Delta RMC151 - Manual (Page 32)

RMC70/150 and RMCTools User Manual
If you wish to use units not listed, choose Custom, then type up to 4 characters in
the Custom Units parameter.
c. For dual-loop axes, repeat this in the Secondary Control Setup section.
d. Click the Download button to apply the changes.
8. Tune Each Axis
In order to control an axis in closed-loop control, it must first be tuned. Refer to the
online help for the tuning procedure:
a. In RMCTools, on the Tools menu, click Tuning Tools. This pane provides everything
you need for tuning the axes.
b. Follow the instruction in the Tuning topic to tune the system.
9. Set up and Configure the Communications
If your RMC will be communicating with an external controller, such as a PLC, PC, or other
device, you must set up the communication. Refer to one or more of the following topics
for details on configuring the communication type of your RMC controller:
• Ethernet Overview
• PROFIBUS-DP
• Serial Overview
10. Save Your Configuration Settings
Make sure to save your settings! This can be done in the following ways:
• Save your RMCTools project. Before doing this, make sure the project data is the same
as the controller data. To save the project, on the File menu, click Save.
• On the Controller menu, click Update Flash.
2.2. Scaling
2.2.1. Scaling Overview
Scaling refers to converting the transducer feedback into meaningful units. The RMC uses the
Scale and Offset parameters to convert the transducer Counts into measurement units
(position, velocity, pressure, force). For example, the Voltage returned by an analog position
transducer must be converted to positions in order to be useful for control. In order to
correctly convert the transducer feedback to useful units, you must calculate the Scale and
Offset parameters.
Position Units
The RMC uses the default terms Position Units (pu), Pressure Units (Pr), and Force
Units (Fr) for the scaled feedback. You can change these to feedback units of your
preference by choosing from a list or entering a custom unit. See Display Units for details.
Calculating the Scale and Offset
RMCTools provides Scale/Offset wizards to help you calculate the Scale and Offset
parameters. You can also calculate the parameters manually.
Scale/Offset Wizards
12 Delta Computer Systems, Inc.