r/PLC

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About r/PLC

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."

The community at a glance

r/PLC is a Subreddit for Hardware and Robotics Enthusiasts with roughly 135K members. It uses a forum format for communication. It is the 7th largest community in the Robotics topic page and the 9th largest community in the Hardware topic page.

Roughly 26K members have joined in the past year. Popular discussion topics include Plc, Looking For, and Automation. Common discussion themes are Advice Requests and Solution Requests. Product recommendations often mention plc, laptop, and hmi.

On Reddit
135K Members

Community Topics

Community Features

Forum

This community has a forum

Subreddit Analysis

via GummySearch
Yearly: +26K members
Growth: +23.7% / year

Member growth over time

All time (yearly)

  • 2014: 1K members
  • 2015: 1K members
  • 2016: 1K members
  • 2017: 2K members
  • 2020: 19K members
  • 2021: 12K members
  • 2023: 34K members
  • 2024: 23K members
  • 2025: 27K members
  • 2026: 13K members

Past year (monthly)

  • Jul: 3K members
  • Aug: 2K members
  • Sep: 2K members
  • Oct: 2K members
  • Nov: 2K members
  • Dec: 2K members
  • Jan: 2K members
  • Feb: 2K members
  • Mar: 2K members
  • Apr: 2K members
  • May: 2K members
  • Jun: 2K members

Themes

  • Advice Requests
    8 posts in the past month
    1. “RS Automation” PLC
    2. Controls Engineer Job Doubts
    3. Career Change without an Engineering/Electrician Background
    #1
    Advice Requests
    “RS Automation” PLC · Controls Engineer Job Doubts · Career Change without an Engineering/Electrician Background
    8
  • Solution Requests
    5 posts in the past month
    1. PLC Ladder Logic Simulator and Learning Platform — Free, No Ads, Feedback Welcome
    2. I built a browser-based IEC 61131-3 PLC engineering environment, looking for people to tear it apart
    3. Can anyone help identify: What this error means? Possible causes Troubleshooting steps This is used on an oil rig control system. Any help would be appreciated.
    #2
    Solution Requests
    PLC Ladder Logic Simulator and Learning Platform — Free, No Ads, Feedback Welcome · I built a browser-based IEC 61131-3 PLC engineering environment, looking for people to tear it apart · Can anyone help identify: What this error means? Possible causes Troubleshooting steps This is used on an oil rig control system. Any help would be appreciated.
    5
  • Ideas
    2 posts in the past month
    1. I got tired of our PLC coding standards living in a PDF nobody re-reads, so I built a linter for Structured Text
    2. Personal projects ideas (Simulations)
    #3
    Ideas
    I got tired of our PLC coding standards living in a PDF nobody re-reads, so I built a linter for Structured Text · Personal projects ideas (Simulations)
    2
  • Pain & Anger
    2 posts in the past month
    1. easter eggs…
    2. Honestly, are people generally miserable in this field?
    #4
    Pain & Anger
    easter eggs… · Honestly, are people generally miserable in this field?
    2

Topics

  • Plc
    204 posts in the past month
    1. Rate my PLC lab setup & project ideas for Siemens S7-313C and KTP700
    2. Old cabinet day! How do I pull a backup/ go online with this old TI Series 500 plc?
    3. PLC Ladder Logic Simulator and Learning Platform — Free, No Ads, Feedback Welcome
    #1
    Plc
    Rate my PLC lab setup & project ideas for Siemens S7-313C and KTP700 · Old cabinet day! How do I pull a backup/ go online with this old TI Series 500 plc? · PLC Ladder Logic Simulator and Learning Platform — Free, No Ads, Feedback Welcome
    204
  • Looking For
    87 posts in the past month
    #2
    Looking For
    87
  • Automation
    67 posts in the past month
    1. 2 yrs in automation and i feel like the more i learn the more i realize how little i know ; is being a polymath actually realistic in this field or should i just specialize ?
    2. One thing that surprised me about modern automation projects
    3. New job in industrial automation (IT background). advice for beginners?
    #3
    Automation
    2 yrs in automation and i feel like the more i learn the more i realize how little i know ; is being a polymath actually realistic in this field or should i just specialize ? · One thing that surprised me about modern automation projects · New job in industrial automation (IT background). advice for beginners?
    67
  • Struggling
    43 posts in the past month
    #4
    Struggling
    43
  • Engineering
    35 posts in the past month
    1. I built a browser-based IEC 61131-3 PLC engineering environment, looking for people to tear it apart
    2. Engineering or technician role for first job
    3. OT Network Engineering
    #5
    Engineering
    I built a browser-based IEC 61131-3 PLC engineering environment, looking for people to tear it apart · Engineering or technician role for first job · OT Network Engineering
    35

