Variables & Datatypes in Structured Text | Studio 5000 Beginner Guide

Описание: Have you ever written Structured Text that compiles perfectly…
but the PLC behaves completely wrong?

This is not a syntax problem.
It’s a datatype problem.

In this beginner-friendly Studio 5000 tutorial, you’ll learn how PLC variables and datatypes actually affect program behavior — and why choosing the wrong datatype leads to silent bugs that are hard to troubleshoot.

🎯 What you’ll learn in this video:

What a variable really is in a PLC (memory + datatype + scope)

Program scope vs Controller scope (and when to use each)

Common BOOL vs DINT mistakes beginners make

Why integer math behaves differently than REAL math

How to avoid silent math bugs like 5 / 2 = 2

How STRING datatypes work in Studio 5000

Why CONCAT behaves differently than in Python or C

Practical rules for choosing the right datatype every time

This video is part of a Structured Text Beginner Series for Studio 5000 users and is designed to be watched in order.

🔗 Next videos in this series:

▶ Assignments & Expressions in Structured Text
▶ IF / CASE Logic in Structured Text
▶ Loops in Structured Text (FOR / WHILE / REPEAT)

👷 Who this video is for:

PLC beginners learning Structured Text

Ladder programmers moving to Structured Text

Engineers frustrated by logic that “looks right but acts wrong”

Anyone using Studio 5000 (ControlLogix / CompactLogix)

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