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Chapter 9 Major Positioning Control
Operation timing and processing time during speed-position switching
control (ABS mode)
[QD77MS4 operation example]
Positioning start
signal [Y10,Y11,Y12,Y13]
BUSY signal
M code ON signal
[X4,X5,X6,X7](WITH mode)
Standby
Speed control
Start complete signal
Positioning operation
Positioning complete signal
M code ON signal (AFTER mode)
t1
t2
t3
t5
t2
t7
Position control
Speed
control
Position
control
Speed-position switching
command
t6
Speed control carried out until speed-position switching
signal turns ON
Md.26 Axis operation status
OPR complete flag
( Md.31 Status: b4)
Cd.7 M code OFF request
Cd.7 M code OFF request
Standby
[XC,XD,XE,XF]
[X10,X11,X12,X13]
[X14,X15,X16,X17]
[X4,X5,X6,X7]
t4
(Note): Refer to Section 3.3 for input/output signal of QD77MS16.
Fig. 9.17 Operation timing and processing time during speed-position switching control (ABS mode)
Normal timing time Unit: [ms]
Operation cycle t1 t2 t3 t4 t5 t6 t7
QD77MS2
QD77MS4
0.88 0.2 to 0.3 0 to 0.9 0 to 0.9 1.8 to 2.7 0 to 0.9 0.2 Follows parameters
0.88 0.3 to 1.4 0 to 0.9 0 to 0.9 1.8 to 2.7 0 to 0.9 0.2 Follows parameters
QD77MS16
1.77 0.3 to 1.4 0 to 1.8 0 to 1.8 3.2 to 3.9 0 to 1.8 0.2 Follows parameters
•
The t1 timing time could be delayed by the operation state of other axes.
•
When using the near-point dog signal and " Cd.46 Speed-position switching command", the t6
timing time could be delayed or vary influenced by the PLC scan time or communication with
servo amplifier.
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