Follow the IoT Planet to track IoT dynamics! “IoT Planet” aligns with global industry trends, focusing on the integration of IoT and industry, and sharing technologies and applications related to IoT. MQTT (Message Queuing Telemetry Transport) is a “lightweight” communication protocol based on the publish/subscribe model. This protocol is built on top of the TCP/IP … Read more
To pass the time, I will provide a detailed explanation of the previously written MQTT protocol code implementation; mainly focusing on the analysis and implementation of the MQTT network communication protocol, which specifically involves the splitting and processing of network data streams. Therefore, much of the content involves specific code functionalities. If you are interested … Read more
Contemporary philosopher J.E. Dinger once said, “Fate is not a matter of chance, but of choice.” For Chinese enterprises in the context of the high integration of global manufacturing and information technology, choosing a communication technology that is easy to implement, high-performance, quick to respond, and low-cost has become crucial in determining a company’s fate. … Read more
The fieldbus technology is a hot topic in the field of automation control, applied to real-time communication between multiple devices. In device connections, if a cable breaks at any point, it will affect communication between devices. Let’s take a look at how EtherCAT redundancy technology can remedy and lock communication in the event of a … Read more
Click the arrow and the “blue text” to follow us! In industrial control, communication plays a very important role. Any control is based on correct, reliable, and efficient communication. Let’s learn about Siemens’ Profibus DP communication. The Profibus DP communication of Siemens is mainly divided into the following three forms. 1. Communication between the master … Read more
Profibus DP Networking Key Points In industrial sites, one of the most troublesome issues for engineers is communication. Often, they feel that all their settings are correct, yet communication fails, leaving them confused. Below, we will specifically introduce how to set up a Profibus DP network for normal and stable operation. The setup of a … Read more
When mentioning Siemens’ communication, we must talk about PROFIBUS. Are you familiar with it? PROFIBUS is used in what ways? PROFIBUS supports master-slave mode as well as multi-master and multi-slave operating modes. In a multi-master environment, the control of the bus is determined by a token-passing method among the masters; once control is obtained, the … Read more
Steps for PROFIBUS DP Master-Slave Configuration: – Create a STEP 7 project – Insert the required SIMATIC S7-1200 station – Insert communication modules and other necessary modules in the station – Add the PROFIBUS DP network, assign DP addresses, define operation modes, and DP parameters DP Address Definition DP Master/Slave Mode Selection Maximum Address: Since … Read more
PROFIBUS Transmission Technology (Physical Layer) and DP Communication In the ISO/OSI reference model, the first layer defines the “physical” methods of data transmission. This includes encoding types and the transmission standards used (e.g., RS 485). PROFIBUS provides various transmission technologies for the first layer: RS 485, RS 485-IS, MBP, and fiber optic transmission technology. Traditional … Read more
PROFIBUS Connectors and Termination Resistors The connectors are used to connect the PROFIBUS cable to the PROFIBUS stations (as shown in Figure 1). Figure 1 Use of PROFIBUS Connectors On the PROFIBUS connector, there is an incoming port (In) and an outgoing port (Out), which connect to the previous and next stations respectively. 1. Each … Read more