Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 41)

Publication 8720MC-IN002A-EN-P — December 2002
Commissioning Your 8720MC Analog Drive 2-9
Auto Tuning Your 8720MC
Drive This section provides the information you need to auto tune your
8720MC drive. This procedure assumes that you have wired your
8720MC drive and have completed the procedures already covered in
this chapter.
Before You Perform an Auto Tune
Observe the following guidelines before auto tuning your drive.
• The Drive Status LED must be flashing green to indicate the bus
voltage is up. Refer to Start-up Troubleshooting Procedures in
Chapter 3 for the status LED troubleshooting table.
• Make sure the desired application load for this group of servo
loop parameters is connected to the motor.
• Auto tune default parameter values are normally adequate. To
change them, refer to Appendix C.
Performing the Auto Tune
To auto tune your drive:
1. Before initiating the auto tuning of the motor make sure the
desired application load for this group of servo loop parameters is
connected to the motor.
2. For the analog input command configuration, set Parameter 501,
the application parameter, to either “Ana Spindle” or “Ana Servo”
as required by the application.
3. Set Parameter 503, “Aux Fdbk Type”, to “Analog Ref” to ensure the
drive is prepared to accept an analog command reference via the
auxiliary feedback port. This is a general requirement for any
analog input application and not specifically for auto tuning.
ATTENTION
!
Auto tuning will initiate a fast rotation in one
direction of the motor shaft followed by a fast
rotation in the opposite direction; resulting in
rapid motion of the connected load. Make sure
all mechanical connections are securely
fastened and that nothing is in the path of the
load. Failure to observe this precaution could
result in bodily injury.