CN101477348A

CN101477348A - Digital quantity input card based on PLCcore-CF54 module

Info

Publication number: CN101477348A
Application number: CNA2009100102127A
Authority: CN
Inventors: 李砾工; 吴涛; 王忠福; 陈华
Original assignee: CNR Dalian Electric Traction R& D Center Co Ltd
Current assignee: CRRC Dalian R&D Co Ltd
Priority date: 2009-01-19
Filing date: 2009-01-19
Publication date: 2009-07-08

Abstract

The invention discloses a digital quantity input board based on a PLCcore-CF54 module, which is characterized by comprising a serial port debugging and configuration unit which consists of an RS232, an RS232 serial port bus interface, an industrial Ethernet physical interface, a CAN bus physical interface, a digital quantity input channel and a PLCcore-CF54 module driving buffer interface, wherein the serial port configuration unit which consists of the RS232, the RS232 serial port bus interface, the industrial Ethernet physical interface, the CAN bus physical interface and the digital quantity input channel are all realized by the PLCcore-CF54 module driving buffer interface. The gateway design is based on the PLCcore-CF54 module; the digital quantity input board is provided with various external communication interfaces; and the module has rich resources and is suitable to be applied to a locomotive network system with complex field application conditions and severe operating environment.

Description

Digital quantity input integrated circuit board based on the PLCcore-CF54 module

Technical field

The present invention relates to be used for transformation of data to be processed become the input media of the form that computing machine can handle, relate in particular to a kind of digital quantity input integrated circuit board based on the PLCcore-CF54 module.Can be used as the slave unit on the network control platform of following the CANopen agreement.This integrated circuit board meets railroad industry standard TB/T3021-2001 " rolling stock's electronic installation ".

Background technology

Controller local area network CAN (Controller Area Network) be early 1980s Germany Bosch company for solving a kind of serial communication protocol that the exchange of the real time data between numerous control modules, the testing tool is developed in the Hyundai Motor, be one of most widely used fieldbus in the world.CAN bus characteristics are to adopt the two-wire differential signal, abolish traditional station address coding, adopt the work of many master modes, short frame structure and non-destructive bus arbitration, have guaranteed high reliability, real-time and the dirigibility of data communication.The CAN bus has higher performance, and simple in structure; The CAN controller has obtained integrated in a large amount of microprocessors, becomes a kind of the easiest development platform.

The CANopen agreement is based on a kind of upper-layer protocol of CAN bus, use comparatively extensive in Europe, be suitable for fields such as elevator is electric, cross-country vehicle, navigation electronics, medical electrical equipment, engineering machinery, railway locomotive, a lot of European urban rail cars, light rail and subway all adopt the CANopen agreement at present.

Summary of the invention

The objective of the invention is to design a kind of digital quantity input integrated circuit board based on the PLCcore-CF54 module, this integrated circuit board has CAN bus interface, RS232 interface and Ethernet interface, be slave unit, be fit to various types of railway locomotive digital quantity inputs and gather with CANopen application layer protocol.

Technical solution of the present invention is achieved in that

A kind of digital quantity input integrated circuit board based on the PLCcore-CF54 module, it is characterized in that comprising the serial ports dispensing unit of forming by RS232, the RS232 serial bus interface, the Industrial Ethernet physical interface, CAN bus physical interface, digital quantity input channel and PLCcore-CF54 module drive buffer interface, wherein said configuration serial ports unit and serial bus interface are made of MAX3243, monolithic is realized two serial port functions, serial ports sends TxD0, TxD1 is connected to 13 and 14 pin T1IN of chip, T2IN, serial ports receives RxD0, RxD1 is connected to 18 and 19 pin R1OUT of chip, R2OUT; Described CAN bus physical interface is made of HCPL0661 and PCA82C250, the CAN bus sends signal CAN_Tx0 and imports 3 pin through 74ABT04D buffering driving optocoupler, output signal is connected to physical chip 1 pin TXD through resistance, finally become differential signal and drive the CANH of pin 7 and the CANL of pin 6, received signal on the bus is transformed into digital signal through physical chip and drives 4 pin RXD, the RXD input connects optocoupler 1 pin, and buffer chip 74ABT04D is delivered in the output of 7 pin; Described digital quantity input channel adopts the photoelectricity isolation design, deliver to the input pin of optocoupler after digital quantity input signal IN presses through TVS protection, electric resistance partial pressure and the stabilivolt pincers of front end, draw with Filtering Processing on the signal process after the electrical isolation and deliver to single-chip microcomputer digital data acquisition pin; Described serial ports dispensing unit, RS232 serial bus interface, Industrial Ethernet physical interface, CAN bus physical interface, digital quantity input channel all realize by PLCcore-CF54 module drive buffer interface.Serial ports dispensing unit and RS232 serial bus interface that described RS232 forms are made of MAX3243, serial ports dispensing unit configuration ethernet IP address, gateway and subnet mask that RS232 wherein forms, RS232 serial bus interface are wherein finished normal serial communication and debugging configuration application parameter.

Described CAN bus physical interface is made of HCPL0661 and PCA82C250, PCA82C250 is a CAN bus driver transceiver, HCPL0661 realizes CAN bus and gateway plate electrical isolation, and and peripheral resistance, inductance, TVS device improve the antijamming capability of CAN bus together.

