Gateway for conversion between Modbus RTU/ASCII (remote terminal unit/American standard code for information interchange) communication protocol and Modbus TCP (transmission control protocol) communication protocol and implementation method for gateway
A communication protocol conversion and communication protocol technology, applied in the field of industrial automation control, can solve the problem of high cost of gateways, and achieve the effect of low development risk and low development cost
Inactive Publication Date: 2015-04-08
PINGDINGSHAN ZHONGXUAN AUTOMATIC CONTROL SYST
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Problems solved by technology
The conversion between Modbus RTU / ASCII and Modbus TCP communication protocols needs to be realized through a gateway, and the current gateway costs a lot
Method used
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[0013] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0014] As shown in the figure, a gateway for the conversion of Modbus RTU / ASCII and Modbus TCP communication protocols, including an OpenWrt compatible router main board and an RS-485 transceiver controller connected through an RS-485 interface circuit, the OpenWrt compatible router main board is equipped with a Modbus RTU / ASCII communication protocol controller, Modbus TCP communication protocol controller and interface, the interface includes RJ45 Ethernet interface, WiFi interface and 3G network interface connected through USB interface. The RS-485 transceiver controller includes a power supply part that supplies power to the RS-485 transceiver and an RS-485 transceiver part. The RS-485 transceiver controller is internally connected to the UART interface of the OpenWrt compatible router motherboard, and externally connected to the RS-485 bus.
[0015] The RS-485 t...
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The invention relates to a gateway for conversion between a Modbus RTU / ASCII (remote terminal unit / American standard code for information interchange) communication protocol and a Modbus TCP (transmission control protocol) communication protocol and an implementation method for the gateway. The gateway comprises an OpenWrt compatible router mainboard and an RS-485 (recommended standard-485) transceiving controller which are connected through an RS-485 interface circuit; the OpenWrt compatible router mainboard is provided with a Modbus RTU / ASCII communication protocol controller, a Modbus TCP communication protocol controller and interfaces; the RS-485 transceiving controller comprises a power supply part and an RS-485 transceiving part, wherein the power supply part is used for supplying power for an RS-485 transceiver; the interior of the RS-485 transceiving controller is connected with an UART (universal asynchronous receiver / transmitter) interface of the OpenWrt compatible router mainboard, and exterior of the RS-485 transceiving controller is connected with an RS-485 bus. According to the gateway and the implementation method for the gateway disclosed by the invention, through the Modbus RTU / ASCII communication protocol controller, the Modbus TCP communication protocol controller, the interfaces and the RS-485 transceiving controller on the OpenWrt compatible router mainboard, the conversion between the Modbus RTU / ASCII communication protocol and the Modbus TCP communication protocol is realized, and moreover, the cost is reduced through the power supply of the power supply part in the RS-485 transceiving controller.
Description
technical field [0001] The invention relates to a gateway for converting Modbus RTU / ASCII and Modbus TCP communication protocols and a realization method thereof, belonging to the field of industrial automation control. Background technique [0002] The Modbus RTU / ASCII protocol is a serial communication protocol widely used in industrial control sites. With the popularization of Ethernet applications, the demand for converting serial communication to Ethernet communication is gradually increasing. The Modbus TCP communication protocol is a Modbus communication protocol that runs on the TCP / IP network, and mostly runs on the Ethernet. The conversion between Modbus RTU / ASCII and Modbus TCP communication protocols needs to be realized through a gateway, and the current gateway costs a lot. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention provides a gateway for the conversion of Modbus RTU / ASCII and Modbus TCP...
Claims
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Login to View More IPC IPC(8): H04L29/06H04L12/66
CPCH04L12/66H04L67/12H04L69/08Y02D30/00
Inventor 周国宾陈拥军张剑峰高宇
Owner PINGDINGSHAN ZHONGXUAN AUTOMATIC CONTROL SYST