Delta Electronics VFD-EL manual Group 10 PID Control, 10.11, 10.02

Chapter 4 Parameters

Group 10: PID Control

10.00PID Set Point Selection

Factory Setting: 0

Settings 0 Disable

1Digital keypad UP/DOWN keys

2AVI 0 ~ +10VDC

3ACI 4 ~ 20mA

4PID set point (Pr.10.11)

10.01Input Terminal for PID Feedback

		Factory Setting: 0
Settings	0	Positive PID feedback from external terminal AVI (0 ~ +10VDC)

1Negative PID feedback from external terminal AVI (0 ~ +10VDC)

2Positive PID feedback from external terminal ACI (4 ~ 20mA)

3Negative PID feedback from external terminal ACI (4 ~ 20mA)

Note that the measured variable (feedback) controls the output frequency (Hz). Select input terminal accordingly. Make sure this parameter setting does not conflict with the setting for Pr.10.00 (Master Frequency).

When Pr.10.00 is set to 2 or 3, the set point (Master Frequency) for PID control is obtained from the AVI or ACI external terminal (0 to +10V or 4-20mA) or from multi-step speed. When Pr.10.00 is set to 1, the set point is obtained from the keypad.

Negative feedback means: +target value – feedback

Positive feedback means: -target value + feedback.

10.11	Source of PID Set point		Unit: 0.01
	Settings	0.00 to 600.0Hz	Factory Setting: 0.00
This parameter is used in conjunction with Pr.10.00 set 4 to input a set point in Hz.
10.02	Proportional Gain (P)		Unit: 0. 1
	Settings	0.0 to 10.0	Factory Setting: 1.0

This parameter specifies proportional control and associated gain (P). If the other two gains (I and D) are set to zero, proportional control is the only one effective. With 10% deviation (error) and P=1, the output will be P x10% x Master Frequency.

4-100 Revision August 2008, 2ELE, V1.02