7.1.9 Current position presetting during positioning operation
The ‘current position preset’ function is operative even when positioning is in progress. The resulting
operation is explained below.
(1) When the positioning direction is not changed as a result of the preset function:
The positioning operation is not interrupted.
However, because positioning control will now be based the current position value which exists
after the current position preset function is executed, the speed may be switched from high-speed
to medium-speed or low-speed after the current position preset function occurs, depending on the
new position’s distance from the target position.
(2) When the positioning direction is reverse as a result of the current position preset function:
Positioning will be stopped (emergency stop), and after a ‘stop detection’ has occurred, positioning
toward the target position will be re-started based on the current position value which exists after
the current position preset function is executed.
After being re-started, positioning occurs in the normal manner.
(3) When the current position value enters the stop zone as a result of the current position preset function:
Positioning will be stopped (emergency stop), and after a ‘stop detection’ has occurred, a ‘START
from stop zone’ operation will automatically be executed, with positioning being based on the
current position value which exists after the current position preset function is executed.
However if the ‘START from stop zone disabled’ parameter setting has been designated,
positioning will not be re-started once the stop zone has been entered.
(4) The VS-212DN automatically recognizes a ‘stop status; (stop detection) when the change in the
current position value per each 100 ms is plus/minus 2 bits (expresses as sensor binary value).
(5) The current position preset function can be disabled during positioning operations by designating a
‘1’ setting (sequence program setting) for the input signal bit corresponding to the buffer memory’s
current position preset ‘input disabled’ setting (I/O address: 16391 [16455]) address.
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