Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 728)

Tuning a Digital or Tachless Analog System
Appendix A
A-6
This tuning procedure assumes you are using a strip chart recorder (an
oscilloscope or other device may be used however we recommend it has
either printing or storage capability for comparison of curves). Since this
is a tachless servo system you must connect the strip chart recorder to the
spindle connector and use the DAC monitor feature.
The DAC monitor feature is used to direct velocity or following error
information for a selected servo to the spindle port. The servo you are
tuning must be on the same servo card as the spindle connector used for the
strip chart recorder. 9/230 controls only have one spindle port that can be
used with all servos on that system.
ATTENTION: If a spindle (or other device) is configured and
attached to the analog out spindle port, make sure that the drive
is disabled and will be in a safe state throughout the tuning
procedure. We recommend disconnecting the wiring to this
device from the analog out spindle port when using the DAC
monitor.
Attach the strip chart recorder to the Analog Out spindle port. Refer to
your 9/Series Integration and Maintenance manual and your strip chart
recorder documentation for polarity considerations.
Turning the DAC Monitor On
The DAC monitor utility can only be enabled through a feature called
patch AMP. Patch AMP allows you to alter some AMP values from the
control without having to use the ODS AMP editor and download utilities.
The parameters to turn the DAC monitor utility on are not available to the
AMP editor in ODS.
For details on using the patch AMP feature refer to page 41-1. These patch
AMP parameters are used to configure the DAC monitor feature:
DAC Monitor Parameters Function
# 86 #86 enables the DAC monitor on the first servo
board of 9/260 and 9/290 systems. It enables the
DAC monitor on the analog out on 9/230 systems,
and the first analog out on 9/440 controls.
# 910 Scales the DAC output for #86.
# 87 #87 enables the DAC monitor on the second servo
board of 9/260 and 9/290 systems. It enables the
DAC monitor for the second analog out on 9/440
controls.
# 930 Scales the DAC output for #87.
A.3
Connect the Strip Chart
Recorder