> For the complete documentation index, see [llms.txt](https://support.powerio.com/hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.powerio.com/hub/blog/en/news-blog/faster-modbus-communication-for-t1.b100.md). # Faster Modbus communication for T1.B100 ### **New buffer optimization revolutionizes serial data transmission** With the release of firmware version 4.3 for the powerIO Box T1.B100, powerIO has reached a significant milestone in performance optimization. The new version delivers a drastic improvement in serial communication speed. ### Triple speed for Modbus RTU Through intelligent adjustments in data processing, Modbus RTU queries now achieve up to 3 times higher speed. The actual speed increase depends on the connected Modbus device and the baud rate used. This improvement is particularly relevant for applications with: * High number of Modbus participants (up to 32 devices per port) * Time-critical data queries * Extensive data points per polling cycle * Installations with multiple parallel serial ports ### Technical optimizations in detail The performance increase was achieved through several measures: **FTDI latency timer optimization**: The USB serial buffer was minimized to reduce delays in data transmission. This ensures more direct and faster communication between the powerIO Box and the connected devices. **Parallel port polling**: Whereas serial ports were previously polled sequentially, data collection now occurs fully in parallel. In systems with multiple active ports, this means a significant time saving for the overall system. **Intelligent error handling**: The system now responds more robustly to I/O errors and connection interruptions. Automatic reconnection logic ensures that temporary disruptions no longer affect overall performance. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://support.powerio.com/hub/blog/en/news-blog/faster-modbus-communication-for-t1.b100.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.