r/PLC
PLC - Programmable Logic Controllers
Founded May 2009 · Public — anyone can post
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."
Members
142,736
143K
Online now
—
not captured in the last snapshot
Posts per day
—
no sample yet
Comments per post
—
no sample yet
Growth · 7d
—
not enough history yet
Growth · 30d
+1.4%
+2K members · ≈31d
Promo tolerance
—
not assessed yet
Last post
—
no sample yet
Distinct posters
—
no sample yet
Tracking since Sep 7 · growth spans are the real distance between snapshots, not rounded windows. Posts/day is measured from the community’s own newest posts on Reddit, not from what Prowlo happens to crawl.
Member growth
Similar by content
Communities that discuss what r/PLC discusses.
This sub is dedicated to discussion and questions about embedded systems: "a controller programmed and controlled by a real-time operating system (RTOS) with a dedicated function within a larger mechanical or electrical system, often with real-time computing constraints."
A place to ask questions, discuss topics and share projects related to Electrical Engineering.
A subreddit for programmable hardware, including topics such as: * FPGA * CPLD * Verilog * VHDL
###[Read the rules before posting!](http://www.reddit.com/r/robotics/wiki/rules) ###[How to get started in robotics](https://www.reddit.com/r/robotics/wiki/get_started) ###[See the Wiki for frequently asked questions, career advice, resources, and previous AMAs](https://www.reddit.com/r/robotics/wiki/index) ###[Official Discord Server](https://discord.gg/sbueZeC) ####For any question, please post on our sister subreddit /r/AskRobotics. ---------------- #### This subreddit is a place for
See the full lists on similar subreddits.
r/PLC — frequently asked
How many members does r/PLC have?
r/PLC has 142,736 members as of our most recent crawl on Oct 8. Prowlo re-checks tracked communities on a rolling schedule, so this figure moves rather than sitting frozen at whatever it was when a scraper last ran.
Is r/PLC growing?
Over the last ≈31 days r/PLC changed by +1.4% — a gain of 2K members. We compare against the nearest snapshot we actually hold and state the real span rather than rounding it to a clean "30 days".
How active is r/PLC?
We don't have a reliable posting-rate sample for r/PLC yet. Subscriber count alone is a poor guide to whether a community is active, so treat this one as unverified until the next sample lands.
When was r/PLC created?
r/PLC was founded in May 2009 and is a public — anyone can post community. Age matters: an older community with steady growth has survived Reddit's moderation churn; a young one with a spike may not.
Can I promote my product in r/PLC?
We don't have a promo-tolerance read for r/PLC yet. Default to the safe approach: read the sidebar rules, contribute in threads where you gain nothing, and mention your product only when it is the honest answer to someone's question.
How do I monitor r/PLC for mentions?
Hit Watch on this page. Prowlo starts crawling r/PLC into your Dataset — every new post indexed and embedded, searchable semantically, queryable by your AI agent over MCP, and able to trigger keyword alerts in Slack. Prowlo is read-only; it never posts on your behalf.
Can my AI agent read r/PLC's stats?
Yes. Everything on this page is one MCP tool call away: catalog_get_subreddit returns r/PLC's members, growth, promo tolerance and similar communities as typed JSON — free, no credits. Connect your agent to api.prowlo.com/mcp and it can vet the community and start watching it in the same conversation.
Read-only · Human-in-the-loop
Prowlo never posts for you
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