CN201293938Y

CN201293938Y - Communication supervisor

Info

Publication number: CN201293938Y
Application number: CNU2008201064636U
Authority: CN
Inventors: 陈占群; 刘增辉; 刘坤霞
Original assignee: BAODING UNT ELECTRIC Co Ltd
Current assignee: BAODING UNT ELECTRIC Co Ltd
Priority date: 2008-11-06
Filing date: 2008-11-06
Publication date: 2009-08-19
Anticipated expiration: 2018-11-06

Abstract

Disclosed is a communication manager, which is used to resolve communication problems of an intelligent protective measurement and control unit on a fore layer on site and a DCS or a host computer in a power plant. The technical scheme includes that the communication manager is composed of two processors, serial port circuits and an Ethernet controller chip, wherein eight-way structures of the serial port circuits are identical, the two processors all utilize Rabbit 3000, four groups of receiving and transmitting terminals such as RX0 and TX0, RX1 and TX1, RX2 and TX2, and RX3 and TX3 of each processor are respectively connected with four intelligent measurement and control protective units through four serial port circuits, the first processor is further communicated with the host computer or the DCS through the Ethernet controller chip, and the other group of receiving and transmitting terminals RX4 and TX4 of the second processor is connected with the other group of transmitting and receiving terminals TX4 and RX4 of the first processor. The utility model can fast upload data or transmit commands to the measurement and control protective units, thereby largely increasing the control level of a power plant electric automation system.

Description

Communication manager

Technical field

The utility model relates to the communication management core cell that carries out exchanges data in the factory automation between the on-the-spot prefilter layer intelligent protection measurement and control unit and background monitoring machine, belongs to communication technique field.

Background technology

Continuous development along with large-scale industrial enterprise automatic control level, the intelligent terminal of production scene is more and more, the communication networking is very complicated, because production on-site environment is abominable, for guaranteeing that reliability adopts the low-speed serial communication more, therefore intelligent terminal more for a long time communication speed can not get ensureing information transmission even surpass minute level.Therefore, in factory automation system, how with the analog quantity of the intelligent apparatus of on-the-spot prefilter layer and digital data acquisition in supervisory system, and the forwarding that how to realize monitor command becomes key improving the factory automation system controlling level and problem demanding prompt solution.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of can be apace serving a machine monitoring on the data of on-the-spot prefilter layer intelligent protection measurement and control unit, and the order that the background monitoring machine is assigned is transmitted to the communication manager of site intelligent terminal protection measurement and control unit.

Problem described in the utility model realizes with following technical proposals:

A kind of communication manager, form by two processors, serial port circuit and ethernet controller chip U1 that eight line structures are identical, two processors all adopt Rabbit3000, four group of received of each processor are connected with four intelligent monitoring protected locations through four serial port circuits respectively with TX3 with TX2, RX3 with TX1, RX2 with TX0, RX1 with transmitting terminal RX0, and first processor CPU1 is also by ethernet controller chip U1 and host computer or DCS communication; Another group of received of the second processor CPU2 sends with another group of first processor CPU1 respectively with TX4 with transmitting terminal RX4 and is connected with RX4 with receiving end TX4.

Above-mentioned communication manager; the serial port circuit that described eight line structures are identical is formed by 485 communication chip U3; described 485 communication chip U3 adopt SN65LBC6N174; its A, B end is connected with the intelligent monitoring protected location through PORT COM, R, D hold respectively through a photoisolator receive accordingly with processor, transmitting terminal is connected.

Above-mentioned communication manager is set up an ethernet controller chip U2 who is connected with the second processor CPU2.

The utility model communicates by eight tunnel identical serial port circuit and various intelligent monitoring protected locations, gather various remote measurements, remote signalling data, and send various control operation orders, and carry out high speed data transfer by Ethernet special chip and host computer to the intelligent monitoring protected location; Adopting two processors is in order to expand serial communication interface, and Ethernet interface also is provided with two, and one of them Ethernet interface is used for and upper machine communication, and another is as the data maintenance of native system; Between processor and the intelligent monitoring protected location photoisolator being set can protect processor.The utility model can be apace sending host computer and DCS on the data of on-the-spot prefilter layer intelligent protection measurement and control unit, and the order that DCS or host computer are assigned is transmitted to the protection measurement and control unit, improved the controlling level of power plant electrical automated system greatly.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is an electrical schematic diagram of the present utility model;

Fig. 2 is a software flow pattern.

Each label is among the figure: A-1～A-8, serial port circuit; CPU1, CPU2, processor; U1, U2, ethernet controller chip; U3,485 communication chips; U4, U5, photoisolator; R1～R4, resistance.

Embodiment

The utility model is the communication management core cell of developing at communication management layer in the power plant electrical automated system (ECS); it is responsible for the data preparation of on-the-spot prefilter layer intelligent protection measurement and control unit is gathered on the one hand; (be Distributed Control System (DCS) with sending host computer and DCS on these information again; be DCS-Distributed Control System) finish the remote signalling remote measurement; receive the order that DCS or host computer assign on the other hand and be transmitted to on-the-spot prefilter layer intelligent protection measurement and control unit, finish remote control on-the-spot prefilter layer intelligent protection measurement and control unit.

