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
🎈✨Introduction: 😎Dear friends, as network engineers, do you often feel confused by various protocols? Today, I am here to provide you with a super detailed list of 35 commonly used protocols for network engineers, making it easy for you to master them and no longer feel lost! 👏 Body: 1. – TCP (Transmission Control Protocol): … Read more
Background Keep alive is part of the variable header in the CONNECT message. We have mentioned that the Broker needs to know whether the Client has disconnected abnormally to send the last will message. In fact, the Client also needs to quickly detect if it has lost the connection to the Broker in order to … Read more
From: Juejin, Author: Ruheng Link: https://juejin.im/post/6844903490595061767 1. TCP/IP Model The TCP/IP protocol model (Transmission Control Protocol/Internet Protocol) includes a series of network protocols that form the foundation of the Internet and is the core protocol of the Internet. The reference model based on TCP/IP divides the protocols into four layers: the Link Layer, Network Layer, … Read more
I remember the first time I learned about the global Internet, I wondered what it was really like. When people told me there was a computer network covering almost all of the United States and many places around the world, the first image that came to my mind was a thick cable running along telephone … Read more