Beginners Guide to Counting Encoder Pulses with Ladder Logic in GX Developer

Question:

Hello everyone! My name is Vidy, and I'm reaching out for assistance with a challenge I'm facing in programming with ladder logic. Specifically, I'm looking to learn how to utilize ladder logic to obtain feedback from an encoder for pulse counting. As a beginner in the world of Programmable Logic Controllers (PLCs), I understand that my inquiry might seem straightforward to seasoned experts. Are there any sample ladder logic programs or resources available that can guide me in counting the pulses generated by an encoder? Your support and insights would be greatly appreciated. Thank you!

Top Replies

For detailed information about HSC High-Speed Counters, it is essential to consult the programming manual.

Thank you for your assistance!

Hi Vidy! It's great to see you diving into ladder logic and PLCs! For counting pulses from an encoder, you might want to explore using one-shot rising or falling contacts, depending on your encoder's output. A common approach is to use a counter instruction that increments each time a pulse is detected. You can also refer to the user manuals for your specific PLC, as they often include example programs. Websites like PLCGurus.NET or the books by “Mark Randell” can be really helpful, too. Don’t hesitate to ask if you have more questions as you go along! Good luck, and happy coding!

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