Communication method of automatic control equipment based on upper and lower computer structures

Abstract

The invention discloses a communication method of automatic control equipment based on upper and lower computer structures. A template data processing module is arranged in an upper computer system. A query / response mechanism general communication method processing module is arranged in the lower computer system. The template data processing module dynamically generates query / response protocol general communication data in accordance with template data according to a parameter set to external equipment by a user and downloads the general communication data to the lower computer system. The query / response mechanism general communication method processing module reads the general communication data of the corresponding equipment when it is needed, analyzes the data, communicates with the external equipment and returns the received response data to the upper computer system. By using the method of the invention, supports to the new equipment and the new communication protocol can be realized under the condition that system software is not updated so that software updating and maintenance costs after the new equipment is added are greatly reduced, an automatic control mode is flexible and is convenient for capacity expanding.

Description

[0001] The invention relates to a communication method, in particular to an automatic control device based on upper and lower computer structures, a communication method capable of supporting new devices and new communication protocols without replacing system software, and belongs to the field of automatic control equipment production . Background technique [0002] At present, in the field of industrial automation control, communication protocols based on query / response mechanisms are widely used, such as I2C, SPI, serial communication (RS232, RS422, RS485, etc.), CAN bus and other bus interfaces are widely used. letter of agreement. [0003] In order to realize communication with the above-mentioned bus devices, the current method is to solidify the corresponding communication protocol in the form of hard coding in the local system, and use the communication protocol to communicate with the corresponding device. There is a problem in this method: when a device or communica...

AI Technical Summary

Problems solved by technology

There is a problem with this method: when it is necessary to add a device or communication protocol that cannot be supported in the current system, it is impossible to support the new device (using a new communication protocol) without modifying the system code

This method will inevitably increase the post-maintenance cost of the system, increase the difficulty of software version management, and bring additional maintenance troubles to customers, which is not conducive to the expansion of automation control equipment and the development of the automation control industry.

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