Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 372)

Spindle 3 Parameters
Chapter 14
14-8
Generally the PAL program is written to display a warning message
whenever the control sets the Spindle Speed Deviation Excessive flag to
“TRUE.” The PAL program may also include a timer that forces more
aggressive action if the flag remains true for an extended period.
If the “Spindle Speed Deviation Excessive” flag remains “TRUE” for too
long or appears too often, there are a number of changes that can
prevent this:
1. The value for this parameter can be increased.
2. The parameter Dev. Detection Filter Time can be increased or
decreased to more closely match the actual spindle speed
transition time.
3. The PAL program can enhance a decision on spindle speed deviation
by using the “spindle up to speed” signal (if available) from the
spindle drive.
4. The PAL program can be written to ignore the “Spindle Speed
Deviation Excessive” flag during certain spindle speed transitions.
Refer to your PAL reference manual for more information.
This parameter must be set for each spindle axis.
This feature is not available on the 9/230, 9/260 or 9/440 controls.