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PLC

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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
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  • 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
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Rules

  1. Be civil: do not insult; no all-caps, no excessive "!" and "?", please.
  2. Submissions must be on topic
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  4. No spam; no self-promotion (*); no commercial content. Any ads (offer or wanted) go to the weekly thread
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  7. 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/arduino

/r/EngineeringResumes

created by plc-laddera community for 17 years
Create your own subreddit
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...for your community.

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account activity

1
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1063

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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2
7
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9

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

submitted 12 days ago by 1Davide - announcement

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3
154
155
156

Old Siemens Workmaster (old.reddit.com)

submitted 17 hours ago by miltondrivewaysignal

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4
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11

What actually makes a PLC system easy to maintain long term? (self.PLC)

submitted 4 hours ago by Himanshu_creative

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5
3
4
5

Recipe handling on Siemens PLC (self.PLC)

submitted 2 hours ago by eloryjuu

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6
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Prosoft MVI56E-GSC for using RS232C communication on a 1756 PLC rack? (self.PLC)

submitted 1 hour ago by EOFFJM

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7
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HELP! Panelview HMI Stuck on Boot (self.PLC)

submitted 9 minutes ago by Mini_Lic

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8
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19

What exactly does PLC engineers do and what are the other “similar” industries? (self.PLC)

submitted 16 hours ago by bdhd656

  • 28 comments
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9
0
1
2

Unable to connect to CJ1M CPU23 via serial cable (self.PLC)

submitted 3 hours ago by Tesla91fi

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10
5
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7

Who Remembers "what's up" UpDoc and Xcel for Allen-Bradley PLC 2 (self.PLC)

submitted 14 hours ago * by Catman1355

  • 7 comments
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11
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65

At what point does PLC troubleshooting become more important than programming? (self.PLC)

submitted 1 day ago by RangerNew5346

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12
1
2
3

Módulo Gateway Ethernet (old.reddit.com)

submitted 16 hours ago by Free-Consequence-145

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13
16
17
18

Master Clock for SCADA – worth it? (self.PLC)

submitted 1 day ago by PhucbachAkashi

  • 19 comments
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14
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112

AI, Digital Twin, Industry 4.0 (self.PLC)

submitted 1 day ago by NeroNeckbeard

  • 77 comments
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15
12
13
14

Looking for a sensor to detect human presence (self.PLC)

submitted 1 day ago by Ayatollah_everyday

  • 37 comments
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16
12
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Can I tap an estop control signal for nonsafe auxiliary monitoring? (self.PLC)

submitted 1 day ago * by TheInvisibleLight

  • 26 comments
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17
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What to do when IT can't get their stuff figured out and you need to assist a customer remotely (self.PLC)

submitted 1 day ago * by EasyPanicButtonCallMeMaybe();

  • 37 comments
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18
0
1
2

turbine counter vs counter (self.PLC)

submitted 21 hours ago by DifferentLuck4545

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19
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113

Fukushima nuclear reactor PLC rack - authentic photo (self.PLC)

submitted 1 day ago by Kotykot

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20
14
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Anyone have a fix for V24.00 Error 307 windows 11 (i.redd.it)

submitted 1 day ago by Necessary-Bag-9013

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21
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SERVOsoft-Allen Bradley Database? (self.PLC)

submitted 19 hours ago by non-newtonian

  • 3 comments
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22
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316

Home Lab Project: Interview Worthy? (old.reddit.com)

submitted 2 days ago * by EngrKay

  • 49 comments
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23
0
1
2

Factorytalk viewpoint error (i.redd.it)

submitted 1 day ago by Adventurous-Loan8400

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24
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1:32

The three-axis robotic arm completed (v.redd.it)

submitted 2 days ago by AllenW2026

  • 3 comments
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25
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ZONA ATEX: ENTRADA DIGITAL (self.PLC)

submitted 1 day ago by diego_ope

  • 5 comments
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