What is the difference between a PLC, HMI and SCADA system?

A PLC (programmable logic controller) is the industrial computer that is responsible for carrying out control logic for your system including sequencing operations, reading sensor inputs and triggering outputs. An HMI (human machine interface) is the touchscreen or panel showing an interface that enables operators to monitor and interact with the PLC in real time. A SCADA (supervisory control and data acquisition) system gives a high-level view of multiple PLCs or an entire facility, so they can log information, alarm, trend, and remotely monitor. Adgo designs, programs and integrates all three components through a holistic industrial automation system.

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