Emerson EZMotion - Rotary Plus Index; Rotary Minus Index

40 EZMotion User/Programming Guide
www.controltechniques.com Revision: A8
6.3.6 Rotary Plus Index
A Rotary Plus Index is used when Rotary Rollover is active. The Rotary Plus Index is similar to an Absolute Index, but it is forced to
go in the positive direction to get to its programmed position. The programmed position for a Rotary Plus Index must be within the
Rotary Rollover range (Posn < Rotary Rollover). Figure 51 compares a Rotary Plus Index to an Absolute Index (Rotary Rollover is
enabled).
Figure 51: Rotary Plus Index Profile
Rotary Rollover: 360
o
, Index Position: 270
o
0
o
90
o
270
o
180
o
0
o
90
o
270
o
180
o
0
o
90
o
270
o
180
o
Rotary Plus
(Forced Positive)
Absolute
(Shortest Path)
Starting Position
Position After Index