Pid Control; Input Terminal For Pid Feedback; Gain Over The Pid Detection Value; Proportional Gain (P) - Delta VFD-B User Manual

Chapter 5 Parameters|VFD-B Series
Group 10: PID Control
10 - 00

Input Terminal for PID Feedback

Settings
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.02-00 (Master Frequency).
When Pr.02-00 is set to 01 or 02, the set point (Master Frequency) for PID control is obtained
from the AVI/ACI external terminal (0 to +10V or 4-20mA) or from multi-step speed. When
Pr.02-00 is set to 00, the set point is obtained from the keypad.
Negative feedback means: +target value - feedback
Positive feedback means: -target value + feedback.
10 - 01

Gain Over the PID Detection Value

Settings
This is the gain adjustment over the feedback detection value. Refer to PID control block
diagram in Pr.10-06 for detail.
10 - 02

Proportional Gain (P)

Settings
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.
NOTE
The parameter can be set during operation for easy tuning.
5-96
00 Inhibit PID operation: external terminals AVI, ACI may be used for
frequency command if required (Pr.02-00).
01 Negative PID feedback from external terminal AVI (0 ~ +10VDC).
02 Negative PID feedback from external terminal ACI (4 ~ 20mA).
03 Positive PID feedback from external terminal AVI (0 ~ +10VDC).
04 Positive PID feedback from external terminal ACI (4 ~ 20mA).
0.00 to 10.00
0.0 to 10.0
Factory Setting: 00
Factory Setting: 1.00
Factory Setting: 1.0
Revision July 2008, BE16, SW V4.08 & V5.00
Unit: 0.01
Unit: 0.01