Rockwell Automation 20B PowerFlex 70, PowerFlex 700 Reference Manual - Manual (Page 162)

Speed Control, Mode, Regulation & Vector Speed Feedback
162 Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
Figure 32 Sleep/Wake Function
Speed Control, Mode,
Regulation & Vector
Speed Feedback
The purpose of speed regulation is to allow the drive to adjust certain operating
conditions, such as output frequency, to compensate for actual motor speed losses
in an attempt to maintain motor shaft speed within the specified regulation
percentage.
The [Speed Mode] parameter selects the speed regulation method for the drive,
and can be set to one of 3 choices on the PowerFlex 70/700. The PowerFlex 700
Vector option has 5 choices. In addition, [Feedback Select] in the Vector option,
chooses the feedback used for the speed regulator.
•
Open Loop - No speed control is offered
•
Slip Comp - Slip Compensation is active – approximately 5% regulation
•
Process PI - The PI Loop sets the actual speed based on process variables
Drive
Run
Wake Up
Wake
Time
Example Conditions
Wake Time = 3 Seconds
Sleep Time = 3 Seconds
Wake Level
Sleep Level
Analog Signal
Go to Sleep
Sleep-Wake
Function
Start
Stop
Sleep Timer
Satisfied
Wake Timer
Satisfied
Wake Level
Satisfied
Sleep Level
Satisfied
Sleep
Time
Wake
Time
Sleep
Time
080 [Speed Mode]
Sets the method of speed regulation.
Default:
Options:
0
0
1
2
“Open Loop”
“Open Loop”
“Slip Comp”
“Process PI”
[Feedback Select]
Selects the source for motor speed feedback. Note
that all selections are available when using Process PI.
“Open Loop” (0) - no encoder is present, and slip
compensation is not needed.
“Slip Comp” (1) - tight speed control is needed, and
encoder is not present.
“Encoder” (3) - an encoder is present.
“Simulator” (5) - Simulates a motor for testing drive
operation & interface check.
Default:
Options:
0
0
1
2
3
4
5
“Open Loop”
“Open Loop”
“Slip Comp”
“Reserved”
“Encoder”
“Reserved”
“Simulator”
Standard
Vector