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Create Gain (PI » Academic) (G Dataflow)

Last Modified: December 18, 2017

Returns PI gains of a PI controller in the Academic form.

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integral unit

Unit associated with the integral gain.

This input accepts a ring or an array of rings.

Name Value Description
Hz 0 Specifies that the integral gain is expressed in Hz.
s 1 Specifies that the integral gain is expressed in seconds.
min 2 Specifies that the integral gain is expressed in minutes.

Default: The default value of this input changes depending on the data type you wire. If you wire a ring to this input, the default is s. If you wire an array of rings to this input, the default is Hz.

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proportional unit

Unit associated with the proportional gain.

The relationship between the available units is K = 100/PB.

This input accepts a ring or an array of rings.

Name Value Description
Gain (K) 0 Specifies that the proportional gain is expressed in terms of proportional gain (K).
Band (PB) 1 Specifies that the proportional gain is expressed in terms of proportional band (PB).

Default: Gain (K)

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proportional

Value of the proportional component of the controller.

This input accepts a double-precision, floating-point number or an array of double-precision, floating-point numbers.

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integral

Value of the integral component of the controller.

This input accepts a double-precision, floating-point number or an array of double-precision, floating-point numbers.

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action

Action of the controller.

This input accepts a ring or an array of rings.

Name Value Description
Reverse 0 The controller is reverse-acting.
Direct 1 The controller is direct-acting.

Default: Reverse

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PI gains

Proportional gain and integral gain parameters of the controller.

This output can return a cluster or an array of clusters.

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proportional

Proportional gain of the controller.

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integral

Integral gain of the controller.

Algorithm Definition

The following transfer function represents a PI controller in the Academic form:

C i ( s ) = K c ( 1 + 1 T i s )

where Kc is the proportional gain and Ti is the integral time constant.

Where This Node Can Run:

Desktop OS: Windows

FPGA: This product does not support FPGA devices

Web Server: Not supported in VIs that run in a web application


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