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level of difficulty: Intermediate⭐⭐

Which communication protocol is primarily used for real-time distributed control? 

What type of sensor is commonly used to detect the presence of metal objects? 

What is Ethernet?💡
Explore the essentials of hashtag #Ethernet  through these slides and learn how it connects devices across various settings. Feel free to share your insights in the comments for a deeper understanding of this foundational networking technology! 

level of difficulty: Intermediate ⭐⭐ 

What sets a PLC apart from a DCS? 

Why is 4-20 mA signal favored over 0-10 V? 

level of difficulty: Easy ⭐

What does PLC stand for in the context of industrial automation? 

level of difficulty: Intermediate 🤔

Which of the following is NOT directly powered by the PLC power supply? 

In  #PLC  programming, a Contact instruction represents a Boolean input. We have Normally Open (NO) and Normally Closed (NC) Contacts in Ladder Diagram programming language.

Normally Open Contact instruction evaluates to True when its associated variable is True and False when its associated variable is False.

The Normally Closed Contact instruction has the exact opposite behavior as the NO Contact instruction. The NC Contact instruction evaluates to True when its associated variable is False and evaluates to False when its associated variable is True.

Essentially, the NC Contact is a NO Contact instruction with a NOT operator applied to it.

The NC Contact is a very important tool for situations where you want to have logical continuity on a rung when a condition is not True. 

If you are interested in learning more about PLC programming, you can check out our course CODESYS 1: Introduction to PLC Programming: 
 https://www.realpars.com/courses/codesys-1-introduction-to-plc-programming