The Beckhoff BX3100 is a PROFIBUS Bus Terminal Controller that combines the functionality of a PROFIBUS fieldbus coupler with the processing power of an integrated PLC. Designed for decentralised automation architectures, it enables local control tasks to be executed directly at the field level, while ensuring seamless communication with higher-level PROFIBUS masters.

At its core, the BX3100 is engineered to provide robust PLC functionality. It comes with 256 kB of program memory and 256 kB of data memory, giving engineers ample resources to implement complex logic for distributed applications. Additionally, it includes 2 kB of remanent data storage and 1 kB of persistent data storage, ensuring critical information and parameters are retained even after a power cycle. This data retention capability enhances reliability in applications where consistency and restart behaviour are critical.

The BX3100 supports one PLC runtime task, designed to deliver high-speed execution with predictable performance. With a PLC cycle time of approximately 1 ms per 1,000 instructions (excluding I/O cycle), the device ensures responsive operation, even in time-sensitive control environments. This performance makes it suitable for localised machine control, process monitoring, or handling subsystems within a larger PROFIBUS-based network.

One of the controller’s key advantages is its flexibility in programming and configuration. Engineers can use Beckhoff’s TwinCAT automation software, programming either directly via a dedicated programming interface or through the PROFIBUS fieldbus connection. This flexibility makes commissioning and integration straightforward while aligning with established Beckhoff engineering workflows.

As a PROFIBUS controller, the BX3100 provides seamless connectivity between the Beckhoff Bus Terminal I/O system and the PROFIBUS network. This allows a wide variety of digital, analogue, and special-function terminals to be used, giving integrators the ability to adapt the I/O configuration to the exact needs of their application. The combination of bus coupling and PLC capability in a single device reduces hardware requirements and simplifies wiring, offering a compact and cost-effective solution for distributed control.

The compact design of the BX3100 makes it easy to install directly into control cabinets or distributed control panels. Its integration of both fieldbus communication and PLC processing reduces the need for additional hardware, lowering engineering costs and cabinet space requirements.

Typical applications for the BX3100 include packaging machinery, logistics and material handling systems, process automation, and building control. In these environments, the device ensures efficient decentralisation of control, enabling subsystems to operate independently while still coordinating seamlessly with higher-level PROFIBUS controllers.

In summary, the Beckhoff BX3100 PROFIBUS Bus Terminal Controller delivers a powerful combination of fieldbus coupling and integrated PLC functionality. With fast processing times, robust memory resources, and flexible programming options, it provides a compact and scalable solution for distributed automation. Built for reliability and performance, it is an ideal choice for engineers seeking to integrate PROFIBUS-based systems with decentralised control capabilities.