9 - 9
MELSEC-A
9 MAIN POSITIONING CONTROL
POINT
(3) When the interpolation axis reveres direction suddenly, the command pulses from AD75 are output as shown in the
figure below.
Reverse run command
t1
t2
Forward run command
The t1 and t2 are calculated using the following expressions, where a command frequency is f (pps).
t1 = 1/2 f (s) t2 = 1/f (s)
A time of t1 must be maintained by the drive unit for a specified period T (s).
(T depends on the drive unit specifications.)
If t1 cannot be maintained for T or longer, lower the " Da.7 Command speed" of the positioning data.
(4) In the continuous path control positioning data, assure a movement distance so that the execution time with that
data is 100 ms or longer, or lower the command speed.
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Содержание A1SD75P1-S3
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