Digital Control System

The digital control systems are going populartoday because of readily available inexpensivemicrocomputers and peripheral devices. Adigital controller has versatility to change ormodify its control function by changing ormodifying its program instructions (in analogcontrollers it is modified by changing itshardware). In other words digital controller hasdistinct advantage over analog that it can bemodified by software only where in analogworld it is hardware only.