Chapter 6 - Parameter Description [FU2]

[P Control] This is to compensate the error of a system proportionally. This is used to make the controller response fast for an error. When P control is used alone, the system is easily affected by an external disturbance during steady state.

[I Control] This is to compensate the error of a system integrally. This is used to compensate the steady state error by accumulating them. Using this control alone makes the system unstable.

[PI control] This control is stable in many systems. If “D control” is added, it becomes the 3rd order system. In some systems this may lead to system instability.

[D Control] Since the D control uses the variation ratio of error, it has the merit of controlling the error before the error is too large. The D control requires a large control quantity at start, but has the tendency of increasing the stability of the system. This control does not affect the steady state error directly, but increases the system gain because it has an attenuation effect on the system. As a result, the differential control component has an effect on decreasing the steady state error. Since the D control operates on the error signal, it cannot be used alone. Always use it with the P control or PI control.

Related Functions: DRV-04 [Frequency Mode]

FU2-40 [Control Method]

I/O-01 ~ I/O-10 [Analog Signal Scaling]

EXT-15 ~ EXT-21 [Pulse Input Signals]

6-28

Page 120
Image 120
HP 30 30 manual Parameter Description FU2