Beckify Electrical Engineering Toolbox
Modbus Address Converter
Convert Modbus coils and registers among function code, 0-based PDU offset, 1-based number, 5-digit 40001 addressing, and 6-digit 400001 long addressing. Shows wire/PDU bytes. Not a slave simulator.
About this calculator
Use this free browser-based calculator to work through the relevant electrical inputs, review the result, and compare it with field conditions.
For design, installation, or safety decisions, verify assumptions against the applicable code edition, equipment documentation, and site requirements.
Open the interactive tool