Component: Control (DSP)

Author	Matrix Ltd
Version	1.2
Category	DSP

Control component

Allows for several types of control operations to be performed on a buffer. On/Off - Standard on off control as used on most overs, toasters, irons. P/PI/PID - Mathematical control process to get to the setpoint as fast as possible, similar to the process in the human brain when steering a car.

Examples

On/Off Control

Here is a basic example demonstrating on/off control.

File:On-Off Control.fcfx

If the Setpoint ADC is higher then the Feedback ADC plus the hysteresis value then the output will switch on.

If the Setpoint ADC is lower then the Feedback ADC then the output will switch off.

Downloadable macro reference

Process

Processes an entire buffer, either by performing the control operation to every value in the buffer or just the last value.

Parameters

INT Setpoint

Value to specify the required control setpoint

Return value

This call does not return a value

ProcessTick

Processes the current value from a buffer.

Parameters

INT Setpoint

Value to specify the required control setpoint

Return value

This call does not return a value

Simulation macro reference

This component does not contain any simulation macros

Property reference

Buffer Manager

This property is of type Fixed list of ints and can be referenced with the variable name buffer_manager.

DSP buffer manager to get the buffers from

Feedback

This property is of type Fixed list of ints and can be referenced with the variable name input_a.

Feedback buffer - used to pass the feedback reading into the control algorythm.

Output

This property is of type Fixed list of ints and can be referenced with the variable name output_c.

Output buffer - used to pass the control output values from the control algorythm.

Process

This property is of type Fixed list of ints and can be referenced with the variable name style.

Selects whether to process the entire buffer or just a single value when calling the Process macro

Method

This property is of type Fixed list of ints and can be referenced with the variable name method.

Specifies which control method will be used to process the buffer data

Proportional

This property is of type Signed integer and can be referenced with the variable name proportional.

P coefficient used to perform the Proportional calculation

Integral

This property is of type Signed integer and can be referenced with the variable name integral.

I coefficient used to perform the Integral calculation

Derivative

This property is of type Signed integer and can be referenced with the variable name derivative.

D coefficient used to perform the Derivative calculation