MC-Basic:axis.POSITIONEXTROLLOVERMIN

When an axis has the POSITIONEXTROLLOVERENABLE flag set (ON), it means that this PEXT of the axis is rotary (i.e., the position coordinates of the axis are periodical). POSITIONEXTROLLOVER defines the period (the length one revolution in user units) of the axis. POSITIONEXTROLLOVERMIN defines the lower limit coordinate of the revolution. So if we have:
       POSITIONEXTROLLOVERENABLE = 1
       POSITIONEXTROLLOVERMIN = -180
       POSITIONEXTROLLOVER = 360

The PEXT of the axis will run between –180 and +180 degrees. If we move by one degree in positive direction from 180 the PEXT value will be –179.

Syntax

<axis name>.PositionExtRolloverMin = <value>
?<axis name>.PositionExtRolloverMin

Type

Double

Range

MinDouble-MaxDouble

Default

-180

Scope

R/W, Configuration, Task, Terminal

Limitations

The POSITIONEXTROLLOVERMIN value may be changed only when the axis is disabled. In order to set the value within a task, the motion element must be attached to that task (using the ATTACH command).

Examples

A1.PositionExtRolloverMin = -180

A1. PositionExtRollover = 360
       then we have coordinates between –180 and 180 degrees

See Also

• ATTACH
• axis.POSITIONROLLOVERENABLE