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Embedded field bus protocol interface device and implementation method

A protocol interface and fieldbus technology, applied in the field of Profibus-DP fieldbus intelligent slave interface module, can solve the problems of poor versatility, single function, inconvenient porting, etc. Effect

Inactive Publication Date: 2006-07-12
HEBEI UNIV OF TECH
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  • Description
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Problems solved by technology

In addition, their utility model patent "fieldbus intelligent analog data acquisition device" (application number: 200320123614) also provides an intelligent acquisition of 8 differential 4-20mA standard analog signals based on Profibus-DP fieldbus technology Devices, the functions of these two are relatively single, the versatility is poor, and it is not easy to transplant

Method used

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  • Embedded field bus protocol interface device and implementation method
  • Embedded field bus protocol interface device and implementation method
  • Embedded field bus protocol interface device and implementation method

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specific Embodiment approach

[0038] figure 1 It is a schematic diagram of the Profibus-DP field bus slave station interface device of the present invention: it mainly includes: Profibus-DP protocol processing chip (SPC3) (U1). Bus driver (U8), high-speed optical isolation (U7), DC / DC converter (U13), DB9 pin type (J2), 5-pin pluggable socket (J3) and 5-pin screw-fixed socket (J4) ;Microcontroller (U2), serial EEPROM (U14), power monitoring, watchdog chip (U10), latch (U5), decoder (U6), slave station address setting dial switch (U11) And working status indicator light (U12); 32K external data memory (U4), dual-port RAM (U3), 34-pin socket (J1).

[0039]Dual-port RAM parallel bus is used to realize high-speed repeated data exchange without handshake between two processors, which can improve system transmission speed and efficiency. Dual-port RAM has two sets of independent address, data, and read-write control lines, which can be connected to two different CPUs at the same time. As long as the same stora...

Embodiment 2

[0047] Figure 5 The second connection method to realize the Profibus field bus interface for the user product circuit template. In this connection mode, user product circuit template A and Profibus protocol conversion interface B realize data information exchange through TTL asynchronous serial port. This method is characterized by fewer connecting lines, simple structure, and slower speed. When the user product needs to communicate with the master station device of the field bus, it only needs to connect the CPU ⑦ of the user product circuit template A and the CPU ① on the Profibus protocol conversion interface B through two asynchronous transceiver data lines. When user product circuit template A sends data to the master device of the Profibus field bus, first CPU⑦ transmits the data to CPU① through the asynchronous serial port UART, and after receiving the data, CPU① performs Profibus-DP protocol conversion through SPC3③ and becomes fieldbus capable The identified data f...

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Abstract

The invention discloses a flush-type on-site bus protocol interface device and method, which connects instrument or equipment with PROFBUS to accomplish DP passive station communication function in the on-site PROFBUS. One end of interface mode exchanges data with 8-byte or 16-byte microprocessor as intelligent controller through two-port RAM or asynchronous serial port of TTL electrical level, which can be embedded in the circuit of intelligent instrument equipment; the other end displays standard Profibus-DP passive station interface, which communicates with other equipments through the switch-in bus of Profibus-DP passive station. The invention is fit for Profibus interface of high speed and moving control device, which brings significant social and economical benefit.

Description

technical field [0001] The invention relates to a Profibus-DP field bus intelligent slave station interface module, in particular to an embedded field bus protocol interface device and a realization method. The present invention can provide embedded Profibus-DP slave station interface for those products (such as intelligent instruments, controllers, drivers, etc.) Data communication of data to Profibus field bus. Background technique [0002] Fieldbus technology has become one of the hot spots in the field of automation technology today. It is a digital, two-way, serial, multi-point digital communication system between field devices installed in manufacturing and process areas and automatic control devices in the control room. It is widely used in manufacturing, process industry, and building automation systems. . The field bus control system implants a special microprocessor into the traditional control equipment, so that they each have digital computing and digital comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418G06F13/42H04L29/06
CPCY02P90/02
Inventor 孙鹤旭梁涛云利军雷兆明林涛董砚牛春刚刘光
Owner HEBEI UNIV OF TECH
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