PROFIBUS FMS vs. Profibus

Attribute	PROFIBUS FMS	Profibus
Communication Protocol	Fieldbus Message Specification	Process Field Bus
Speed	Up to 12 Mbit/s	Up to 12 Mbit/s
Topology	Bus	Bus
Network Size	Up to 32 devices	Up to 127 devices
Transmission Medium	Twisted Pair	Twisted Pair

Introduction

PROFIBUS FMS and Profibus are both popular fieldbus communication protocols used in industrial automation. While they share some similarities, they also have distinct attributes that set them apart. In this article, we will compare the features of PROFIBUS FMS and Profibus to help you understand their differences and choose the right protocol for your application.

PROFIBUS FMS

PROFIBUS FMS, which stands for Fieldbus Message Specification, is a protocol developed by Siemens for high-speed communication in industrial automation systems. It is based on the PROFIBUS DP protocol but offers additional features for more complex applications. PROFIBUS FMS supports both cyclic and acyclic communication, making it suitable for real-time control and data exchange.

• Supports cyclic and acyclic communication
• Designed for high-speed communication
• Based on PROFIBUS DP protocol
• Offers additional features for complex applications

Profibus

Profibus, short for Process Field Bus, is a widely used fieldbus communication protocol in industrial automation. It is known for its flexibility, reliability, and ease of use. Profibus supports various communication speeds and can be used in both process automation and factory automation applications. It is a vendor-independent protocol, allowing devices from different manufacturers to communicate seamlessly.

• Flexible and reliable communication protocol
• Supports various communication speeds
• Vendor-independent protocol
• Used in process and factory automation

Speed and Performance

When it comes to speed and performance, PROFIBUS FMS is designed for high-speed communication, making it suitable for applications that require real-time control and fast data exchange. On the other hand, Profibus also offers high-speed communication but is more flexible in terms of communication speeds, allowing users to choose the speed that best suits their application requirements.

Complexity and Features

PROFIBUS FMS is known for its additional features that cater to more complex applications. It supports both cyclic and acyclic communication, making it suitable for applications that require real-time control and data exchange. Profibus, on the other hand, is a more straightforward protocol that offers flexibility and reliability without the added complexity of PROFIBUS FMS.

Vendor Compatibility

One of the key differences between PROFIBUS FMS and Profibus is vendor compatibility. PROFIBUS FMS is a protocol developed by Siemens, which means it may be more closely integrated with Siemens devices and systems. Profibus, on the other hand, is a vendor-independent protocol, allowing devices from different manufacturers to communicate seamlessly. This makes Profibus a more versatile option for users who work with a variety of devices from different vendors.

Conclusion

In conclusion, both PROFIBUS FMS and Profibus are popular fieldbus communication protocols used in industrial automation. PROFIBUS FMS is designed for high-speed communication and complex applications, while Profibus offers flexibility, reliability, and vendor compatibility. When choosing between the two protocols, consider your application requirements, the level of complexity needed, and the compatibility with your existing devices. Ultimately, the right choice will depend on your specific needs and preferences.