Convert raw counts / 4–20 mA ↔ engineering units — the math every controls tech does daily.
1 · Set your ranges
2 · Raw → Engineering units
Scaled value
—
⚠ Raw value is outside the configured range — reading is extrapolated (check the signal).
3 · Engineering units → Raw
Raw count the PLC should read
—
⚠ Value is outside the configured EU range.
The formula (so you can do it in ladder)
Raw count ranges vary by PLC module and data format — confirm yours against the module's manual. If the reading's off, check the raw range, a swapped min/max, or the field device — not the math.