Described digital quantity input is made of front end dividing potential drop protecting network, light-coupled isolation and front end redundant network.The dividing potential drop protecting network reduces and the input of protection high voltage, and light-coupled isolation realizes extraneous digital quantity input and integrated circuit board electrical isolation, and the front end redundant network is realized the both-end input, improves the reliability of digital quantity sampling.

Description of drawings

The present invention has 7 width of cloth accompanying drawings, wherein:

Fig. 1 is a structured flowchart of the present invention.

Fig. 2 is RS232 physical interface circuit figure.

Fig. 3 is ethernet interface circuit figure.

Fig. 4 is CAN bus physical interface circuit figure.

Fig. 5 is digital quantity input circuit figure.

Fig. 6 is the electric definition of PLCcore-CF54 physical interface.

Fig. 7 is that the PLCcore-CF54 egress buffer drives design circuit figure.

Embodiment

As Fig. 1～shown in Figure 8.A kind of digital quantity input integrated circuit board based on the PLCcore-CF54 module is characterized in that comprising serial ports dispensing unit, RS232 serial bus interface, Industrial Ethernet physical interface, CAN bus physical interface, digital quantity input and the PLCcore-CF54 module drive buffer interface be made up of RS232.As an embodiment, this integrated circuit board comprises two-way RS232 serial communication interface, ethernet interface, one road CAN bus communication interface and 16 road digital quantity input channels.One road RS232 serial ports configuration ethernet IP address, gateway and subnet mask, one road RS232 serial ports is used for h.323-configured gateway application layer parameter.Ethernet is used for down load application layer program and ethernet communication.This integrated circuit board is fit to digital quantity inputs such as electric locomotive, light rail to be gathered, and integrated circuit board has the CAN bus interface, is the standard I/O slave unit that meets CANopen application layer protocol DS401.Based on the digital quantity input channel that the digital quantity tablet jig of PLCcore-CF54 module has 16 passage photoelectricity to isolate, every passage adopts the method for the redundant input design of both-end, improves the reliability of digital quantity sampling and has effectively suppressed electromagnetic interference (EMI).The PLCcore-CF54 module can be carried out complex calculations and logical process function, satisfies the application demand of high-end CANopen slave unit.

Claims

1, a kind of digital quantity input integrated circuit board based on the PLCcore-CF54 module, it is characterized in that comprising the serial ports dispensing unit of forming by RS232, the RS232 serial bus interface, the Industrial Ethernet physical interface, CAN bus physical interface, digital quantity input channel and PLCcore-CF54 module drive buffer interface, wherein said configuration serial ports unit and serial bus interface are made of MAX3243, monolithic is realized two serial port functions, serial ports sends TxD0, TxD1 is connected to 13 and 14 pin T1IN of chip, T2IN, serial ports receives RxD0, RxD1 is connected to 18 and 19 pin R1OUT of chip, R2OUT; Described CAN bus physical interface is made of HCPL0661 and PCA82C250, the CAN bus sends signal CAN_Tx0 and imports 3 pin through 74ABT04D buffering driving optocoupler, output signal is connected to physical chip 1 pin TXD through resistance, finally become differential signal and drive the CANH of pin 7 and the CANL of pin 6, received signal on the bus is transformed into digital signal through physical chip and drives 4 pin RXD, the RXD input connects optocoupler 1 pin, and buffer chip 74ABT04D is delivered in the output of 7 pin; Described digital quantity input channel adopts the photoelectricity isolation design, deliver to the input pin of optocoupler after digital quantity input signal IN presses through TVS protection, electric resistance partial pressure and the stabilivolt pincers of front end, draw with Filtering Processing on the signal process after the electrical isolation and deliver to single-chip microcomputer digital data acquisition pin; Described serial ports dispensing unit, RS232 serial bus interface, Industrial Ethernet physical interface, CAN bus physical interface, digital quantity input channel all realize by PLCcore-CF54 module drive buffer interface.

2, the digital quantity input integrated circuit board based on the PLCcore-CF54 module according to claim 1, it is characterized in that serial ports dispensing unit and RS232 serial bus interface that described RS232 forms are made of MAX3243, serial ports dispensing unit configuration ethernet IP address, gateway and subnet mask that RS232 wherein forms; RS232 serial bus interface is wherein then finished normal serial communication and debugging configuration application parameter.

3, the digital quantity input integrated circuit board based on the PLCcore-CF54 module according to claim 1 is characterized in that described CAN bus physical interface is made of HCPL0661 and PCA82C250, and PCA82C250 is a CAN bus driver transceiver; HCPL0661 then is used to realize the electrical isolation of CAN bus and gateway plate, and and peripheral resistance, inductance, TVS improve the antijamming capability of CAN bus together.

4, the digital quantity input integrated circuit board based on the PLCcore-CF54 module according to claim 1; it is characterized in that the digital quantity input channel is made of front end dividing potential drop protecting network, light-coupled isolation and front end redundant network; every road digital quantity input channel has all adopted Redundancy Design, is used to improve the reliability of digital quantity sampling.