Table Of Contents

On-Off Controller (G Dataflow)

Version:
Last Modified: March 31, 2017

Implements an on-off controller.

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action

Action of the controller.

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

Default: Reverse

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reset

A Boolean that specifies whether to reset the internal parameters, such as the integrated error, of the controller.

True Resets the internal parameters.
False Does not reset the internal parameters.

Set reset to True if your application must stop and restart the control loop without restarting the entire application.

This input accepts an array of Booleans if setpoint is an array.

Default: False

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setpoint

Setpoint value, or desired value, of the process variable.

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

Default: 0

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process variable

Measured value of the process variable.

This input accepts an array of double-precision, floating-point numbers if setpoint is an array.

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controller hysteresis

Hysteresis of the controller.

This input accepts an array of double-precision, floating-point numbers if setpoint is an array.

Default: 0

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dt

Loop-cycle time, or interval in seconds, at which this node is called. dt must be greater than 0.

Default: 1

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minimum ON time

Minimum time for the controller to remain activated.

Default: 0

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minimum OFF time

Minimum time for the controller to remain deactivated.

Default: 0

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output

A Boolean that returns the status of the controller.

True The controller is on.
False The controller is off.
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error

Difference between the setpoint and the process variable.

Where This Node Can Run:

Desktop OS: Windows

FPGA: DAQExpress does not support FPGA devices


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