The Relationship And Difference Between The Touch Screen And HMI Display

The touch screen is HMI, but the touch screen is only one kind of man-machine interface. HMI also includes a non-touch screen, as well as an upper computer, text display, and so on. PLC connection is always a function of HMI and can realize man-machine interaction operation interface is HMI display.

The HMI display interface is a platform for the human operation ofPLC.The platform provides an interface between the program and human, is the medium and dialogue interface between human and computer to transfer and exchange information, is an important part of the computer system. It realizes the transformation between the internal form of information and the form that humans can accept. There is a man-machine interface in every field that participates in man-machine information exchange.

The touch screen is a kind of PLC man-machine interface, people can adjust parameters or monitor parameters by touching the button on the screen. But the man-machine interface is not necessarily all touch screen, some are installed on the operation panel with a number of buttons, and people through the button to monitor the operation of PLC. The screen is just for viewing parameters, and there is no touch function.

The touch screen is HMI display, but the touch screen is only one kind of man-machine interface. HMI display also includes a non-touch screen, as well as upper computer, text display and so on. PLC connection is always a function of the man-machine interface, can realize man-machine interaction operation interface is man-machine interface.

Strictly speaking, touch screen is a kind of input device with touch operation function of HMI display, in the factory with touch input function of HMI display is commonly called touch screen.