Industrial communication technology has become one of the most dynamic fields in modern automation. With new technologies, protocols, standards, and applications constantly emerging, it's essential to clarify some common misconceptions that arise during daily work and interactions with readers.
One common misunderstanding is that serial communication technology is outdated. However, this is far from the truth. Developed 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. Popular interfaces like RS232, RS422, and RS485 are still widely used today. While these standards only define electrical characteristics, they allow for the development of higher-level protocols 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 declining due to the rise of Industrial Ethernet. In reality, fieldbus is still growing rapidly. According to reports from IMS and ARC, the global fieldbus market saw over 10% annual growth between 2006 and 2010. Technologies like Profibus, DeviceNet, CANopen, and CC-Link continue to show double-digit growth, showing their enduring popularity. The reason for this is that many control systems today use a hybrid network structure, where both Industrial Ethernet and fieldbus play important roles.
Lastly, industrial wireless communication is often seen as a brand-new concept. While long-range technologies 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 interest. These technologies are now at the forefront of industrial wireless communication, offering greater flexibility and mobility in automation environments. As more industries adopt wireless solutions, this area will continue to expand and evolve.
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