Modbus address converter
Turn 40001 into protocol address 0, and back. Shows the data area, the function codes and 0-based, 1-based and PLC notation.
Free Modbus tools
Three small tools for the questions that come up during commissioning. They run in your browser and need no account or install.
Float and word order converter
Two registers that should be one number? See them as float32, uint32 and int32 under ABCD, CDAB, BADC and DCBA.
Modbus frame decoder
Paste hex from a capture or a log. It splits MBAP or RTU frames into fields, checks the length and CRC, and names exception codes.