Batch Control: Controller- versus Server-Based Sequencers

摘要

When designing a batch system, engineers often select the control solution based on the size of the system. It is traditionally thought that small batch systems require a controller-based sequencing solution, while larger systems require a server-based solution. However, despite traditional practices, the size of the system is not always the best indicator of an appropriate solution. A small application or single-unit system may have complex requirements. For example, it may need to be capable of managing hundreds of recipes or may contain complex decisions or paths based on process conditions.