Mitsubishi Electric MELSECQ Series User Manual page 151

8 OPR CONTROL
Fig. 8.3 Operation when the near-point dog is turned OFF before the creep speed is reached
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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) When the near-point dog is ON, starting the axis will cause the "Start during
near-point dog ON" error (error code: 201). Perform JOG operation to move the
axis to the position where the near-point dog turns OFF.
(2) The near-point dog must be ON during deceleration from " OPR. 4 OPR speed"
"OPR. 5 Creep speed".
The following is the operation performed if the near-point dog turns OFF before
deceleration to the creep speed.
Machine OPR control start
OFF
(Positioning start signal: Y8 to YF)
OPR request flag
OFF
Md.7 Status: b0
OPR complete flag
OFF
Md.7 Status: b1
Deviation counter clear output
Md.4 Axis operation status
Standby
Md.2 Movement amount after
Unfixed
near-point dog ON
Md.1 Current feed value
Unfixed
(3) 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
ON
Near-point dog
OFF
Zero signal
ON
ON
During OPR
0
Traveled value is stored
MELSEC-Q
Deceleration started when near-point dog turns ON
Near-point dog turns OFF during deceleration
OPR.5 Creep speed
t
Md.2 Movement amount after near-point dog ON
One motor revolution
ON
Pr.8 Deviation counter clear signal output time
Standby
Value marked 1
OP address
1
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