Mitsubishi QD75P1N User Manual page 300

8 OPR CONTROL
Machine OPR start
(Positioning start signal)
[Y10,Y11,Y12,Y13]
OPR request flag
Md.31
OPR complete flag
Md.31
Md.26
Md.34
Md.20
Md.21
Fig. 8.3 Operation when the near-point dog is turned OFF before the creep speed is reached
Restrictions
A pulse generator with a zero signal is required.
When using a pulse generator without a zero signal, generate a zero signal using an
external signal.
Precautions during operation
(1) An error "Start at OP (error code: 201)" will occur if another machine OPR is
attempted after a machine OPR completion when the OPR retry function is not set
Pr.48
("0" is set in "
(2) Machine OPR carried out from the near-point dog ON position will start at the
Pr.47
" Creep speed".
(3) The near-point dog must be ON during deceleration from the OPR speed "
Creep speed".
The workpiece will continue decelerating and stop if the near-point dog is turned OFF
before it has decelerated to the creep speed, thus causing an error "Dog detection
timing fault" (error code: 203).
V
ON
OFF
ON
OFF
Status : b3
OFF
Status : b4
Axis operation status
Standby
Inconsistent
Movement amount
after near-point dog ON
Current feed value
Inconsistent
Machine feed value
(4) When a machine OPR is stopped with the stop signal, perform a machine OPR again.
If the restart command is turned ON after a stop with the stop signal, an error "OPR
restart not possible" (error code: 209) occurs.
OPR retry").
Pr.46
OPR speed
ON
Near-point dog OFF
OPR
0
Value the machine moved is stored
8 - 8
MELSEC-Q
Pr.47 Creep speed
t
Error
Address at stop
Pr.47