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ToolsModbus Register/Address

Modbus Address & Register Calculator

Convert standard PLC addressing (e.g. 40001, 400001) to 0-based Modbus protocol hex offsets and diagnostic function codes.

Purpose & Calculation Breakdown (India)

Purpose of this Tool: Map between high-level SCADA HMI addressing schemes and low-level Modbus TCP/RTU byte frames.

• Register Offset Mapping:\text{Offset}_{0\text{-based}} = \text{Register}_{1\text{-based}} - 1
Input number (1 to 10000)
110000

PLC Addressing Styles

5-Digit Modicon40001
6-Digit Extended400001

Modbus protocol info

0-Based Hexadecimal Offset0x0000
Hex Offset
0-Based Decimal Offset0
Decimal Offset
Protocol Function Code (Read)FC03 (Read Holding Registers)
Modbus FC

Generates a formal executive feasibility proposal page ready for management sign-off & signatures.

Suggested Next Step

Need Modbus/SCADA integration support? Hire certified Remote IIoT Developers.