Rollover

The Rollover Position is specified in user units in the PLCopen A vendor -and product- independent worldwide association active in Industrial Control and aiming at standardizing PLC file formats based on XML Axis Data dialog. When this value is non-zero, the axis' position is reset to zero when it reaches the rollover position.

For example, if the rollover position is 360 and the axis is traveling in the positive direction, the axis position counts up until it reaches 360 where it resets to 0 and then continues counting up from there.
If the axis is traveling in the negative direction, the axis position counts down until it reaches 0, where it resets to 360 and then continues counting down from there.

Refer to MC_MoveAbsolute's description for an explanation of its operation when Rollover Position is nonzero.

When the Rollover Position is zero, rollover is not in effect and the axis position continues to count up when traveling in the positive direction and count down when traveling in the negative direction.

See Also