Bumpless transfer demo

The simulator shows the special connection of PID controller in order the reject rapid changes in manipulated variable (mv) when the controller mode (MAN/AUT) is switched - called often bumpless transfer or bumpless control. The tracking controller input tv is used. When the PIDU controller is switched between MAN and AUT mode, both inputs sp (setpoint) and hv (hand value) have the same value. The UP and DN button can be used for smooth change of setpoint.

How to start the simulator?

Before starting the simulator (applet) by START button, the sampling period can be set in the field Sampling time. The continous applet running can be stopped by STOP button or paused by PAUSE button. The simulation speed can be adjusted by the slider. The re-init button 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.