Yaskawa Matrix Converter User Manual download pdf (Page 259)

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Setting Example

When the timer function input on time is longer than the value set in b4-01, the timer output function is turned

on. When the timer function input off time is longer than the value set in b4-02, the timer output function is

turned off. An example of timer function operation is given in the following diagram.

Fig 6.61 Timer Function Operation Example

 Using PID Control

PID control is a method of making the feedback value (detection value) match the set target value. By combin-

ing proportional control (P), integral control (I), and derivative control (D), targets (machinery) with play time

can be controlled.

The characteristics of the PID control operations are given below.

• P control: Outputs the amount of operation proportional to the deviation. The deviation can not be set to

zero using P control alone.

• I control: Outputs the amount of operation that integrates the deviation. Used for matching feedback value

to the target value. I control is not suited, however, to rapid variations.

• D control: Outputs the amount of operation derived from the deviation. Can respond promptly to rapid

variations.

PID Control Operation

To understand the differences between each PID control operation (P, I, and D, the variation in the amount of

operation (output frequency) is as shown in the following diagram when the deviation (i.e., the difference

between the target value and feedback value) is fixed.

Fig 6.62 PID Control Operation

b4-01 b4-02 b4-01 b4-02

Timer function input

Timer function output

Deviation

I control

Amount of operation

D control

Time

PID control

Time

P control

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Yaskawa Matrix Converter User Manual Page 259