Emerson EZMotion, User Manual, Page: 143 / 268

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EZMotion User/Programming Guide
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Revision A8 www.controltechniques.com
time the input must be active to be considered a valid input.
The rising edge of the sensor is still used for the reference position. This maintains accuracy while providing the ability to
ignore false inputs.
8.7.3 Index View
Figure 140: Index View
Following is a list of parameters used to configure each index.
Index Number
The Index Number parameter selects the index number with a scroll box.
Index Name
The User can specify an Index name of up to 12 alphanumeric characters. This allows assigning a descriptive name to each
index indicating different machine operations.
IndexType
Select the index type from Incremental, Absolute, Correction, Posn Tracker Cont., Posn Tracker Once, Registration, Rotary
Plus, or Rotary Minus.
Click the down arrow on the parameter list box to select the desired type of Index Profiles, as follows:
Incremental Indexes run a specified distance from the current position.
Absolute Indexes move to an exact position with respect to the home reference point. The absolute index could run in either a
clockwise (CW) or counterclockwise (CCW) direction dependent on the current position when it is initiated.
Correction Indexes are used to follow a dynamic fieldbus or analog value that changes the index distance of the index prior to
and during the index motion. Correction indexes use incremental distance values. The index distance value can be updated
via Fieldbus, by simply writing to the index distance parameter. If the analog input's Destination Variable is set to an Index
Distance parameter, the index's distance value will be updated by the Analog to Position scaling found in the Analog Input
view. See Analog Input view.
Posn Tracker indexes are used to follow a dynamic fieldbus or analog value that changes the end point of the index prior to
and during the index motion. Position Tracker indexes use absolute position values. The position value can be updated via
fieldbus, by simply writing to the index position parameter. If the analog input's Destination is set to an Index number, the
index's position value will be updated by the Analog to Position scaling found in the Analog Input view.
A Registration Index runs at the specified velocity until a registration sensor is seen or until it reaches the Registration Limit
Distance. If a Registration Sensor is seen, then the index runs an additional Registration Offset distance.
Rotary Plus and Rotary Minus type indexes are typically used in applications which use rotary rollover. These absolute