Modbus TCP is a traditional and widely used communication protocol that is supported by numerous intelligent devices. Siemens’ S7-200SMART, 1200, and 1500 series all provide free support (while the 300 and 400 series incur high fees), and they are presented in the form of a standard library, making operation quite convenient. Next, I will briefly … Read more
Today, I will share with you some common knowledge points about TCP network, which you will often encounter in daily work or interviews. Considering the length of the content, I suggest you bookmark it and digest it slowly. If it helps, please share it with your friends; “It’s better to enjoy together than to enjoy … Read more
01 Terminology Interpretation 1 word = 2 bytes; 1 byte = 8 bits. Checksum: A checksum is derived from the preceding data through a certain algorithm to verify the correctness of the data set. When inputting codes as data into a computer or other devices, input errors can easily occur. To reduce such input errors, … Read more
Light Topic CC teacher shares the cornerstone coding + graphics technology explanation for live development. Tonight is the last day to sign in, don’t waste your efforts! If you complete the sign-in tonight, you can receive the full set of iOS skill expansion videos after class. Tonight at 8:30, a detailed explanation of the above … Read more
WeChat Search Technical Training The M580 is Schneider’s medium to large PLC, powerful in functionality, while the S7 200 SMART is Siemens’ small PLC, widely used in industrial settings where communication between two PLCs is often required. The M580 supports both MODBUS TCP and Ethernet/IP industrial Ethernet protocols, and the S7 200 SMART can also … Read more
Abstract: As customers have higher requirements for the environment of filling equipment, a large number of purification fans (FFU) have been applied to filling equipment. Economic cost, simple and quick installation, operation, and maintenance have become the key factors in the control scheme. To address this issue, we propose using Siemens PLC with MODBUS TCP … Read more
As one of the types of industrial control systems, Distributed Control Systems (DCS) are widely used to control critical infrastructure, distributed in the oil, chemical, metallurgy, cement, and water systems, serving as the “brain” for process operators. Their importance is self-evident. In the mid-1970s, decentralized control systems based on microprocessors emerged. After more than 30 … Read more
TCP HTTP UDP: All are communication protocols, which are the rules followed during communication. Only when both parties “speak” according to these rules can they understand or serve each other. Relationship Between TCP, HTTP, and UDP: TCP/IP is a suite of protocols, divided into four layers: network interface layer, network layer, transport layer, and application … Read more
Author: Shulan Technology Source: www.jianshu.com/p/e47a766e03da Introduction: As a developer, we often hear terms like HTTP protocol, TCP/IP protocol, UDP protocol, Socket, Socket long connection, Socket connection pool, etc. However, not everyone can clearly understand their relationships, differences, and principles. This article will start from the basics of network protocols and explain the relationship between them … Read more
1. HTTP (Hypertext Transfer Protocol) Hypertext Transfer Protocol (HTTP) is a simple request-response protocol that typically runs on top of TCP. It specifies what kind of messages a client can send to a server and what kind of responses it can expect. The headers of request and response messages are given in ASCII; while the … Read more