ADLINK Technology PCI-8174, Руководство пользователя

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62 Operation Theory
4.2.15 Position Override Function
Position override means that when users issue a positioning com-
mand and want to change its target position during this operation.
If the new target position is behind current position when override
command is issued, the motor will slow down then reverse to new
target position. If the new target position is far away from current
position on the same direction, the motion will remain its speed
and run to new target position. If the override timing is on the
deceleration of current motion and the target position is far away
from current position on the same direction, it will accelerate to
original speed and run to new target position. The operation exam-
ples are shown as below. Notice that if the new target position’s
relative pulses are smaller than original slow down pulses, this
function can’t work properly.