4-20ma

4-20 mA Scaling in a PLC: ST and Ladder Code

Turn a raw 0-32767 analog count into bar, °C or m³/h. Full 4-20 mA scaling walkthrough with structured text and ladder code for Studio 5000 and TIA Portal.

Jul 12, 2026 · 7 min read

4-20 mA Scaling Formula: The PLC Engineer's Guide

Master the 4-20 mA scaling formula for PLCs. Covers the math, raw count ranges, live worked examples, and structured text code you can use today.

Jun 30, 2026 · 6 min read

PLC Analog Input Wiring: 4-20 mA Step by Step

Wire a 4-20 mA transmitter to a PLC analog input without ground loops or signal noise. Covers 2-wire, 3-wire, 4-wire devices, shielding and raw count scaling.

Jun 29, 2026 · 6 min read