Choosing between a PLC and DCS for process applications

摘要

A step-by-step 'technology selection process' can help plant designers and system buyers identify which automation technology would best fit a particular plant application. Shady Yehia explains. PLC and DCS technologies were invented to serve different industrial processes yet the last 15 years have seen a merger of functionalities. Today both can serve some of the same application domains, and the overlap can make controller selection confusing.