Flair

  • Bad title
    1 post in the past month
    1. Certificate from Siemens
    #1
    Bad title
    Certificate from Siemens
    1
  • Spam
    1 post in the past month
    1. The parts of automation nobody talks about until they break the line
    #2
    Spam
    The parts of automation nobody talks about until they break the line
    1

Product recommendations

  • plc
    11 posts in the past month
    1. Best 500/600$ PC for PLC programming?
    2. What is best Family and Brand of PLC to use in a new automated factory with IIOT in mind? Read Comment for Background.
    3. What is best Family and Brand of PLC to use in a new automated factory with IIOT in mind? Read Comment for Background.
    #1
    plc
    Best 500/600$ PC for PLC programming? · What is best Family and Brand of PLC to use in a new automated factory with IIOT in mind? Read Comment for Background. · What is best Family and Brand of PLC to use in a new automated factory with IIOT in mind? Read Comment for Background.
    11
  • laptop
    5 posts in the past month
    1. Best portable "Desk" for laptops?
    2. Need advice on the best laptop for student
    3. Need advice on the best laptop for student
    #2
    laptop
    Best portable "Desk" for laptops? · Need advice on the best laptop for student · Need advice on the best laptop for student
    5
  • hmi
    5 posts in the past month
    1. What are the best web based HMI solutions out there for small systems?
    2. Recommended Free HMI/SCADA Platform for Proof of Concept?
    3. Recommended Free HMI/SCADA Platform for Proof of Concept?
    #3
    hmi
    What are the best web based HMI solutions out there for small systems? · Recommended Free HMI/SCADA Platform for Proof of Concept? · Recommended Free HMI/SCADA Platform for Proof of Concept?
    5
  • courses
    5 posts in the past month
    1. Please recommend some courses or learning materials
    2. recommend me a course for abb automation builder.
    3. Please I am a beginner in automation. Please I need a guide in this journey or a roadmap that will be of great help in this journey... Please this is what I love and want to be a great person in this. Please recommend books,videos, courses and all. God bless you
    #4
    courses
    Please recommend some courses or learning materials · recommend me a course for abb automation builder. · Please I am a beginner in automation. Please I need a guide in this journey or a roadmap that will be of great help in this journey... Please this is what I love and want to be a great person in this. Please recommend books,videos, courses and all. God bless you
    5
  • label makers
    2 posts in the past month
    1. Please recommend label makers for wiring/tubing
    2. Please recommend label makers for wiring/tubing
    #5
    label makers
    Please recommend label makers for wiring/tubing · Please recommend label makers for wiring/tubing
    2
View full analysis on GummySearchSynced 6/16/2026

Frequently asked questions

Who is r/PLC for?
Best for Hardware and Robotics Enthusiasts enthusiasts looking for a Reddit-based community with forum discussion.
Is r/PLC free to join?
This listing is not marked as paid-only. Access rules and any fees are decided by the community.
How many members does r/PLC have?
Roughly 135K members, based on figures reported by the community or its host. Member counts are approximate and change over time.
What platform is r/PLC on?
r/PLC runs on Reddit. Reddit communities (or "subreddits") are forum-based groups on the popular social news aggregation, web content rating, and discussion website Reddit. Reddit is commonly known as "the front page of the internet". Users submit content to the site such as links, text posts, and images, which are then voted up or down and discussed by other members. From investing Reddit communities, to professional ones, to ones just for laughs, you're likely to find a community for you on Reddit.
What topics does r/PLC cover?
On the Hive Index, r/PLC is organized under Hardware, Robotics Enthusiasts.
How do I join r/PLC?
You can join r/PLC by clicking this link, or pressing the "Go to community" button above.
What are the Hardware communities like?
Communities for hardware engineers, electronics hobbyists, and embedded systems developers. Discord and Reddit host communities for Arduino, Raspberry Pi, PCB design, and DIY electronics, alongside more professional spaces for engineers working on commercial hardware products.
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Added 4/23/2026

Monthly Stats

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