Inter-automation device signal transition coupling method

Abstract

The invention belongs to the industrial process control technical field, and specifically relates to an inter-automation device signal transition coupling method based on a control program; a DCS realoutput controlled variable expression is listed as: u1=4+0.16x, a DCS output object controlled variable expression is listed as: u2=7.2+0.128x, wherein u1 refers to the real output controlled variable, u2 refers to a DCS real time output controlled variable estimated value with an execution variable and an operation variable changing along proportions, and x refers to a controller input variable;two said expressions are subtracted so as to obtain a controlled variable difference: [delta]u=u2-u1=3.2-0.032x; to eliminate the deviation between the execution variable and the operation variable is to modify the controller output controlled variable as the DCS output object controlled variable; an object control mathematics model expression with the execution variable and operation variable changing along proportions is listed as: u3=u1+3.2-0.032x. An air-valve remote operation control system in a Lanzhou Uranium Corp air-conditioning production process can use the control program to realize the system inter-automation device signal transition coupling method; the control system is stable and reliable in operation after being put in service.

Description

technical field [0001] The invention belongs to the technical field of industrial process control, and in particular relates to a matching method for realizing signal conversion between automation devices by using a control program. Background technique [0002] In a general process control system, when the input and output signals between automation devices do not match, a signal conversion device is usually used for signal conversion to match the output signal of the previous device with the input signal of the latter device to achieve accurate measurement and control. [0003] In the air-conditioning production system of Blue Uranium Company, the remote operation control of the air valve is realized by the DCS system, and each air valve control system is composed of a controller (DCS system operation station, process station), current and voltage signal converter, and air valve actuator , the schematic diagram of the air valve remote operation control system is as follows...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method to realize the matching of conversion signals among the automatic devices of the control system by the control program, so as to solve the problem that the execution amount of the actuator does not match the operation amount in the remote operation control system of each air valve in the air-conditioning production process, and the actuator cannot Accurately implement the control amount, and the DCS system shows that there is a large negative deviation between the air valve execution amount and the operation amount, so as to realize the accurate operation control of each air valve; at the same time, in order to avoid the development and processing of the signal conversion device, and its online batch replacement , saving large investment costs and manpower; and avoiding the large production and personal safety risks in the process of implementing the signal conversion device replacement operation, ensuring production and personal safety

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