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MELSEC-Q
8 OPR CONTROL
Precautions during operation
(1) An error "Count method movement amount fault (error code: 206)" will occur
and the operation will not start if the "
Pr.50
Setting for the movement
amount after near-point dog ON" is smaller than the deceleration distance
from the "
Pr.46
OPR speed" to "
Pr.47
Creep speed".
A deceleration stop will be carried out if the speed is changed during the
operation and an error occurs.
(2) The following shows the operation when a machine OPR is started while the
near-point dog is ON.
(3) 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.
ON
1)
5)
4)
3)
2)
Zero signal
Near-point dog OFF
Pr. 50 Setting for the movement
amount after near-point dog ON
[Operation when an OPR is started at the
near-point dog ON position]
1) An OPR is started.
2) The machine moves at the OPR speed in the
opposite direction of an OPR.
3) Deceleration processing is carried out by
"
Pr.39
Stop group 3 sudden stop
selection" when the near-point dog OFF is
detected.
4) After the machine stops, an OPR is carried
out in the OPR direction.
5) The OPR is completed after the deviation
counter clear output is provided on detection
of the first zero signal after the travel of the
movement amount set to "
Pr.50
Setting for
the movement amount after near-point dog
ON" on detection of the near-point dog signal
ON.
Fig. 8.13 Count method 1) machine OPR on the near-point dog ON position
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