Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 252)

5.8 DDC Instructions
5.8.11 Linear Accelerator/Decelerator 1 (LAU)
5-183
Instructions
5
[ c ] Precaution When Input Speed Changes Across a Speed of 0
If a reference is input that causes the speed to cross a speed of 0, the output changes as shown by d in the following
figure.
c If operation stops at a speed of 0, operation will proceed according to the set deceleration and acceleration times.
d If the speed reference crosses the point where speed equals 0, operation is controlled by the deceleration time so
that the speed does not fluctuate.
‹ Positive Speed → 0 → Negative Speed
Deceleration Deceleration Acceleration Deceleration Acceleration Deceleration
0
‹ Negative Speed → 0 → Positive Speed
V
c c d d