Mitsubishi QD75M1, User Manual

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8 - 7
MELSEC-Q
8 OPR CONTROL
Precautions during operation
(1) An error "Start at OP (error code: 201)" will occur if another OPR is attempted after
an OPR completion when the OPR retry function is not set ("0" is set in " Pr.48
OPR retry"). (The OPR will not be carried out.)
(2) OPR carried out from the near point dog position will start at the "
Pr.47
Creep
speed".
(3) The near-point dog must be ON during deceleration from the OPR speed "
Pr.47
Creep speed".
(4) When the stop signal stops the OPR, carry out the OPR again. When restart request
is turned ON after the stop signal stops the OPR, the error "OPR restart impossible
(error code: 209)" will occur.
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)".
t
V
ON
OFF
ON
OFF
OFF
0
ON
Near-point dog OFF
In error
Pr. 46 OPR speed
Pr. 47 Creep speed
In OPR Standing by
Inconsistent
Inconsistent Value the machine moved is stored
Address at stop
OPR start
OPR request flag
[ Md.31 Status : b3]
OPR complete flag
[ Md.31 Status : b4]
Md.26 Axis operation status
Md.34 Movement amount
after near-point dog ON
Md.20 Current feed value
Md.21 Machine feed value
Fig. 8.3 Operation when the near-point dog is turned OFF before the creep speed is reached