Process plants are operated across a wide range of industries. This includes producers of food, wood, steel, metal-based products, chemicals and many more. These factories have a typical lifespan of more than 20 years and must be safe for people, product and environment. The vision of Industry 4.0 or Industrial Internet of Things (IIoT) is to connect all sensors and actuators to a converged Information Technology/Operational Technology (IT/OT) network and control them using a process control system from the outside. As more devices become connected to the network, a wider, real-time view of the plant is available through management systems. Optimization based on the collected data delivers significant productivity gains while reducing operating costs and energy consumption.