modbus is still relevant?
Of course Modbus is very stable protocol and is still suitable where refresh rate need not be very fast .Especially its suitable to connect low speed third party devices to the exisiting networks.
example update energy used by energy meter.
or updating set value if a temperature controller. To find out where other protocols are good please visit www.Plcscadaforall.com
Modbus's Relevance to todays times
it, despite being developed during an era when communication relied heavily on wired connections, continues to be relevant in the age of optical fiber. Here are some reasons why Modbus remains widely used:
1. Compatibility: it has been a well-established and widely adopted protocol for industrial communication for several decades. Many legacy devices and systems in industrial environments still utilize it, and replacing or upgrading these systems can be expensive and time-consuming. As a result, it is often chosen to maintain compatibility with existing infrastructure.
2. Simplicity: it is known for its simplicity, which makes it easier to implement and troubleshoot. The protocol uses a straightforward client-server architecture, with a simple request-response model. Its design makes it suitable for resource-constrained devices and systems with limited processing power or memory.
3. Flexibility: it supports different transmission media, including Ethernet, serial communication (RS-232, RS-485), and even radio frequency. While optical fiber provides high bandwidth and long-distance capabilities, it can also function over these other communication mediums, allowing for a diverse range of deployment options based on specific requirements.
4. Cost-effectiveness: Implementing optical fiber infrastructure can be expensive, especially for smaller industrial facilities. In scenarios where the communication distance is relatively short or the data rate requirements are not very high, utilizing existing wired infrastructure (e.g., copper cables) with Modbus can be a more cost-effective solution.
5. Reliability: Optical fiber offers high reliability and immunity to electromagnetic interference, which is beneficial for critical communication systems. However, certain industrial environments may not require the same level of immunity or can implement appropriate shielding techniques to mitigate interference. In such cases, Modbus can still be reliable and perform adequately without the need for optical fiber.
While the use of it over optical fiber may not fully leverage the fiber’s capabilities, it provides a reliable and cost-effective option for communication in industrial environments, particularly when considering backward compatibility, simplicity, and interoperability with existing systems.it’s