Convert standard PLC addressing (e.g. 40001, 400001) to 0-based Modbus protocol hex offsets and diagnostic function codes.
Purpose of this Tool: Map between high-level SCADA HMI addressing schemes and low-level Modbus TCP/RTU byte frames.
\text{Offset}_{0\text{-based}} = \text{Register}_{1\text{-based}} - 1Generates a formal executive feasibility proposal page ready for management sign-off & signatures.