Online model predictive control of industrial processes using low level control hardware: A pilot-scale distillation column case study

Throughout the years, the computing power of industrial controllers has steadily increased. Together with the development of efficient quadratic program (QP) solvers, this raises the question whether these devices can host an online model predictive controller (MPC). The applicability of online MPC is investigated using a programmable automation controller (PAC) and a programmable logic controller (PLC) for the control of an industrially relevant process, i.e., a pilot scale distillation column. It is demonstrated that both devices are capable of hosting MPC, however the limitations of the PLC are reached for the investigated set-up. Finally, guidelines and pitfalls for use in practice are highlighted.