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
140,708
141K
Online now
—
not captured in the last snapshot
Posts per day
11.0
from the last 100 posts, spanning 9.0 days
Comments per post
—
no sample yet
Growth · 7d
—
not enough history yet
Growth · 30d
—
not enough history yet
Promo tolerance
—
not assessed yet
Last post
Sep 7
sampled Sep 7
Distinct posters
99%
of the last 100 posts
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
Tracking since Sep 7 — growth charts appear after a week of history.
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See the full lists on similar subreddits.
r/PLC — frequently asked
How many members does r/PLC have?
r/PLC has 140,708 members as of our most recent crawl on Sep 7. 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?
We don't have 30 days of snapshot history for r/PLC yet, so we're not going to invent a growth number. We've been tracking it since Sep 7; the chart fills in as history accumulates.
How active is r/PLC?
Around 11.0 posts per day, measured from the newest 100 posts on Reddit, which span 9.0 days. Posting rate matters more than subscriber count when you're deciding where to spend your time — it determines how long your comment stays visible.
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.
Who posts in r/PLC?
Of the last 100 posts we sampled, 99% came from distinct accounts; the newest was published Sep 7. A low share means a feed dominated by a handful of accounts (bots, mods, or one prolific poster) rather than a community.
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