The crux of the distributed control system is its reliability as it is divided and distributed among the different nodes of a processing unit. This eliminates the risks of a system crash. Only a certain portion of the plant processor will be affected by any loss in the system. This contrasts with a centrally supervised system which will result in a total failure of the whole plant processor in case of any problem. Resultantly, quicker processing is ensured as the commands and controls are now localized.
A distributed control system encompasses different levels. Chiefly they all have their own functions and level of control.
- Level 0 consists of sensors and valves
- Level 1 consists of modules and electronic processors
- Level 2 consists of supervisory controls
Level 3 consists of controls on productions and targets
Over the passage of time, various updates have been made in this system like all other systems of the world. The updated version of the system which we see today includes:
- Wireless protocols
- Remote transmission
- Mobile control centers
- Installed web servers
Most of the systems in the modern world today have shifted or are shifting towards a distributed control system. By virtue of modern techniques and tools, we are now able to control a plant from the micro as well as macro-level from within and outside the boundary of the plant. In fact, it will get more standardize in coming years with raising awareness.