An approach in the implementation of control systems using `batchengine' technique

摘要

The batch engine, a flexible batch control implementationtechnique enabling the user to implement and configure real-time batchcontrol applications without the need for system analysts andprogrammers, is discussed. The batch engine is entirely different fromthe conventional programmable logic controller (PLC) software. Thesupervisory and PLC software are integrated to allow new installationsand modifications in the plant without making changes to the PLCsoftware. A distributed architecture is used to implement the batchengine technique. In the functional architecture of the batch engine,PLCs are dedicated to real-time analog discrete input/output (I/O)control, fault detection, and activity block sequencing. Thehuman-machine interface (HMI) stations are used for process graphics,variable trending, semiautomatic operation, manual-off-auto control, andanalog discrete I/O monitoring. Higher-level functions like inventorymanagement, batch monitoring/control, batch data reporting, recipemanagement, batch scheduling, and high-level facility interface aresupported by the batch supervisor. The HMI workstations act as a backupsupervisor in case of batch supervisor failure. The batch engine is wellsuited for applications that require the flexibility to expand thephysical configuration with equipment of similar functionality