Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 267)

Rockwell Automation Publication 750-RM002B-EN-P - September 2013 267
Motor Control Chapter 4
• “Psn Camming” (8) PowerFlex 755 – Drive operates as a position
regulator. P685 [Selected Trq Ref ] has the same source as in Sum mode.
The position control is active in Position CAM mode and uses its PCAM
Planner position and speed reference.
• “Psn PLL” (9) PowerFlex 755 – Drive operates as a position regulator.
P685 [Selected Trq Ref ] has the same source as in Sum mode. The
position control is active in Position Phase Lock Loop mode and uses its
PLL Planner position and speed reference.
• “Psn Direct” (10) – Drive operates as a position regulator. P685 [Selected
Trq Ref ] has the same source as in Sum mode. The position control is
active in Direct mode and uses its Direct Position Reference.
• “Psn SpdlOrnt” (11) PowerFlex 755 – Drive operates in the Positioning
mode to position the load side of a machine to P1582 [SO Setpoint].
These modes selections only apply to the Flux Vector control modes in P35
[Motor Ctrl Mode], options 3 “Induction FV,” 6 “PM FV,” and 10 “IPM FV.”
These parameters select between speed regulation, torque regulation, or position
regulation operation of the drive. The source of P685 [Selected Trq Ref ] is
determined by the selection in these parameters when P181 [DI SpTqPs Sel 0]
and P182 [DI SpTqPs Sel 1] have selected “Disabled” or selected bits that are
logic low. In P935 [Drive Status 1], three bits are provided that indicate the
Regulation mode of the drive when it is running. Bit 21 “Speed Mode” is set
when the drive is running with the speed regulator active. Similarly, Bit 22
“PositionMode” and Bit 23 “Torque Mode” indicate when their respective
regulation modes are active. Under some conditions, the active Torque mode can
be forced into Speed mode regardless of the setting of Speed/Torque/Position.
P313 [Actv SpTqPs Mode] indicates this and reflects the mode selection that is in
use.