◾ Field level: Beginning on the bottom of the pyramid is what we will refer to as the field level. These are the devices, actuators, and sensors that you see in the field or on the production floor. ◾ Control level: The next level is referred to as the control level. This is where the #PLCs and PIDs come into play. The control level uses these devices to control and run the devices in the field level that do the physical work. ◾ Supervisory level: The third level of the automation pyramid is kno