Elexol Ethernet Digital "Ether I/O" Interface Module (DIP R) Big.LITTLE Processing. PID controller. Some applications may require using only one or two actions to provide the appropriate system control.
This is achieved by setting the other parameters to zero. A PID controller will be called a PI, PD, P or I controller in the absence of the respective control actions. PI controllers are fairly common, since derivative action is sensitive to measurement noise, whereas the absence of an integral term may prevent the system from reaching its target value due to the control action. History and applications[edit] Omap. Single board computers.