Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 264)

264 Rockwell Automation Publication 750-RM002B-EN-P - September 2013
Chapter 4 Motor Control
Sel] and P680 [Trq Ref B Sel], the output can be summed together and along
with the output of “Torque Trim,” to become P4 [Commanded Trq].
Figure 31 - Torque Control - Reference Scale and Trim
For additional and expanded illustration of the Torque Control, refer to the
PowerFlex 755 Control Block Diagrams starting on
page 375 .
The following are key parameters related to the Torque Reference control
illustrated in
Figure 30 and Figure 31 .
P313 [Actv SpTqPs Mode] - Active Speed Torque Position Mode
Displays the Speed, Torque, Position Mode that is active, based on the dynamic
selection of modes A, B, C, and D, per P309…P312 [SpdTrqPsn Mode
n], and
digital input conditions programmed via P181 [DI SpTqPs Sel 0] and P182 [DI
SpTqPs Sel 1]. In some cases, such as operation in the SLAT min/max modes, the
final regulation mode may be forced into Speed Regulation. Refer to the Speed,
Torque, and Position mode bits in P935 [Drive Status 1] that indicate the active
regulation mode of the drive when it is running.
P675 [Trq Ref A Sel] and P680 [Trq Ref B Sel] - Torque Reference A, B Select
Selects the source for a torque reference, used when the drive is configured to
command torque according to P309…312 [SpdTrqPsn Mode
n]. The values of
the torque reference sources are added together to provide a single torque
reference.
P676 [Trq Ref A Stpt] and P681 [Trq Ref B Stpt] - Torque Reference A, B
Setpoint
x
679 Trq Ref A Mult
+
( Analog In 1 )
675 Trq Ref A Sel
( Analog In 2 )
From DIO Option Card
( Disabled ) Trq Ref A Stpt
( Setpoint ) 676
x
684 Trq Ref B Mult
3,4
Other
0
1093
1079
PID Output Sel
PID Output Meter
(PID Torque Trim)
Other
0
3
Other
0
3
3 = Torque Excl
4 = Torque Trim
0.0
From DIO Option Card
Trq Ref B Stpt
4
Commanded
Trq
Default
677 Trq RefA AnlgHi
678 Trq RefA AnlgLo
*
Parameter
Selection
To Torq Ctrl,
Process Ctrl
1
195 DI Torque StptA
Bit
Source
Parameter
Selection
Default
( Analog In 1 )
680 Trq Ref B Sel
( Analog In 2 )
From DIO Option Card
( Disabled ) 0.0
From DIO Option Card
682 Trq RefB AnlgHi
683 Trq RefB AnlgLo
*
( Setpoint ) 681
0
Default
Parameter
Selection
* Note: Analog Hi, Lo
scaling only used when
Analog Input is selected