Dual-data bus-type master-slave controller with built-in PLC function

Abstract

The invention relates to a dual-data bus-type master-slave controller with a built-in PLC function; the dual-data bus-type master-slave controller comprises a master controller unit, a slave controller unit, an analog quantity unit, a digital quantity unit and an algorithm execution unit; two data buses are arranged in the controller, wherein one common data bus is time-shared by the master controller unit and the slave controller unit, so sampling and outputting of the analog quantity unit and the digital quantity unit can be realized, and the master controller unit has absolute priority right of usage at any time, and the controller employs an address bus to carry out addressing operation; the controller completely isolates the functions of the master controller unit and the slave controller units, so regulated tasks can be independently finished, and high speed communication and data exchange can be realized, thereby ensuring function integration property and application expansibility of the whole controller; simultaneously, an external PLC and relative circuit configuration cost of an external sampling output can be saved, and cost of frequent upgrades of controller control chips can be saved.

Description

technical field

[0001] The invention relates to a dual data bus master-slave controller with a built-in PLC function, in particular to the technology of the controller's system architecture, function division and coordination work. Background technique

[0002] In the prior art, it is necessary to use equipment including a controller. In addition to implementing the corresponding control algorithm and completing the functions of the equipment, the controller also needs to sample and output the analog quantities required by the system, as well as to perform digital control for the system. Quantity sampling and output; in some applications, it also needs to have external display and communication functions. When the equipment using the controller itself is more complicated, or needs to deal with more external analog and digital quantities, or needs to have a strong display function, or needs to have more external communication functions, the controllers in the prior art often ...

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