This ladder logic is designed to increment New_Data safely and exactly once per trigger. To fully understand why the SET and RESET are placed where they are, we must follow the actual PLC scan sequence as it happens in your program. PLC executes logic: Left → RightTop → BottomEvery scan cycle Let’s break down the … Read more
Modern industrial machines often require simple and reliable control using minimal hardware. One common requirement is to start and stop a motor using a single push button instead of separate Start and Stop buttons. This article explains a Single Push Button Start–Stop PLC logic using edge detection (P_TRIG) and memory bits, as shown in the … Read more
Here’s a simple PLC program example to understand the basic logic — written in Structured Control Language (SCL) for Siemens TIA Portal. This example turns ON an output when a button is pressed
