Ladder Logic ElementsIntermediateAdvanced
1 min read
Updated 2025-11-10
Intermediate

Underflow Bit

UN - Underflow Bit

Status bit set when counter goes below zero or math result is too small.

Key Takeaways

  • Status bit set when counter goes below zero or math result is too small.
  • Intermediate-level topic in Ladder Logic Elements

Detailed Definition

Status bit set when counter goes below zero or math result is too small. This term is essential for understanding ladder logic in industrial automation and PLC programming.

Common Questions

What is Underflow Bit?

Status bit set when counter goes below zero or math result is too small.

What are related concepts I should learn?

To fully understand Underflow Bit, you should also familiarize yourself with TON (Timer On-Delay), TOF (Timer Off-Delay), and CTU (Count Up). These concepts work together in industrial automation systems.

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Quick Info

Difficulty
Intermediate
Tier
Advanced

About Ladder Logic Elements

Contacts, coils, timers, counters, and ladder diagram components

Total Terms:70
Difficulty:Beginner to Intermediate