Rockwell Automation 2090 Ultra3000 Servo Drives Integration Manual - Manual (Page 158)

Publication 2098-IN005C-EN-P — March 2008
158 Minimizing the Effects of Feedback Signal Loss
7. Click the Conversion tab.
8. Observe the Conversion Constant value.
The Conversion tab shows how the user-defined position units
relate to drive resolution counts, and, therefore, to raw and
interpolated feedback counts and axis revolutions.
Summary
In this example, the Position Error Tolerance limit setting of
0.77312005 position units at 200,000 drive resolution counts per 1
position unit results in approximately 154,624 drive resolution counts
(0.77312005 x 200,000) of allowable position error. Because in this
case, 1 position unit is also equal to one axis revolution, the Position
Error Tolerance limit setting is equal to approximately 77.3%
(0.77312005) of 1 axis revolution.
The optimal Position Error Tolerance limit setting is chosen based on
your knowledge of the system requirements and the maximum system
position error excursion limit values. The default limit setting shown
above may not be optimal for every application. You must understand
the application needs and adjust this default limit setting as
appropriate.
TIP
The Dynamics tab provides additional limit parameters, such as
maximum speed, acceleration, and deceleration of the drive
and motor system. These limits are specified in the same
position units.