FFT with real-value input signal

The sample illustrates the implementation of a spectrum calculation with the function block FB_CMA_RealFFT.

The sample is available for download from here:
RealFFT_Sample.zip

Block diagram

FFT with real-value input signal 1:

Program parameters

The table below shows a list of important parameters for the configuration of the

RealFFT function block.

FFT length

2048

Forward calculation

TRUE

Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT v3.1.4018

PC or CX (x86, x64)

Tc3_CM, Tc3_CM_Base, Tc3_MultiArray