FAQ# DRV-5JF38P Published: 11/28/2005
Question:Which PID parameters require set-up when configuring the GPD506 / P5 drive for PID pumping applications?
Answer:There are many parameters in the GPD506 / P5 drive that affect the operation of a PID loop but only a few should be changed initially.
Refer to the GPD506/P5 instruction manual for more details

The parameters listed below show their description, factory setting, and the values that should be set when first programming the drive for pump applications.
REFER TO PAGE(S)
PARAMETER DESCRIPTION FACTORY SETTING INITIAL SETTING IN TECH MANUAL

N084 PID Selection Disabled Enabled D = FDBK 5-45, A1-12

Function: Allows the PID function to be activated.
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N085 Feedback Calibration 1.0 .93 5-47, A1-12
Gain

Function: Used to adjust the feedback signal level.
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N086 Proportional Gain 1.0 3 or 4 5-47, A1-12

Function: It is the value by which the error signal is multiplied to generate the new speed reference. As the proportional gain is raised, the feedback signal will start tracking closer to the setpoint. If the proportional gain is set too high, the VFD will start oscillating and not maintain the setpoint. Ideally, the proportional gain should be set to a point just below where the VFD starts oscillating in speed when the feedback signal is upset.
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N087 Integral Gain 10 seconds 3 or 4 5-48, A1-12

Function: It determines how fast the integral gain increase is added to the control loop. The longer the integration time, the larger the integration window is. This results in slowing the VFD response to any change in the feedback signal. In most pumping applications, the integral time should be short to respond quickly to changes in the feedback signal. If this value is too large for the application, the VFD response will be sluggish. Conversely, if the value is too small for an application, the feedback signal may never reach the setpoint and constantly be hunting around the correct value.
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N093 PID Output Selection Not Inverted Not Inverted A1-13

Function: Determines whether or not the PID output is inverted.
------------------------------------------------------------------------------------------------------------------------------------------ N002 Operation Mode Seq= TRM, Ref=TRM See Note 1 5-46, A1-1
Selection

Function: Determines where the Run command and speed reference will come from.

Note 1:

If using an External Run command at Terminals S1 / SC and the setpoint adjustment will be from digital operator then N002 = (Seq = TRM, Ref = OPR)

If both the Run command and set point adjustment will be from the digital operator then N002 = (Seq= OPR, Ref = OPR)
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N043 Analog Input FV=MSTR, FI =AUX FV=AUX, FI=MSTR 5-15, 5-46, A1-6
Selection

Function: Determines the terminal where the master and auxiliary references will come from.
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N044 Terminal FI Signal 4-20mA See Note 2 5-15, 5-46, A1-6
Level Selection

Function: Specifies if the feedback signal will be 4-20mA or 0-10VDC.

Note 2:

If a current signal: Set N044 = 4-20mA

If a voltage signal: Set N044 = 0-10V DC (Jumper J1 on the control board of drive must then be cut)
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For more information please see "Link to related files" below.

Product Information:

Product Group:Inverters/Drives
Product:P5 GPD506 Drive, P5 Drive 600 Volt
Applications:
Category:PID Application

Other Information:

Link to related files:GPD506/P5 Technical Manual

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