Rapid discriminating multiport control method based on PROFIBUS packet

A control method and multi-port technology, applied in digital transmission systems, electrical components, error prevention, etc., can solve problems such as slow speed, delay in parsing messages, complex hardware design, etc., and achieve fast speed and low hardware overhead Effect
CN101374115AInactive Publication Date: 2009-02-25BEIJING D&S FIELDBUS TECH
0 Cites 11 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING D&S FIELDBUS TECH
Publication Date
2009-02-25
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a multi-port control method based on the rapid PROFIBUS message identification. The method comprises the following steps: (1) electrification setting; (2) detecting the port signal level by a detecting and isolating circuit detection; (3) detecting the port PROFIBUS signal level by the detecting and isolating circuit, wherein when the signal level is converted from a release state to a transmission state, whether the port receives a message starting signal can be determined; (4) allowing the other ports to be in a transmission state by a multi-path receiving / transmitting control logic circuit, converting the received message into a transmission message signal and outputting the signal to the other ports via a driving and isolating circuit; (5) transmitting a second wave trigger signal when the conversion of the signal level from the transmission state to the release state is detected by the detecting and isolating circuit detection; (6) determining the completion of the message transmission by determining the last time of the second wave trigger signal with the multi-path receiving / transmitting control logic circuit, and closing the other ports; and (7) returning to the step (2). By adopting the method, the message resolution and the baud rate test can be obviated, therefore, the method is a rapid and baud rate-self-adaptive message data flow judgment method.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for quickly identifying PROFIBUS message data flow without parsing PROFIBUS message and self-adaptive baud rate, and a PROFIBUS multi-port data flow control technology based on the method. This method can be applied to the development of multi-port PROFIBUS network equipment, such as PROFIBUS repeater, hub, optical fiber conversion interface and multi-port PROFIBUS gateway, bridge product; it can also be applied to other repeaters and hubs based on RS-485 network Product development of multi-port network equipment. Background technique

[0002] In the PROFIBUS network based on RS-485, repeaters are needed to increase network segments to increase PROFIBUS stations and extend PROFIBUS transmission distance. Using PROFIBUS multi-port devices, such as PROFIBUS hubs, can change the PROFIBUS bus-type network topology and realize tree-type or hybrid network structure. Whether it is a repeater, a hub, or other multi-port net...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More