The termination resistor for the CAN bus is generally 120 ohms. In fact, during design, it consists of two 60 ohm resistors connected in series. There are typically two nodes of 120Ω on the bus, which is a well-known fact for anyone with a basic understanding of the CAN bus. However, as someone who struggles … Read more
When selecting a DAQ device, have you considered these influencing factors? —— The choice of architecture and robustness will determine the applicable scenarios of the system, such as a controlled laboratory or unpredictable field conditions. —— The selected bus can determine not only the throughput and latency of the DAQ system but also the portability … Read more
1. Foundation Fieldbus (FF) This was established in September 1994 by the collaboration of American Fisher-Rousemount, Yokogawa, ABB, Siemens, Invensys, and over 80 other companies to create the ISP protocol, along with Honeywell and over 150 companies in Europe to create the WorldFIP protocol. This bus has been widely used in the field of process … Read more
In the development of industry, fieldbus plays a very important role, mainly applied in fields such as petroleum, chemical, electric power, medicine, metallurgy, manufacturing, transportation, national defense, aerospace, agriculture, and buildings. Today, I will introduce several types of fieldbus such as the Modbus communication protocol, PROFIBUS, FF, and CAN bus. Origin and Development of Modbus … Read more
Field of Application Smart Manufacturing Pain Points · Issue 1: Insufficient Bandwidth and Poor Anti-Interference of Traditional Fieldbus Technology With the intelligent development of the manufacturing industry and the exponential increase in the number of bus nodes, traditional fieldbus technologies (such as CAN, Profibus, etc.) can no longer meet the transmission requirements of massive data. … Read more
Bus control, as the name suggests, involves a single bus circuit connected to multiple devices. As shown in the figure below, all smoke exhaust outlets in the same smoke control zone can be controlled by a single bus control line. By pressing one button on the bus control panel, all smoke exhaust outlets can be … Read more
Introduction to In-Vehicle Networks As the complexity of electronic control systems increases, and the demand for communication capabilities among the electronic control units (ECUs) within vehicles grows, the use of point-to-point connections leads to an increase in wiring harnesses inside the vehicle. This creates significant challenges for reliability, safety, and quality in automotive design and … Read more
Profibus Bus Technology 1 What is Profibus Fieldbus? The fieldbus is a serial, digital, multipoint communication bus installed between field devices/instruments in the production process area and automatic control devices/systems in the control room. Of course, the production process includes both continuous and batch production. Profibus fieldbus is one of them. In simple terms, Profibus … Read more
Source: Electric Control Knowledge Transporter 5. MOST Bus MOST is a data bus technology specifically developed for in-vehicle use, serving multimedia applications. MOST stands for “Media Oriented Systems Transport”. Since BMW’s 7 Series first adopted MOST (Media Oriented Systems Transport) technology, the popularity of this technology has increased rapidly in recent years, enabling real-time transmission … Read more
In bus systems, both RS-485 and CAN-bus are commonly used buses, each with unique characteristics and application scenarios, widely applied. Today, let’s discuss their differences. 1. What is RS-485? RS-485 is a serial communication protocol that has been around since the mid-1980s, originally defined for industrial market applications. It uses differential signaling with negative logic, … Read more