Delta RMC101 - Manual (Page 607)

Resolver 6.5
Transducer Interface Modules 6-63
6.5.3 Resolver Configuration
The resolver interface must be configured properly to work with your resolver. To configure it, use
the Module Configuration dialog:
1. On the Tools menu, click Module Configuration.
2. In the Slots list, click the Resolver module you want to edit.
3. Click Slot Options.
The dialog displayed will offer three tabs. See the descriptions of each below. After you have
chosen your settings, click Update RMC.
4. The Update Module Configuration dialog box will be displayed to indicate the progress. If the
module could not be reset automatically, you may be prompted to reset the module yourself.
5. In the RMC Configuration dialog box, click Close.
Reference Output tab:
Use this tab to configure the Reference Output that will be generated for the resolvers. This
reference is applied by the Reference Out + and Reference Out – pins on the connector.
• Frequency:
Your resolver specification sheet should indicate the design frequency for your resolver. The
RMC resolver interface supports frequencies between 800 Hz and 5000 Hz.
If your resolver specifies a frequency outside the range available you can try using the closet
frequency available. In general it is OK to operate resolvers at frequencies higher than the
specified frequency. Operating at frequencies below the specified frequency can cause problems
due to saturation or incorrect impedance.
• Amplitude:
Your resolver specification sheet should indicate either a Transformation Ratio or the Input and
Output Voltages. Use the radio button to select the type of information you will use to configure
the interface and then enter the appropriate information in the appropriate edit boxes.
Notice that the RMC expects a 2 Vrms signal from the resolver, and this may not match up with
your resolver’s specification. This is generally OK. RMCWin will use the information you supplied
to calculate the correct reference output voltage to obtain 2 Vrms back from the resolver. Some
resolvers are specified for operation at 11 or 26 Volts. These resolvers will generally still work
well at 2 Volts, but there is some potential loss of accuracy and the signal-to-noise ratio will be
reduced. Contact Delta Computer Systems, Inc. to discuss options for your application.
Axis0 and Axis1 tabs:
Use these tabs to configure the Count Offset for each axis. The Count Offset is used to align the
zero point on the resolver with the machine zero without having to mechanically adjust the
machine. You can also set this value using the Zero Position/Set Target Command. If you use the
Z command you will need to save the value to non-volatile memory using the Update Flash
Command after you have completed the setup, or it will be lost when power is removed from the
RMC.
See also: