The role of machine tools, especially CNC machine tools, as working machines in various industries is well known. In the design and manufacture of machine tools, designers have been continuously improving the performance and appearance of machine tools. Compulsory course, a problem that plagues machine tool designers is the connection and takeover of machine tools. No matter how well the designer designs the appearance of the machine tool, once the pipeline is connected, you will find that the machine in front of you is like a pipe full of pipes The "heavy patient" of the wire. Another problem is the anti-interference and loose connection between the point-to-point control lines, power lines and signal lines. This is a problem that headaches electrical engineers in the field. The emergence of fieldbus technology is an effective solution to these problems. The question provides the gospel.
Field bus main features
1. Openness of the system
The traditional control system is a self-closed system. Generally, it can only communicate externally through the serial port or parallel port of the workstation. In fieldbus technology, users can compose products from different vendors into a system of any size according to their own needs and objects.
2. Operability and reliability
Under the condition that the fieldbus chooses the same communication protocol, as long as the appropriate bus network card, socket and adapter are selected, the information transmission and communication between the interconnected devices and systems can be realized, which greatly reduces the workload of wiring and wire inspection, and effectively improves the control. Reliability.
3. Intelligence and functional autonomy of field equipment
The signal transmission of traditional CNC machine tools is a one-way transmission of analog signals. The error in the signal transmission process is large, and it is difficult for the system to quickly determine the fault and run with fault. The fieldbus adopts two-way digital communication, and the functions of sensor measurement, compensation calculation, engineering quantity processing and control are distributed to the field equipment to complete the diagnosis, and the operation status of the equipment can be diagnosed at any time.
4. Adaptability to the on-site environment
The fieldbus is designed to work in the field environment. It can support twisted pair, coaxial cable, optical cable, radio frequency, infrared and power lines. It has strong anti-interference ability and can adopt two-wire system for power transmission and communication. And can meet safety and explosion requirements.