Referring to Fig. 1; compare with traditional communication manager; hardware components of the present utility model has used Ethernet special chip RTL8019AS; realized high speed data transfer with host computer; eight tunnel identical serial port circuits, one tunnel (A-1) that only drawn; other several roads are identical therewith; R1 among the figure; R4 is a current-limiting resistance; R2; R3 is a pull-up resistor; this circuit is the standard serial communication port; all using photoelectricity to isolate protects; can realize that all are synchronous; asynchronous communication transmission (can support the HDLC/SDLC agreement when adopting the method for synchronization), communication baud rate can reach more than the 300K, is mainly used in various intelligent monitoring protected locations to communicate by letter; gather various remote measurements; the remote signalling data, and carry out various control operations.

Data processing is made up of identical two parts circuit with ethernet circuit, and this is in order to expand serial communication interface, and a part of circuit comprises 4 serial communication interfaces, and an Ethernet interface, two parts circuit be totally eight serial communication interfaces; Two Ethernet interfaces, one of them Ethernet interface U1 is used for and upper machine communication, and another Ethernet interface U2 links to each other with local computer, as the data maintenance of native system.Carry out exchanges data by serial ports between two identical circuit, the TXD4 of CPU1 links to each other with the RXD4 of CPU2, the RXD4 of CPU1 links to each other with the TXD4 of CPU2, this circuit mainly is to handle the data that receive from serial ports, data after handling are sent to host computer through network interface, and sending to serial ports after the data processing that receives from network interface, two processor chips rabbit3000 eight bit CPUs, for embedded system, Rabbit3000 even surpassed most 16 and some 32-bit microprocessors, but the efficient of 8 frameworks and flexibly do not lost again.The Rabbit3000 travelling speed is faster, the maximum 55.5MHz of dominant frequency, and the software of code compactness can directly be visited the data space of 1MB code.Be usually operated at 3.3V (can bear the 5VI/O input), Rabbit3000 also supports 6 serial ports (comprising infrared serial ports), 56 I/O mouths, quadrature decoder device, width modulation output, pulse capture and measurements.Also comprise the real-time clock of being with backup battery, seamless integrated memory and I/O interface, extremely low power consumption mode, the level Four interrupt priority allows response real-time event fast.Compact instruction set and high speed dominant frequency make Rabbit3000 that Digital Logic and I/O performance faster be arranged.

To upper machine communication RTL8019AS, RTL8019AS is the ethernet controller chip of being produced by Taiwan Realtek company.It is the integrated Ethernet chip of a height, can simply realize characteristics such as Plug and Play and compatible NE2000 power down.It has the power-down mode of three kinds of grades, under full-duplex mode, if being connected to one is that the switch or the hub of full duplex just can be realized receiving simultaneously and sending equally, though this characteristic can not be brought up to 20Mbps to transfer rate from 10Mbps, when carrying out Ethernet CSMA/CD agreement, can avoid more conflict to take place.

Principle of work:

The processor of communication manager (CPU1, CPU2) is by transmitting terminal (TX0～TX3) and receiving end (RX0～RX 3); gather and handle information such as various remote measurements from prefilter layer intelligent monitoring protected location, remote signalling through RS485 device U4, U5 (SN65LBC6N174) and photoelectric isolating device U4, U5 (TLP113), deposit in the real-time data base.And depositing in the transmitting terminal (TX1+ of data communication protocols as requested such as remote measurement in the real-time data base, remote signalling through Ethernet chip U1, U2 (RTL8019AS); TX1-) mail to the monitoring background computer; and can be through the receiving end (RX1+ of Ethernet chip U1, U2 (RTL8019AS); RX1-) the various operational orders that receive the background monitoring system computing machine are finished the operation of appointment to prefilter layer intelligent monitoring protected location, and the network interface U 2 of Fig. 1 is as the data maintenance of native system.

The utility model hardware components has adopted RTL8019AS dedicated ethernet chip; realized the high speed data transfer of communication manager and host computer; serial ports has partly adopted the photoelectricity isolation protective circuit; add embedded scm technical scheme completely; its small and exquisite dirigibility, reliability, antijamming capability, anti-virus ability, anti-adverse environment ability, the scheme that is based on PC is incomparable.

Claims

1, a kind of communication manager, it is characterized in that, it is made up of two processors, serial port circuit and ethernet controller chip (U1) that eight line structures are identical, two processors all adopt Rabbit3000, four group of received of each processor are connected with four intelligent monitoring protected locations through four serial port circuits respectively with TX3 with TX2, RX3 with TX1, RX2 with TX0, RX1 with transmitting terminal RX0, and first processor (CPU1) is also by ethernet controller chip (U1) and host computer or DCS communication; Another group of received of second processor (CPU2) sends with another group of first processor (CPU1) respectively with TX4 with transmitting terminal RX4 and is connected with RX4 with receiving end TX4.

2, according to the described communication manager of claim 1; it is characterized in that; the serial port circuit that described eight line structures are identical is formed by 485 communication chips (U3); described 485 communication chips (U3) adopt SN65LBC6N174; its A, B end is connected with the intelligent monitoring protected location through PORT COM, R, D hold respectively through a photoisolator receive accordingly with processor, transmitting terminal is connected.

3, according to claim 1 or 2 described communication managers, it is characterized in that, set up an ethernet controller chip (U2) that is connected with second processor (CPU2).