Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 110)

Formatting and Interpreting Data Blocks
Chapter 7
7Ć28
When the direction of axis motion is reversed, the in-position bit in the
status block must be on before axis motion in the reverse direction can
occur.
Note that the value you enter for the in-position band is actually half the
desired in-position band value. For example, if the in-position band value
you enter is 5, then the servo positioning assembly considers the axis
in-position if it is within +10 increments of feedback resolution of the
programmed endpoint. Figure 7.18 illustrates the concept of in-position
band.
Figure 7.18
InĆposition Band Example
+ Position
10 increments 10 increments
11040
Programmed Endpoint
In-Position
Band value stored in the
parameter block is 5.
Axis is considered InĆPosition
when it is within +10 increments
of the programmed endpoint
Rapid Traverse Rate
The rapid traverse rate you enter (Figure 7.19) is the highest feedrate the
axis can attain. It is associated with open travel of the axis. The servo
positioning assembly uses this rate for the go home operation and for
moves that you program to use the global feedrate.