r/PLC↗
PLC - Programmable Logic Controllers
This sub is dedicated to discussion and questions about Programmable Logic Controllers (PLCs): "an industrial digital computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis."
144k subscribers560 posts / mo in Sep 2026477 authors / mosince 2009
r/PLC has 144k members (+21% over the last 12 months). It gets about 560 posts a month from 477 people. Top topics: Civil Engineering Careers, Conveyor Systems and Airflow Panels.
When to post on r/PLC
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How r/PLC has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/PLC
Top topics
Share of the subreddit's posts
- Civil Engineering Careers1.8%
- Conveyor Systems0.4%
- Airflow Panels0.3%
- Electrician Apprenticeship0.3%
- RC Servo & Steering0.3%
Brands people mention
Most-mentioned brands and sites, last 12 months
- Siemens
- Rockwell Automation
- Phoenixcontact
- Schneider Electric
Everything else about r/PLC
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research