Relay Control - Only on/off control can be performed. - The frequency of failure or breakdown is high and maintenance is not easy. - Circuits are modified by changing wiring. - For large-scale systems, large space and long design period are required. - Identifying the cause of a failure or an error and replacing the failed device are not easy. Sequence Control - On/off control and complex control can be performed. - Reliability is high and maintenance is easy. - Circuits are flexibly modified by using programs. - Even for large-scale systems, large space and long design period are not required, offering flexibility and extendibility. - All failures and errors can be monitored. The failed device can be replaced easily. Reference : Mitsubishi's FA E-Learning
How did I first hear about this Pyramid? It was during my third year in Myanmar when my teachers, Aung Kyaw Nyein and Nyeinkyaw Lwin, introduced this topic. In fact, this concept is like a roadmap for Factory Automation, and that’s absolutely correct. For this summary, I’ll base it on the content written by Realpars. The Automation Pyramid consists of five layers: Field Level Control Level Supervisory Level Planning Level Management Level 1. Field Level This level includes devices such as actuators and sensors. In some texts, this layer is referred to as the Physical Layer. The main idea is that these components interact with the physical world and perform real-world tasks. 2. Control Level This level involves controllers like PLCs and PID controllers, which are essential for automation engineers. These systems control the devices at the Field Level. 3. Supervisory Level The third level includes SCADA and HMI systems, which provide graphical user interfaces. To...