Explain the difference between SCADA and HMI, can we use HMI to implement a SCADA SYSTEM
SCADA is software that can visualize multiple systems or PLC’s and the software is installed in a PC with above average specifications and can perform complex operations and store data and most cases it controls the systems from a remote position like a control room.
HMI is a screen that is installed near a single system and usually, it is only connected to a single PLC and with it, you visualize that system and control it, think of it as local control. SCADA means Supervisory control and data acquisition. This is the whole system consisting of many sensors and controls.
HMI is the Human-machine interface and this can be used to control the PLC in a programmed manner.