Emerson P/N 400518-02 User Manual

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Operational Overview

All Indexes use linear acceleration and deceleration ramps which may or may not reach the specified velocity depending on 
the total distance and the ramp values. For example, a short move with long acceleration and deceleration ramps may not 
reach the peak velocity entered.

Indexes cannot be initiated when any other motion (jogging, homing) is in progress. Indexes can be aborted with the Stop 
Input function.

The device supports five types of indexes: Absolute, Incremental, Registration, Rotary plus, and Rotary minus. 

The difference between absolute and incremental indexes is that absolute indexes move to a specific absolute position and 
incremental indexes move the motor a specific distance. The figures and explanations below demonstrate this concept.

Absolute indexes are used in applications where the motor must travel to a specific position, regardless of where the motor 
is when the index is initiated.

The device calculates the distance required to move to the specified position from the current position.

Start position = 6

Absolute index position = 4