Practical, no-fluff guides to working with Modbus devices
The differences between Modbus TCP/IP and RTU serial - framing, wiring, speed, and when to use each.
How 32-bit floats and integers span two registers, and how to get ABCD / DCBA / BADC / CDAB right.
What Modbus exception codes 01-04 mean and how to fix Illegal Function, Illegal Data Address and timeouts.
Want the fundamentals first? Read our Learn Modbus guide, or jump into the documentation.
Download ModbusBB and follow along - the free trial includes every feature.