Formula and Inputs
EU = EUmin + (Raw - Rawmin) x (EUmax - EUmin) / (Rawmax - Rawmin).
VoltCheck24 Engineering Calculator
PLC Analog Scaling Calculator for 4-20mA and ADC Inputs
Generate engineering-unit scaling formulas for 4-20mA, 0-10V, and common PLC ADC raw ranges used in industrial automation.
How to use this calculator
- Collect the values below from the equipment nameplate, data sheet, or field measurement.
- Enter values using one consistent unit system and use worst-case operating conditions.
- Review the result, margin, and engineering note before selecting hardware.
- Cross-check the result with the related calculator and save the review for your project record.
Input checklist
- Signal type and range
- PLC raw minimum and maximum
- Engineering-unit minimum and maximum
- Vendor card data sheet
Industrial Use Cases
Use this page when commissioning Siemens, Rockwell, Mitsubishi, Omron, or custom PLC analog input ranges.
Engineering Note
Confirm the card’s actual raw count range, under-range and over-range behavior, signal type, and engineering-unit limits before downloading code.
FAQ
Which raw range should I use?
Use the exact range documented for the installed analog input module, not a generic 12-bit or 16-bit assumption.
Can I generate PLC code from the result?
The interactive calculator provides a scaling equation and vendor-oriented code guidance for commissioning.
Preliminary engineering reference only. Confirm final selections against current standards, project specifications, and manufacturer data.