Mitsubishi Electric MELSECQ Series User Manual page 155

8 OPR CONTROL
Machine OPR control start
(Positioning start signal: Y8 to YF)
OPR request flag
OPR complete flag
Deviation counter clear output
Md.4
Md.2
Md.1
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Restrictions
(1) Always limit the motor torque after the " OPR. 5 Creep speed" is reached. If the
torque is not limited, the motor may fail when the machine presses against the
stopper.
(For a torque limit, refer to the manual of the drive unit used.)
(2) Use an external input signal as the zero signal.
Precautions during operation
(1) Input a zero signal from an external source after the machine presses against
the stopper.
The following is the operation performed if the zero signal is input before
deceleration to "OPR. 5 Creep speed".
OFF
OFF
Md.7 Status: b0
OFF
Md.7
Status: b1
Axis operation status Standby
Movement amount after Unfixed
near-point dog ON
Unfixed
Current feed value
Fig. 8.7 Operation performed if zero signal is input before deceleration to creep speed
(2) The near-point dog must be turned ON until it presses against the stopper.
(3) If the axis is started during near-point dog ON, it starts at "OPR. 5 Creep
speed".
(4) If the axis is started during zero signal ON, the "Zero signal ON" error (error
code: 202) occurs.
(5) If the axis stop signal is turned ON during operation performed at "OPR. 4
OPR speed", the axis decelerates to a stop at the time set in "OPR. 7 DEC/
STOP time at OPR".
search engine
V
OPR.4 OPR speed
Pr.6 Bias speed at start
Zero signal
Torque limit
ON
Near-point dog
OFF
ON
ON
During OPR
0
Traveled value is stored
MELSEC-Q
Deceleration started when near-point dog turns ON
Zero signal input during deceleration
OPR.5 Creep speed
Stopper
t
ON
Pr.8
Deviation counter clear signal output time
Standby
OP address
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