CN107643989A

CN107643989A - One kind is based on pci bus agreement dual fiber ring road redundancy structure Communication Card

Info

Publication number: CN107643989A
Application number: CN201610582811.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Beijing Zhongkexin Electronic Equipment Co Ltd
Current assignee: Beijing Zhongkexin Electronic Equipment Co Ltd
Priority date: 2016-07-22
Filing date: 2016-07-22
Publication date: 2018-01-30
Anticipated expiration: 2036-07-22
Also published as: CN107643989B

Abstract

What the present invention was told about is that one kind is based on pci bus agreement dual fiber ring road redundancy structure Communication Card.The invention is made up of pci bus interface (1), double optical fiber interfaces (2), Control card (3).The invention is directly inserted in the PCI slot of industrial control computer, industrial control computer to this Communication Card by carrying out write operation, send control information to communication card, control data transmitted by pci bus is converted into by fiber-optic signal by FPGA Control cards and sends each the next machine controller to, lower computer control system is set reasonably to be controlled, simultaneously, each slave computer can also by fiber optic loop by numeral and emulation mode information transmission to Communication Card, industrial control computer is read back the state of each slave computer by read operation.This method is described in detail specification, and provides specific embodiment.

Description

One kind is based on pci bus agreement dual fiber ring road redundancy structure Communication Card

Technical field

The present invention is that one kind is based on pci bus agreement dual fiber ring road redundancy structure Communication Card, and the board can be applied In any industrial control field, pci bus interface has higher data transmission bauds, and dual fiber ring road Redundancy Design can make Control signal is interference-free in the environment such as electric field, magnetic field and realizes accurate control, passes through pci bus interface and optical fiber interface Realize industrial control computer to the status information capture of slave computer Control card and the purpose of control.

Background technology

Communication Card generally use isa bus agreement single fiber loop structure, isa bus used in industrial circle at present There are 8 and 16 both of which, and pci bus is the synchronous multiplexing bus of 32 and 64 both of which, you can connect with saving The number of pins of plug-in unit, burst transfers of data can be realized again, make transmission data highly efficient, when pci bus interface, system meeting Automatically resource needed for board is allocated, and the corresponding driver of Automatic-searching, manual configuration is not required to, though single fiber loop So there is preferable anti-interference, but when optical fiber cable or some optical fiber interface go wrong, whole optical fiber control loop without Method works, and system is not run, and dual fiber ring road Redundancy Design can be when some optical fiber loop breaks down, automatically The communication of another optical fiber loop is switched to, does not influence system work, and the optical fiber loop of failure can be carried out simultaneously Maintenance.

The Communication Card will be described in detail herein.

The content of the invention

The present invention is achieved through the following technical solutions：

1.PCI EBIs, operation is written and read to communication card by industrial control computer, realizes Industry Control meter Data between calculation machine and communication card communicate.

2. pair optical fiber interface, the transmission and reception of data are carried out by dual fiber ring road redundancy structure interface, communication is realized Data transfer between board and slave computer Control card.

3. Control card, Control card master chip is FPGA, the status signal that optical fiber loop is collected and feedback letter Number storage enters to the data among memory, read by the read-write operation of industrial control computer among memory row write of going forward side by side Data, FPGA are to use Verilog language, are the parallel method of operation, make optical fiber loop collection model and industrial control computer Read-write is independent of each other.

Brief description of the drawings

Fig. 1 is based on pci bus interface control system flow chart

Fig. 2 communication card schematic diagrames

Embodiment

The present invention is achieved through the following technical solutions：

1. module (1) is pci bus interface.The address bus and data/address bus of pci bus are time-sharing multiplexs, in data During transmission, by an equipment as main equipment, another equipment is slave unit, the generation of all sequential in bus and is set all There is main equipment control, it is necessary to an arbitration organ determines that who takes the control of bus, it is main when pci bus is operated Equipment need to first obtain the license of moderator, and Slave addresses are then placed in AD buses, while place command signal, and explanation connects The transport-type to get off, equipment all needs to decode this address in all pci bus, and selected equipment will state that oneself is selected In, data then can be just transmitted, bus control right is discharged after data have been passed.Pci bus has high speed, can matched somebody with somebody automatically Put, reliability height, favorable expandability, multiplexing, high data transmission efficiency the advantages that.

2. module (2) is dual fiber ring road redundancy structure.Dual fiber ring road redundancy structure is Communication Card and slave computer control The data communication mode of making sheet card, generally in industrial control field, the distance of communication card and slave computer Control card is longer, and And in particular application, there can be the presence in substantial amounts of electric field and magnetic field, if using analog quantity or the electric signal of digital quantity Transmission, will certainly make transmission signal be interfered, and slave computer Control card control accuracy is reduced or uncontrollable, and fiber optic loop Road is optical signal transmission, can be very good to avoid disturbing.Dual fiber ring road redundancy structure uses two-way optical fiber loop, such as using single Optical fiber loop, when any optical fiber cable in loop or fibre-optical splice damage, whole loop is uncontrollable, and dual fiber ring road is superfluous Remaining structure solves this problem well.

3. module (3) is Control card.Control card major function is to realize the data between pci interface and optical fiber interface Transmission, a dual-ported memory is provided generally in Control card, when host computer, which is sent, orders, industrial control computer needs Write operation is carried out to dual-ported memory, all control datas are written among dual-ported memory, Control card passes through The data for reading corresponding address are sent to corresponding slave computer Control card by optical fiber loop according to certain data format, when When host computer needs to gather slave computer status information, by optical fiber loop by the status signal and feedback letter of slave computer Control card Number it is transferred to according to certain data format in Control card, Control card dumps to signal among dual-ported memory, then Read operation is carried out to dual-ported memory by industrial control computer, by each Control card signal read-back of slave computer, meanwhile, control Need one ROM of configuration to be used to preserve data when powering off in making sheet card, when Communication Card is de-energized, can be read by ROM Take the status information and feedback information of each slave computer Control card before powering off.

It is described above that present disclosure is elaborated.For persons skilled in the art, do not carrying on the back To any obvious change that it is done on the premise of from the present invention, the infringement to patent of the present invention is all formed, will be undertaken Corresponding legal liabilities.

Claims

1. the pci bus agreement dual fiber ring road redundancy structure Communication Card, by pci bus interface (1), double optical fiber interfaces (2), Control card (3) forms.Module (1) is pci bus interface, and pci bus is a kind of parallel bus standard, its working frequency (33MHz) has very big lifting compared with isa bus working frequency (8MHz), can be by the read-write operation of industrial control computer with leading to Interrogate reading and write-in that board carries out data；Module (2) is double optical fiber interfaces, is mainly used in the control of slave computer, using double light Fine loop redundancy structure, when one of optical fiber loop goes wrong, Control card automatically switches to another way optical fiber loop pair The status information of each slave computer is acquired and controlled；Module (3) is Control card, and Control card is using FPGA as master control Chip, FPGA are programmed using Verilog language, also as hardware description language, using the parallel method of operation, have speed Hurry up, can programming, the features such as real-time is good repeatedly, mainly fiber-optic signal is acquired and sent with Control card, to pci bus The transmission of progress data sends fiber-optic signal collection and transmission and pci bus data with receiving, gathering each communicating status information Avoid conflicting with reception.