Delta PG-40 Spezifikationen PDF herunterladen (Seite 104)

VFD-B Series

5-69

Group 10: PID Controls

10 - 00

Input Terminal for PID Feedback

Factory Setting: 00

Settings 00 Inhibit PID operation; external terminals AVI, ACI might be used

for V/F control if required (Pr.02-00).

01 Input negative PID feedback from external terminal AVI (0 to

+10V).

02 Input negative PID feedback from external terminal ACI (4 to

20mA).

03 Input positive PID feedback from external terminal AVI (0 to

+10V).

04 Input positive PID feedback from external terminal ACI (4 to

20mA).

 Note that the measured variable (feedback) is 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)

The negative feedback is (+target value – feedback).

The positive feedback is (-target value + feedback).

10 - 01

Gain Over the PID Detection Value

Factory Setting: 1.00

Settings 0.00 to 10.00 Unit: 0.01

 This is the gain adjustment over the feedback detection value, which is utilized in

adjusting the inaccuracy between the target value and the measured value.

10 - 02

Proportional Gain (P) a

Factory Setting: 1.0

Settings 0.0 to 10.0

 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 one effective. With 10%

deviation (error) and P=1, the output will be 1/6 x P x10% x Master Frequency.

Note: The parameter can be set during operation.

10 - 03

Integral Gain ( I ) a

Factory Setting: 1.00

Settings 0.00 to 100.00 sec

0.00 disable

 This parameter specifies integral control (continual sum of the deviation) and associated

gain (I). When the integral gain is set to 1 and the deviation is fixed, the output is equal to

the input (deviation) once the integral time setting is attained.

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