A Human Machine Interface (HMI) is a device or system used to enable human-machine information interaction and control operations, and it is an important component of industrial control systems. The purpose of HMI design is to make human-machine interaction as convenient, intuitive, and easy to understand as possible, thereby improving system usability and operational efficiency.
The main functions of a human-computer interface include the following:
Display parameters and status: Through the human-machine interface, operators can intuitively understand the parameters and status information of the equipment in order to perform operation and maintenance.
Control and execution operations: The human-machine interface can implement control commands for the equipment, such as start, stop, and adjustment.
Alarm and diagnostic functions: When the system malfunctions, the human-machine interface can promptly issue an alarm and diagnose the error.
Data recording and storage: The human-machine interface can record and store various data during the operation of the equipment, such as production data and equipment operating conditions.
When designing a human-machine interface (HMI), factors such as ease of use, reliability, and security need to be considered, along with the selection of suitable components such as displays, controllers, and input devices. Furthermore, to enhance the intelligence level of the equipment, the HMI typically needs to connect with devices such as PLCs, data acquisition systems, and instruments for data exchange and communication.
