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MELSEC-Q
8 OPR CONTROL
Operation timing and processing time of fast OPR
The following shows details about the operation timing and time during fast OPR.
t1
t3
t2
Position control
Standby
Standby
Positioning start signal
BUSY signal [XC,XD,XE,XF]
Start complete signal
Output pulse to external source
(PULSE)
Positioning operation
Md.26
Axis operation status
[Y10,Y11,Y12,Y13]
[X10,X11,X12,X13]
Fig. 8.17 Operation timing and processing time of fast OPR
Normal timing time
Model t1 t2 t3
QD75P N/QD75D N 0.2 to 1.1ms 0.4 to 1.3ms 0 to 0.9ms
QD75P /QD75D 1.0 to 1.3ms 2.7 to 4.4ms 0 to 1.8ms
•
The t1 timing time could be delayed by the operation state of other axes.
Operating restrictions
(1) The fast OPR can only be executed after the OP position is established by
executing the Machine OPR.
If not, the error "OPR request ON" (error code: 207) will occur.
(OPR request flag (
Md.31
Status: b3) must be turned OFF.)
(2) If the fraction pulse is cleared to zero using current value changing or fixed-
feed control, execute the fast OPR and an error will occur by a cleared
amount.
(3) When unlimited length feed is executed by speed control and the current
machine feed value overflows or underflows once, the fast OPR cannot be
executed normally.
(4) The OPR complete flag (
Md.31
Status: b4) is not turned ON.
(5) The axis operation status during fast OPR is "Position control".
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