DCS - (Distributed Control System), a distributed control system is a control system for a production line, a process or any other dynamic system in which the controllers are not centrally located at a place that is distributed across the system with each subsystem controlled by one or more controllers.

Today's DCS system is developed with 4 great advantages:

- High level of control: most DCS systems include integrated controllers, communication networks and operating system software. Therefore, the DCS is capable of managing a lot of I / O points

- Flexible configuration: thanks to the dual redundancy in all components, DCS has the ability to change programs, change the structure of the system or add or remove components without interrupting or restarting process

- Low error rate: by design, DCS systems often have open systems, high integration capabilities with different PLCs that control the machines and production stages independently. Therefore, DCS has a low error rate, so the control in factories or factories will be both cost-effective and easy to maintain and operate

- Availability and reliability: modern DCS distributed control systems have mechanisms for redundancy, safety, failure restart, as well as maintenance, diagnostics and indication modes. error. In addition, the DCS systems also allow users to set security modes to restrict and control data access rights and control

It has been 40 years since the first DCS product, TDC2000 manufactured by Honeywell was released in 1975, ever since, DCS products have been continuously evolving and improving, and DCS has been adopted. widely in process automation, factories and buildings.