HMI (Human Machine Interface)-- operator and machine equipment between the two-way communication bridge.
The definition of HMI:
Connect programmable controller (PLC), frequency converter, DC governor, instrument and other industrial control equipment, using display, through input unit (such as touch screen, keyboard, mouse etc.) write working parameters or input operation command, Human and machine information to achieve the interaction of digital equipment, composed of hardware and software.
The compose and principle of HMI:
The HMI product consists of two parts: hardware and software. The hardware includes processor, display unit, input unit, communication interface, data storage unit, etc. The performance of the processor determines the performance of the HMI product. Is the core unit of HMI. According to the product grade of HMI, the processor can choose 8 bit, 16 bit and 32 bit processor respectively.
The HMI software is generally divided into two parts: the system software running in the HMI hardware and the picture configuration software (such as JB-HMI picture configuration software) running under the Windows operating system of the PC machine.
Users must first make "engineering files" with HMI's picture configuration software, and then download the "engineering files" to the HMI processor through the serial communication port between PC machine and HMI products.