Device for switching from ETHERNET/IP (Internet Protocol) industrial Ethernet to Profibus-DP

Abstract

The invention discloses a device for switching from ETHERNET / IP (Internet Protocol) industrial Ethernet to Profibus-DP. A hardware part mainly comprises a main control chip with a high-speed UART (Universal Asynchronous Receiver / Transmitter) port, an Ethernet physical layer transceiver and a Profibus-DP physical layer receiving-transmitting chip. On the basis of an ARM (Advanced RISC Machine) and a pure software Profibus-DP protocol stack, Profibus-DP equipment is accessed into an ETHERNET / IP network by combining an ETHERNET / IP slave station with a Profibus-DP main station. According to the device, a Profibus-DP main station protocol is realized by adopting the software protocol stack and the physical layer transceiver, so that the hardware structure is simple, and low cost is realized; and an embedded real-time operating system is taken as an operating system platform, so that the efficiency of protocol conversion is increased greatly, and the requirement of high instantaneity of the Profibus-DP and the industrial Ethernet can be well met.

Description

technical field [0001] The invention belongs to the technical field of industrial automation, relates to a conversion device from ETHERNET / IP industrial Ethernet to Profibus-DP field bus, in particular to a conversion device based on ARM platform and pure software Profibus-DP protocol stack from ETHERNET / IP industrial Ethernet to Profibus-DP field bus conversion device. Background technique [0002] The industrial measurement and control system is mainly used to complete functions such as data collection, processing, and real-time monitoring of remote on-site points. The application of fieldbus technology, industrial Ethernet technology, etc. can realize the networking of the measurement and control system and improve the performance and openness of the system. Therefore, in the specific application of industrial control systems, there is often a need for protocol conversion from fieldbus to industrial Ethernet. . [0003] Among the various existing fieldbus standards, PRO...

AI Technical Summary

Problems solved by technology

[0006] Most of the existing Ethernet / IP and Profibus-DP conversion devices use the combination of Profibus-DP slave station and Ethernet / IP master station. This kind of device can only connect the Ethernet / IP slave station equipment to the Profibus-DP network. middle

However, the combination of the Ethernet / IP slave station and the Profibus-DP master station, although the Profibus-DP device can be connected to the Ethernet / IP network, but the Profibus master station protocol part uses a special Profibus-DP master station protocol chip or a special Profibus-DP communication module, there is no solution using pure soft Profibus-DP protocol stack

Using specialized chips or modules, although the development cycle is short, the cost is high and the hardware is relatively complex

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