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8 OPR CONTROL
Machine OPR control start
(Positioning start signal: Y8 to YF)
OPR request flag
Md.7 Status: b0
OPR complete flag
Md.7
Status: b1
Deviation counter clear output
Axis operation status
Md.4
Md.2
Movement amount after
near-point dog ON
Md.1
Current feed value
Fig. 8.5 Operation when the dwell time elapses during deceleration from the OPR speed
8 - 9
Restrictions
(1) Always limit the motor torque after the " OPR. 5 Creep speed" is reached. If the
torque is not limited, the motor may fail when the machine presses against the
stopper. (Refer to section "12.4.2 Torque limit function".)
(For a torque limit, refer to the manual of the drive unit used.)
Precautions during operation
(1) Set a value in the "OPR. 9 OPR dwell time" that is equal to or higher than the
movement time from the near-point dog ON to the time the machine presses
against the stopper.
(2) The following is the operation performed if "OPR. 9 OPR dwell time" elapses
during deceleration from "OPR. 4 OPR speed".
V
OPR.4
Pr.6
Bias speed at start
Torque limit
Near-point dog
ON
OFF
ON
OFF
OFF
Standby
During OPR
Unfixed
0
Unfixed
Traveled value is stored
(3) If the axis is started during near-point dog ON, it starts at "OPR. 5 Creep
speed".
(4) If the axis stop signal is turned ON during operation performed at "OPR. 4
OPR speed", the axis decelerates to a stop at the time set in "OPR. 7 DEC/
STOP time at OPR".
OPR speed
ON
OFF
MELSEC-Q
Deceleration started when near-point dog turns ON
Dwell time-out during deceleration
OPR.5
Creep speed
Stopper
t
OPR dwell time-out
OPR dwell time counting
ON
Pr.8
Deviation counter clear signal output time
Standby
OP address
8 - 9
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