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PIDAT - PID controller with relay autotuner

It is necessary to install Java and import our certificate for Java applets to run the virtual laboratories. A step-by-step tutorial is available.


The simulator demonstrates all features of PIDAT function block - PID controller with relay autotuner. The tuning algorithm is based on adaptive relay experiment which identifies frequency response sample with a given phase shift. The process model is build internally using one sample of frequency response. Finally the controller parameters are computed from the internal tables. The simulator demonstrates the PID loop tuning including noises. The detailed description is available in the reference manual.

How to start the applet?

Before starting the simulator by START start.gif, 648B button, the sampling period can be set in the field Sampling time. The continous applet running can be stopped by STOP stop.gif, 666B button or paused by PAUSE pause.gif, 1,1kB button. The simulation speed can be adjusted by the slider. The re-init button reinit.png, 858B reset all parameters to initial state.

All parameters of active blocks (non-shadow) can be changed in the dialog which is invoked by cliking at the block. Detailed description of block parameters is available in Function blocks reference manual.