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Chapter 1
Ultra1500 Drive Integration
The Ultra1500 drive Follower Gear Ratio parameter specifies the Master Counts to Follower Counts
IMPORTANT
relationship. In your case, this means the number of PTO Counts to Encoder Counts. The MicroLogix 1400
controller application code is based on a 1:109 gear ratio and must be set accordingly, otherwise the
Ultra1500 drive may misinterpret the PTO counts output from the MicroLogix 1400 controller, resulting in
unexpected motion.
Not all PTO Count to Encoder Count relationships can be represented in Ultraware, due to the limitation of
TIP
the Gear Ratio parameter, and thus some very small error can be expected with each PTO based move. If
your application requires a higher degree of precision, consult
choose a more granular Gear Ratio and how to adapt the MicroLogix 1400 controller code and Ultraware
configuration to use it.
Configure the Drive Encoder Output Parameters
The Ultra1500 drive Encoder Output parameters must be configured appropriately because the MicroLogix
1400 controller uses the Ultra1500 drive Buffered Encoder Motor Outputs to determine the drive relative
position feedback and to derive the drive relative speed feedback.
To configure the Ultra1500 drive Encoder Output parameters, perform the following steps.
1. Double-click Encoders.
2. Change the Encoder
Output Forward
Direction to A Leads B
3. Change the Output Ratio to 45:4096.
4. Press Enter.
Be sure to press Enter after typing in the parameter values. Typing the information without pressing enter
will not actually alter the drive parameter, leaving it unchanged.
The Ultra1500 drive Follower Encoder Output parameters specify the Output Counts to Motor Counts
IMPORTANT
relationship. In your case, this means the number of Buffered Encoder Motor Output counts to Encoder
Counts. The MicroLogix 1400 controller application code is based on a 45:4096 output ratio and must be set
accordingly, otherwise the MicroLogix 1400 controller may misinterpret the drive relative position feedback
and drive relative speed feedback.
16
.
Chapter 3
for further information on how to
Publication CC-QS008B-EN-P - December 2009
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