Mitsubishi Melsec-Q QD75D1, User Manual, Page: 302 / 858

8 - 10
MELSEC-Q
8 OPR CONTROL
Restrictions
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".)
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).
t
OPR speed
Creep speed
V
ON
OFF
ON
OFF
OPR request flag
OFF
OPR complete flag
Standby OPR
Inconsistent
0 Movement amount
after near-point dog ON
Inconsistent
Value the machine moved is stored
Current feed value
Error
Address at stop
"
Pr.46
Pr.47
Md.34
Md.20
Md.21
Status : b3
Status : b4
Md.31
Md.31
Md.26
Stopper
Machine feed value
Pr.49 OPR dwell time" setting
Machine OPR start
(Positioning start signal)
[Y10,Y11,Y12,Y13]
Axis operation status
Fig. 8.5 Operation when the dwell time elapses during deceleration from the OPR speed