Virtual control method for site controller

Abstract

The present invention relates to building self control field, especially a field control unit virtual control method. The present invention maps field control unit data as field control unit BACnet protocol object, utilizing tide list object reading field control unit inner history data through BACnet protocol read range service, thereby to substitute physical control unit which needs controller but without I / O point connection, using standard BACnet object and service pattern to access other system disagreed with BACnet protocol into field control system, mapping powerful database server as standard BACnet object for other controller reading data. After system existing virtual controller, workstation software no longer needs any special function (such as MODBUS protocol, OPC interface, data base interface etc), as long as capable of realizing standard BACnet protocol, only needing providing convenient man-machine interface.

Description

technical field [0001] The invention relates to the field of building automatic control, in particular to a virtual control method of a field controller. technical background [0002] The on-site controller is virtualized by the workstation software on the network. The traditional on-site controller is master-slave mode, and the slave controller (also known as the third-party controller) controls the work of the physical controller through the processing of the control signal by the on-site controller. like figure 1 As shown in , the workstation software running in the on-site controller needs to distinguish between the server and the client, and has high requirements for the configuration of the server, its own performance and network speed, resulting in a bottleneck in the performance of the server. At the same time, the operation of the database It is necessary to know the specific data structure and database engine, which makes the process of secondary development compl...

AI Technical Summary

Problems solved by technology

[0002] The on-site controller is virtualized by the workstation software on the network. The traditional on-site controller is master-slave mode, and the slave controller (also known as the third-party controller) controls the work of the physical controller through the processing of the control signal by the on-site controller. like figure 1 As shown in , the workstation software running in the on-site controller needs to distinguish between the server and the client, and has high requirements for the configuration of the server, its own performance and network speed, resulting in a bottleneck in the performance of the server. At the same time, the operation of the database Need to know the specific data structure and database engine, which leads to complicated secondary development process and high cost

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