CN205721120U

CN205721120U - A kind of Programmable Logic Controller structure of hardware redundancy

Info

Publication number: CN205721120U
Application number: CN201620502473.6U
Authority: CN
Inventors: 唐茂杰; 岳增辉; 王秀杰
Original assignee: Yantai Pan Neng Electric Control System Co Ltd
Current assignee: Yantai Pan Neng Electric Control System Co Ltd
Priority date: 2016-05-30
Filing date: 2016-05-30
Publication date: 2016-11-23
Anticipated expiration: 2026-05-30

Abstract

This utility model relates to industrial control field, Programmable Logic Controller structure particularly to a kind of hardware redundancy, including DI On-off signal, input intermediate relay, Programmable Logic Controller one, Programmable Logic Controller two, DO output switch parameter and output auxiliary reclay, described DI On-off signal is respectively connected to Programmable Logic Controller one and Programmable Logic Controller two by input intermediate relay after being extended, the output of Programmable Logic Controller one with Programmable Logic Controller two is connected together and exports auxiliary reclay and be connected by described DO output switch parameter.Compared with prior art, this utility model simple in construction, low in energy consumption, use problem few, operating characteristics is excellent, is suitable for application.

Description

A kind of Programmable Logic Controller structure of hardware redundancy

Technical field

This utility model relates to industrial control field, particularly to the Programmable Logic Controller structure of a kind of hardware redundancy.

Background technology

At present, system reliability is required the highest industrial control system, generally use Programmable Logic Controller hardware redundancy system, redundant system includes two set Programmable Logic Controller hardware and corresponding switching control software and hardware, in single set of control device hardware fault or when safeguarding, another set of controller hardware still can be with action message.

The shortcomings such as but it is high that the redundant system that traditional Programmable Logic Controller producer releases exists price, and alternative model is few, model change is slow, and programming is complicated.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, this utility model intends providing the Programmable Logic Controller structure of a kind of hardware redundancy, this brand-new structure employs double set conventional programmable controller architecture to realize the hardware redundancy of Programmable Logic Controller, double set conventional programmable controllers run simultaneously, there is not switching problem, simplify the structure of Programmable Logic Controller hardware redundancy system, and solve problem present in use, achieve good effect and economic benefit.

A kind of Programmable Logic Controller structure of hardware redundancy, including DI On-off signal 1, input intermediate relay 2, Programmable Logic Controller 1, Programmable Logic Controller 24, DO output switch parameter 5 and output auxiliary reclay 6, described DI On-off signal 1 is respectively connected to Programmable Logic Controller 1 and Programmable Logic Controller 24 after being extended by input intermediate relay 2, and the output of Programmable Logic Controller 1 with Programmable Logic Controller 24 is connected together and exports auxiliary reclay 6 and be connected by described DO output switch parameter 5.

Compared with prior art, this utility model simple in construction, low in energy consumption, use problem few, operating characteristics is excellent, is suitable for application.

Accompanying drawing explanation

Fig. 1: schematic diagram of the present utility model；

In figure: 1, DI On-off signal；2, input intermediate relay；3, Programmable Logic Controller one；4, Programmable Logic Controller two；5, DO output switch parameter；6, output auxiliary reclay.

Detailed description of the invention

Embodiment one

DI On-off signal 1 starts the coil of input intermediate relay 2, input intermediate relay 2 adhesive, and the output contact one of input intermediate relay 2 and output contact two give Programmable Logic Controller 1 and Programmable Logic Controller 24 input signal respectively；The output contact of Programmable Logic Controller 1 and Programmable Logic Controller 24 starts the coil of output auxiliary reclay 6 after passing through DO output switch parameter 5 and connecing, after output auxiliary reclay 6 adhesive, start other controlled devices.

Embodiment two

On the basis of embodiment one, add AI analog input and AO analog output, AI analog input is divided into two-way by analog quantity isolation allotter and is respectively connected to Programmable Logic Controller 1 and Programmable Logic Controller 24, and AO analog output is divided into two-way analog quantity by analog quantity isolation allotter and accesses Programmable Logic Controller 1 and Programmable Logic Controller 24.

Claims

1. the Programmable Logic Controller structure of a hardware redundancy, including DI On-off signal (1), input intermediate relay (2), Programmable Logic Controller one (3), Programmable Logic Controller two (4), D0 output switch parameter (5) and output auxiliary reclay (6), it is characterized in that: described DI On-off signal (1) is respectively connected to Programmable Logic Controller one (3) and Programmable Logic Controller two (4) after being extended by input intermediate relay (2), the output of Programmable Logic Controller one (3) with Programmable Logic Controller two (4) is connected together and exports auxiliary reclay (6) and be connected by described D0 output switch parameter (5).