126 Rockwell Automation Publication MOTION-UM003K-EN-P - January 2019
Chapter 5 Configure Integrated Motion Using a PowerFlex 755 Drive
2. Click Apply and OK to exit the Motor Feedback dialog box.
3. Set the commutation alignment type and the percentage of offset.
If you are using a motor that is not in the database, the default is Not
Aligned. If the motor is in the database, the alignment is set to
Controller Offset.
4. Go online with the controller and click Test Commutation.
When the test is complete, you see the status of the polarity.
The AXIS_CIP_DRIVE axis properties Motor Feedback category recognizes
the support of selectable Effective Resolution as defined in the Add-on Profile
(AOP) schema for version 28 controller projects. The Motor Feedback
category also lets you select between the choices that are presented. Logix
Designer application version 28 modifies the feedback types that define
support for the 20-bit fixed Effective Resolution in current PowerFlex 755
schemas. The default selection for Nameplate data sheet is 20 bit. Version 28
modifies the feedback type to add the new 24-bit fixed Effective Resolution to
the schema. You must select the Effective Resolution field to configure for 24
bit. This modification is in addition to the new SSI Digital support that was
added for Major Revision 12 of the PowerFlex 755 drives.
TIP All commutation attributes apply only to permanent
magnet motors.
Table 39 - Commutation Alignment Types
Type Description
Not Aligned Not Aligned indicates that the motor is not aligned, and that the
Commutation Offset value is not valid. If the Commutation Offset is not valid,
the drive cannot use the value to determine the commutation angle. Any
attempt to enable the drive with an invalid commutation angle results in a
Start Inhibit condition.
Controller Offset It applies the Commutation Offset value from the controller to determine the
electrical angle of the motor.
Motor Offset The drive derives the commutation that is offset directly from the motor.
Self-Sense The drive automatically measures the commutation that is offset when it
transitions to the Starting state for the first time after a power cycle. This
process generally applies to a PM motor equipped with a simple incremental
feedback device.
To Next Page
Loading...
Need help?
General
