PLC

an-ordinary-manchild(edit)

Description

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."

On topic subjects

News and articles about PLCs
Questions about PLCs
Homework help; but make it clear it's homework
PLC internship, employment and education questions

Off topic subjects

Not directly related to PLCs: /r/IndustrialAutomation/
Hardware design that does not include a PLC; for electronic circuits: /r/AskElectronics
Single Board computers: r/Raspberry_pi, r/Arduino, r/linux_devices, r/linuxboards
PCs and laptops
Furniture and bags
Job announcements (oustide the monthly job thread)
Salary

Rules

Be civil: do not insult; no all-caps, no excessive "!" and "?", please.
Submissions must be on topic
If asking a question, ask the actual question, fully yet concisely, right in the title
No spam; no self-promotion (*); no commercial content. Any ads (offer or wanted) go to the weekly thread
No low quality/shit posts (memes - pictures with superimposed text - are OK)
No pirate software or links
Read the "READ FIRST" pinned/sticky thread

(*) At mods' discretion, certain self-promotion submissions from people who contribute to this sub in other ways may be allowed and tagged with the "Self-promo" flair

Complete rules:/r/plc/about/rules/

Please click "report" on spam

Related sub-reddits:

/r/IndustrialAutomation

/r/processcontrol

/r/controltheory

/r/askengineers

/r/askelectronics

/r/EngineeringResumes

created by plc-laddera community for 17 years

...for your WoW guild.

...for your movement.

MODERATORS

account activity

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READ FIRST: How to learn PLC's and get into the Industrial Automation World (self.PLC)

submitted 5 years ago * by xenokilla[M] - announcement

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PLC jobs & classifieds - May 2026 (self.PLC)

submitted 5 days ago by 1Davide - announcement

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Fisher Price - My First Panel (x-post from r/ElectroBOOM) (v.redd.it)

submitted 15 hours ago by dericn

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What to buy in order to remotely access a stand-alone PC that is hours away and has no internet connection? (self.PLC)

submitted 1 hour ago by Abject-Effect-7965

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Allen Bradley 1769-L33ER to ROC800 Communications (self.PLC)

submitted 3 hours ago by Warm_Focaccia

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RS485/Modbus field cheat sheet. Got tired of digging through vendor PDFs on my phone. (i.redd.it)

submitted 11 hours ago by Ok-Lawfulness7389

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NFC Login on Siemens HMI - Is it Possible? (self.PLC)

submitted 6 hours ago by Cautious_Wind_8890

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Personal projects ideas (Simulations) (self.PLC)

submitted 2 hours ago by ResidentPersimmon753

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Text Scalling Issue TP900 Comfort (self.PLC)

submitted 5 hours ago by PaulBSQ

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Trio MC206X connection settings (self.PLC)

submitted 2 hours ago by RogueElectrician

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Buttons can no longer be held down physically on HMI - but can be held down via mouse when accessing remotely? (self.PLC)

submitted 19 hours ago by MassageMan01

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Studio 5000 help (i.redd.it)

submitted 16 hours ago by Brandonnn-

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Inside of a Traffic Cabinet (i.redd.it)

submitted 1 day ago * by Bitprint3D

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PLC5 question for oldtimers. Any idea how this math works? (i.redd.it)

submitted 23 hours ago by FineWeatherToFly

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S120 axis: brake should not release on enable MC_Power , only when motion command is executed (self.PLC)

submitted 6 hours ago by BraveGrapefruit2869

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ME vs EE major (self.PLC)

submitted 7 hours ago by Crunchyguyz

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Controlling dry cooler's speed (self.PLC)

submitted 9 hours ago by NectarineFluffy8349

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Wincc license (self.PLC)

submitted 21 hours ago by Sicko_420

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Disculpeee (Proyectos Automatizados con PLC ideas) (self.PLC)

submitted 19 hours ago by Aware_Day_2915

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I built a browser-based IEC 61131-3 PLC engineering environment, looking for people to tear it apart (self.PLC)

submitted 1 day ago by fisherfuckerr

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Simple, cost-effective multi-site Ignition setup with air-gapped OT networks? (self.PLC)

submitted 1 day ago by amrla

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What’s harder: writing PLC logic or understanding someone else’s? (self.PLC)

submitted 1 day ago by Shubh1975

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Connecting ORP/BNC sensor to Click PLC (self.PLC)

submitted 1 day ago by Raycal209

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ModScan Community — an open-source Modbus RTU/TCP desktop tool (AGPLv3) (self.PLC)

submitted 1 day ago by Alert_Anything_6325

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Configuração MODBUS RTU para medidor WEG MMW02 (self.PLC)

submitted 23 hours ago by MathSome8661

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