A system and method for sharing input and output data based on communication

Abstract

The invention discloses a communication-based input output data sharing system and method. The system comprises a plurality of unit control devices connected through a network and a data server performing sharing data management; each unit control device comprises a controller, input and output equipment and a storage unit; and each storage unit comprises at least one share data area (SDA) and at least one receive data area (RDA), each share data area (SDA) is used to store input and output data for sharing the corresponding unit control device by other unit control devices, and each receive data area (RDA) is used to store input and output data shared from other unit control devices. Sharing of the input and output data between the different unit control devices is achieved through communication, and a traditional mode that input and output data is obtained through an external hard-wired line of a control device is prevented; and repeat setting of input and output equipment of a control system is reduced, and interactive applications of data of the whole control system and intelligent control based on the data can be achieved.

Description

technical field [0001] The invention relates to the field of industrial automation control, in particular to a communication-based input and output data sharing method, system and method. Background technique [0002] Most modern control systems adopt an object-oriented distributed control structure, which decomposes the system control task into several unit control tasks for equipment, which are completed by relatively independent unit control devices. The respective input and output devices and controllers of the unit control device form a complete and independent unit control device. No matter how far the input and output devices are from the controller, they need to be connected to the controller of the unit control device through external wiring. The input and output data of two independent unit control devices are not shared, exchanged and utilized across units. [0003] At the same time, if two different unit control devices A and B need to collect the same analog si...

AI Technical Summary

Problems solved by technology

[0005] 1. Each unit control device needs to establish its own complete input and output equipment for control needs, and each unit control device can only rely on the data detected by itself to achieve control, regardless of the information of the relevant unit control device, so it cannot be realized Linked Control, Shared Control, and Data-Based Smart Control

[0006] 2. Due to the characteristics of the industrial site, the input signal and output control of the control system may be distributed in a far place, and a long control cable needs to be laid

On the other hand, even if two independent unit control devices that are very close to each other need to monitor the same analog data, the configuration of sensors and analog acquisition modules of the control system must be added, resulting in a complex structure and an increase in configuration.

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