YF)
t
ON
OFF
ON
OFF
OFF
ON
V
Creep speed
Torque limit
Zero signal
Stopper
Standby
Standby
0
OP address
OPR.5
Pr.8
Deviation counter clear output
Axis operation status
Movement amount after
near-point dog ON
Current feed value
OPR request flag
Status: b0
Md.7
Md.4
Md.2
Md.1
Bias speed at start
Pr.6
1)
2) 3) 4)
OPR complete flag
Status: b1
Md.7
Unfixed
Standby
During OPR
Traveled value is stored
Deviation counter clear signal output time
Fig. 8.8 Stopper 3 machine OPR control
Summary of Contents for GX Configurator-PT
Page 13: ...MEMO SECTION 1...
Page 127: ...7 20 7 20 MELSEC Q 7 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL MEMO...
Page 129: ...MEMO SECTION 2...
Page 221: ...Index 5 Index 5 MEMO...
