ABB RCNA-01 Manual de usuario descargar pdf (Pagina 277)

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Parameter listing and descriptions 273

ACH550-01 User's Manual

4003 DERIVATION TIME 0.0…10.0 s

Defines the derivation time of the PID controller.

• You can add the derivative of the error to the PID controller output.

The derivative is the error value’s rate of change. For example, if the

process error value changes linearly, the derivative is a constant

added to the PID controller output.

• The error-derivative is filtered with a 1-pole filter. The time constant of

the filter is defined by parameter 4004

PID DERIV FILTER.

0.0 – Disables the error-derivative part of the PID controller output.

0.1…10.0 – Derivation time (seconds).

4004 PID DERIV FILTER 0.0…10.0 s

Defines the filter time constant for the error-derivative part of the PID

controller output.

• Before being added to the PID controller output, the error-derivative is

filtered with a 1-pole filter.

• Increasing the filter time smooths the error-derivative, reducing noise.

0.0 – Disables the error-derivative filter.

0.1…10.0 – Filter time constant (seconds).

4005 ERROR VALUE INV 0=NO, 1=YES

Selects either a normal or inverted relationship between the feedback

signal and the drive speed.

0 =

NO – Normal, a decrease in feedback signal increases drive speed.

Error = Ref - Fbk.

1 =

YES – Inverted, a decrease in feedback signal decreases drive

speed. Error = Fbk - Ref.

Code Description Range

100%

Gain

Process error value

P 4003

D-part of the controller output

PID output

Error

P 4001

1 2 ... 272 273 274 275 276 277 278 279 280 281 282 ... 473 474

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ABB RCNA-01 Manual de usuario Pagina 277

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