# 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.