MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D - Manual (Page 287)

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MELSEC-Q
8 OPR CONTROL
Restrictions
(1) Always limit the servomotor torque after the " Pr.47 Creep speed" is reached. If the
torque is not limited, the servomotor may fail when the machine presses against the
stopper. (Refer to Section 12.4.2 "Torque limit function".)
(2) In the "stopper method 1)", the OPR retry function is unusable.
Precautions during operation
(1) Set a value in the " Pr.49 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 workpiece will continue decelerating and stop if the " Pr.49 OPR dwell time"
elapses during deceleration from the " Pr.46 OPR speed", thus causing an error
"Dwell time fault (error code: 205)".
Md.34 Movement amount
after near-point dog ON
Md.26 Axis operation status
t
V
ON
OFF
ON
OFF
OFF
0
In error
Address at stop
" Pr.49 OPR
dwell time" setting
Pr. 46 OPR speed
Pr. 47 Creep speed
Machine OPR start
(Positioning start signal)
OPR request flag
[ Md.31 Status : b3]
OPR complete flag
[ Md.31 Status : b4]
Md.20 Current feed value
Md.21 Machine feed value
Standing by
Inconsistent
Inconsistent
In OPR
Value the machine moved is stored
Stops at stopper
Fig. 8.5 Operation when the dwell time elapses during deceleration from the OPR speed