Baldor MN735 manual Proportional Gain P501, Integral P502, Method for Setting-up the PI Gains

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PI Terms PI is used to control the response of any closed loop system. It is used specifically in system applications involving the control of drives to provide zero steady state error between Setpoint and Feedback, together with good transient performance.

Proportional Gain (P501)

This is used to adjust the basic response of the closed loop control system. The PI error is multiplied by the Proportional Gain to produce an output.

Integral (P502)

The Integral term is used to reduce steady state error between the setpoint and feedback values of the PI. If the integral is set to zero, then there will always be a steady state error.

+ Error

Setpoint

(AIN1) –

Feedback (AIN2)

PGain

I Gain

dt

+	+
	Output

SFunctions as P, PI controller

SSingle symmetric limit on output

A Method for Setting–up the PI Gains

Underdamped (oscillatory)Critically Damped

OUTPUT

Overdamped

SETPOINT

4–12 Start–Up and Operation

MN735

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Contents MN735 Series 35D Inverter ControlTable of Contents Appendix B Appendix aSection Quick Start Power and Motor ConnectionsSize 1 and 3 Terminal Strips Remote ModeThermistor Connection to motor thermistor Power Connection DescriptionsTerminal Signal Name Description Range Analog/Digital Signal DescriptionsSection General Information Limited WarrantyOn next Product Notice Intended useCould result in damage to property Precautions To prevent equipment damage, be certain that the input power Location and Mounting Section Receiving & InstallationReceiving & Inspection Inverter Sizes Watts Loss Ratings Catalog No Output CurrentUngrounded Distribution System Power ConditioningInput Power Conditioning Impedance + Clamp Terminal Unshielded and Shielded CouplingsAWG MM2 Wire SizePower Connection Descriptions Power and Ground Connections Size 2 Shown Resistance thresholds are Rising temperature trip resistance One control to PE Receiving & Installation MN735 External Brake Resistor Keypad Connection Diagram Keypad ModeStandard Run Connection Diagram Standard Run 3 Wire ModeRelated Parameters Speed 2 Wire Mode10 Epot Connection Diagram 11 Epot Connection Diagram 12 PID Connection Diagram PID 2 Wire ModeReceiving & Installation MN735 Keypad Description Section Start-Up and OperationDrive Status Indications shown on keypad Diagnostics MenuDisplay Menu Level Remote to Local Reset to Factory Settings 2 button ResetSelect Local or Remote Quick Application Selection Password ProtectionParameter Definitions Display Parameter Description Range Factory SettingDisplay Parameter Description Range PI P Gain Analog Output Relay Invert =FALSE =TRUE Integral P502 Method for Setting-up the PI GainsProportional Gain P501 Current Power Dependent Parameters Inverter Size Factory SettingSaving Your Application Data Routine MaintenanceMaterial Recycle Disposal PackagingTrips Section TroubleshootingReset a Trip DC Link Ripple General FailuresGeneral Specifications Section Specifications & Product DataAnalog Inputs Control SpecificationsKeypad Display Digital Inputs Analog OutputsRelay Output Ratings CatalogDimensions Size 3 230VAC 3 Phase Size 1 and 2 230VAC 1 Phase460VAC 3 Phase Controls Size 2 and 3 460VAC Appendix a Dynamic BrakeTable A-1 External Brake Resistor Selection Appendix B CE Guidelines Wiring of Shielded Screened CablesCE Declaration of Conformity EMC Conformity and CE MarkingCabinet EMC Wiring TechniqueCable Screens Grounding EMC Installation InstructionsInput Signal Cable Grounding Tion Date 1/5/02 EC Declarations of ConformityStandard EMC Directive CE Guidelines MN735  Baldor Electric Company MN735 02 C&J Box Ft. Smith, AR 479 Fax 479