Double on-site bus interface converter

Abstract

The invention relates to a multi-field bus interface converter, with the technical scheme that: one end of a CAN bus transceiver (1) is connected with the can bus network, and other end is connected with a CAN controller (10) through a first optical coupling isolation circuit (2); one end of a SPC3 protocol controller (4) is connected with a SoC microcontroller (9), and the other end is connected with an RS deliver (6) through a second optical coupling isolation circuit (5); an RS 485 driver (6) is connected with the Profibus-DP bus network; a serial field device or an instrument (13) is connected with the SoC microcontroller (9) through a serial communucation interface module (11); a bus selecting switch module (8) is connected with a Soc microcontroller (1). The protocol converting program between the serial port and the CAN and Profibus-DP bus interface is stored in the SoC microcontroller (9). The invention is characterized by strong flexibility and low hardware complexity and the like, thereby realizing the monitoring management and resource sharing on the same serial device by the two field bus networks, reach interconnection of heterogeneous network.

Description

technical field [0001] The invention belongs to the technical field of field bus. In particular, it relates to a double field bus interface converter. Background technique [0002] The huge demand of actual production has promoted the rapid development of field bus technology and products, and the application of various field communication networks is becoming more and more popular, especially CAN, Profibus-DP and other networks are developing the fastest in our country. However, the equipment and instruments with these fieldbus communication capabilities provided on the market are mainly imported equipment, and the price is high. Therefore, the development of fieldbus interface technology and products is a problem that technicians are more concerned about at present. For example, Beijing Dingshi Innovation Technology Co., Ltd. has developed RS-232 / 485-to-Profibus-DP and RS-232 / 485-to-CAN bus bridges; Sweden's HMS company has developed AnyBus-X series serial port gateways ...

AI Technical Summary

Problems solved by technology

[0003] Although some progress has been made in these technical researches and product applications, they are either aimed at the conversion from a serial port to a single fieldbus or between two types of fieldbuses. Bus conversion, the interface function is single, the flexibility is poor, it cannot meet the needs of the actual industrial system for multiple field buses, and the hardware complexity is high and the volume is large

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