System for achieving wire communication of no-address identification devices based on serial port

Abstract

The invention discloses a system for achieving wire communication of no-address identification devices based on a serial port. The system for achieving wire communication of no-address identification devices based on the serial port comprises a PC, an interface convertor, a communication controller and a plurality of no-address identification devices. The communication controller comprises a single-chip microcomputer minimal system, a first level converting circuit, an address selecting circuit, an address identification circuit and a second level converting circuit. The PC is bidirectionally connected with the first level converting circuit inside the communication controller through the interface convertor, the first level converting circuit is bidirectionally communicated with a single-chip microcomputer of the single-chip microcomputer minimal system, and a first circuit of the single-chip microcomputer is in circuit connection with the level converting circuits through the address selecting circuit, a second circuit of the single-chip microcomputer is bidirectionally connected with the address identification circuit, a third circuit of the single-chip microcomputer is bidirectionally connected with the address identification circuit, the level converting circuits are in communication connection with the no-address identification devices, and the level converting circuits send received communication control signals of the no-address identification devices to the address identification circuit.

Description

technical field [0001] The invention relates to the technical field of wired communication based on serial ports, in particular to a system for realizing wired communication of devices without address identification based on serial ports. Background technique [0002] In the 21st century, regardless of people's daily necessities, or industrial machines and systems, the rapid development of PC technology makes them more and more intelligent and networked. People's life and work have become more and more convenient and easy. At the same time, how to make good use of large old machines and systems, such as CNC machine tools, various smelting, chemical large-scale automation process / process systems and other equipment without address identification to serve the current production has attracted more and more attention. [0003] Compared with the current similar machines and systems, the precision of non-address marking equipment may not be very high, but it can still complete ce...

AI Technical Summary

Problems solved by technology

For this reason, people generally use the field bus to network them. A bus controller needs to be configured on the PC to realize the control of the network bus. Nodes need to be configured on each set of non-address-marked devices to set the address of the non-address-marked device and Complete the conversion of field bus and serial bus (device without address identification can only communicate through serial port) and the conversion of communication related protocols, the structure is complex and the operation is cumbersome

[0005] The existing technology can also use the serial bus to directly network multiple sets of non-address identification equipment concentrated in a certain industrial site, but this method will encounter some practical problems, such as installing a communication control on each set of non-address identification equipment. It is inconvenient to install and maintain the device; a communication controller only controls the communication of a set of devices without address identification, and the communication does not require high real-time performance. For the current microprocessor, it is a big deal That is to say, the processing capacity of the microprocessor in the communication controller is far from being fully utilized; the monitoring and operating room after networking are far away from the site of the equipment without address identification, and the vibration and other interference environments of the industrial site are relatively Bad, the reliability of the original communication protocol of the device without address identification will face some practical problems

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