Mitsubishi Electric MELSEC-Q QD75M User Manual page 354

8 OPR CONTROL
Machine OPR start
(Positioning start signal)
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
Precautions during operation
(1) An error "Start at home position (OP) fault (error code: 201)" will occur if another
machine OPR is attempted after a machine OPR completion when the OPR retry
function is not set ("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".
(4) When the stop signal stops the machine OPR, carry out the machine OPR again.
When restart command is turned ON after the stop signal stops the OPR, the error
"OPR restart impossible (error code: 209)" will occur.
(5) After the servo amplifier turned on, the zero point of the encoder must be passed at
least once before point A is reached.
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)".
OFF
OFF
OFF
Standing by
Inconsistent
Inconsistent
Pr.48 OPR retry").
V
Pr. 46 OPR speed
ON
Near-point dog OFF
ON
ON
In OPR
0
Value the machine moved is stored
8 - 7
MELSEC-Q
Pr. 47 Creep speed
t
In error
Address at stop
Pr.47