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Allen-Bradley PowerFlex 40P User Manual

Allen-Bradley PowerFlex 40P
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Page #182 background image
G-2 PID Set Up
Exclusive Control
In Exclusive Control, the Speed Reference becomes 0, and the PID
Output becomes the entire Freq Command. Exclusive Control is used
when A132 [PID Ref Sel] is set to option 1, 2, 3, 4 or 5. This
configuration does not require a master reference, only a desired set
point, such as a flow rate for a pump.
Example
In a pumping application, the PID Reference equals the Desired
System Pressure set point.
The Pressure Transducer signal provides PID Feedback to the drive.
Fluctuations in actual system pressure, due to changes in flow, result
in a PID Error value.
The drive output frequency increases or decreases to vary motor
shaft speed to correct for the PID Error value.
The Desired System Pressure set point is maintained as valves in the
system are opened and closed causing changes in flow.
When the PID Control Loop is disabled, the Commanded Speed is
the Ramped Speed Reference.
+
PID Prop Gain
PID Loop
PID Integ Time
PID Diff Rate
PID Enabled
PID Fdbk
PID Ref
PID
Error
+
+
+
PID
Output
Accel/Decel
Ramp
Freq
Command
Pump
PID Feedback =
Pressure Transducer Signal
PID Reference =
Desired System Pressure

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Allen-Bradley PowerFlex 40P Specifications

General IconGeneral
BrandAllen-Bradley
ModelPowerFlex 40P
CategoryController
LanguageEnglish

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