Industrial communication technology has become one of the most dynamic fields in modern automation. With the rapid development of new technologies, protocols, standards, and applications, it's constantly evolving and expanding. In my daily work and interactions with readers, I've noticed some common misconceptions that need to be clarified more thoroughly.
One widespread misunderstanding is that serial communication technology is outdated. However, this is not the case. Born in the 1960s, serial communication remains a fundamental standard in automation. Its main advantages include simple wiring, low cost, and longer cable lengths due to reduced crosstalk. Common interfaces like RS232, RS422, and RS485 are still widely used today. While these standards define only the electrical characteristics, they allow for the development of custom high-level protocols. For example, RS485 serves as the foundation for many industrial standards such as Profibus, Interbus, and Modbus. This flexibility ensures that serial communication continues to evolve and remain relevant in modern systems.
Another misconception is that fieldbus technology is losing ground due to the rise of Industrial Ethernet. In reality, traditional fieldbus technologies continue to grow at a strong pace. According to reports from leading analysts like IMS and ARC, the global fieldbus market saw over 10% annual growth between 2006 and 2010. Major fieldbus systems like Profibus, DeviceNet, CANopen, and CC-Link have maintained double-digit growth, showing their continued popularity. The reason for this resilience lies in the fact that most control systems today use hybrid network structures, where both fieldbus and Industrial Ethernet coexist and serve different purposes.
Lastly, there’s a growing interest in industrial wireless communication, which is often seen as a brand-new concept. While wireless technology itself is not new—long-range solutions like GSM and CDMA have been around for years—recent developments in short- and medium-range protocols such as 802.15.4 and Wi-Fi have sparked significant innovation. These technologies are now becoming key players in industrial applications, especially in areas where wired connections are impractical or costly. As a result, industrial wireless communication is rapidly gaining traction and shaping the future of automation.
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