A unit in batch control denotes a set of equipment and control devices for a specific process. A unit can be operated and monitored using a single unit block. For example, by assigning a unit block to a process unit, such as a reactor unit or a crystallization unit, operation and monitoring of the unit can be performed using a single block, which representing the entire process unit. Thus, operating a unit block actually means operating the entire process unit. Using a unit block dramatically simplifies the operation and monitoring of many instruments that have many tag names.

Unit Instrument Application(An Example of Reactor Unit)