KẾT NỐI MẠNG PLC BẰNG GIAO THỨC MODBUS TCP/IP VỚI S71200 SERVER VÀ CÁC S71200 CLIENT

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Tác giả: Nguyễn Thành Đoàn, Nguyễn Phương Trà

Ngôn ngữ: Vie

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Thông tin xuất bản: Tạp chí Khoa học - Đại học Thủ Dầu Một 2020

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ID: 407089

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Với sự phát triển mạnh mẽ của việc điều khiển, truyền thông các thiết bị tự động qua mạng thì nhu cầu kết nối các thiết bị với nhau qua giao thức Moddbus TCP/IP rất cần thiết trong xí nghiệp, nhà máy trong các khu chế xuất và công nghiệp trên địa bàn tỉnh Bình Dương. Bài báo này trình bày phương pháp kết nối mạng giữa các PLC với nhau. S71200 làm Server và các S71200 làm các Client. Các PLC này trao đổi dữ liệu với nhau thông qua mạng truyền thông Modbus TCP/IP. Việc kết nối mạng giữa các PLC S71200 được thực hiện bằng cách sử dụng giao thức truyền Modbus TCP/IP . Cách thức truyền khai báo theo cấu trúc Modbus protocol gồm có địa chỉ, giao thực tuyền, số lượng các khối dữ liệu truyền và nhận thông qua cáp mạng RJ45. Thực hiện truyền khối dữ liệu đọc và ghi giữa 2 PLC S71200 với chương trình phần mềm Tia Portal V14, kết nối máy tính để giám sát thông số truyền. Số lượng đọc từ PLC S71200 Server là 10 byte (5 word đọc) và ghi từ PLC S71200 Client là 10 byte (5 word ghi). Nghiên cứu này cung cấp giải pháp tối ưu trong truyền thông mạng công nghiệp trong thực tế và áp dụng cho đào tạo với hiệu quả cao. Tốc độ truyền nhanh và chi phí thấp theo chuẩn Modbus TCP/IP. Có thể được ứng dụng truyền dữ liệu mạng nội bộ các thiết bị điều khiển trong các xí nghiệp, công nghiệp., Tóm tắt tiếng anh, With the strong development of automatic control and communication of equipment over the network, the need to connect devices together via Modbus TCP/IP protocol is essential in enterprises and factories in export processing and industrial zones in Binh Duong province. This paper presents the method of network connection between PLCs together. S71200 is the server and the S71200 is the client. These PLCs exchange data with each other via Modbus TCP/IP communication network. The network connection between the S71200 PLCs is made to use the Modbus TCP/IP communication protocol. The methods of transmission according to the Modbus protocol structure include the address, the interface, the number of blocks of data transmitted and received via the RJ45 network cable. Transmission of reading and writing data blocks between 2 S7 S7 1200s with Tia Portal V14 software program, connecting computers to monitor transmission parameters. The number of reading from PLC S71200 Server is 10 bytes (5 word read) and writing from PLC S71200 Client is 10 bytes (5 word write). This study provides an optimal solution in real network industrial communications and applies to training with high efficiency. Fast transmission speed and low cost according to Modbus TCP/IP standard. Can be applied intranet data transmission device control in enterprises, industry.

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