Abstract: The paper is about the control of different processes. Here the control action is distributed and monitoring can be done in a system which means monitoring is centralized. Real time data acquisition and control can be done using the ABB distributed control system. We can take level, pressure, temperature processes where the control action is distributed. AC800M microcontroller in the Field control unit (FCS) acquire the real time data of the process and those process variables are communicated to the monitoring system which has been installed with compact control builder AC800M software through the Ethernet cable. The set point has given in the system and depending upon the error between the process variable and Set point, the control action has done. The field instrumentation and control system have to be integrated properly and must function optimally to achieve such a goal.

Keywords: Level process, ABB Distributed control system.