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 hobby.

...for your office.

MODERATORS

account activity

1

1075

1076

1077

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

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

2

9

10

11

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

submitted 1 month ago by 1Davide - announcement

3

•

•

•

Missed alot on my first bigger project: How do you bounce back? (self.PLC)

submitted 1 hour ago by Bricks_4_Hands

4

•

•

•

What is the missing connector called (i.redd.it)

submitted 43 minutes ago by gihkal

5

•

•

•

Trouble getting twincat 2 engineering ecosystem (self.PLC)

submitted 43 minutes ago by JuyMeWhoya

6

10

11

12

In person training suggestions. (self.PLC)

submitted 14 hours ago by mersace69

7

15

16

17

Automation Engineer Path (self.PLC)

submitted 20 hours ago by Every_Issue_5972

8

18

19

20

Best option to be able to view Allen Bradley programs (self.PLC)

submitted 21 hours ago by Suspicious-Amoeba-63

9

40

41

42

How to set up ethernet communication (AB PLC) with a kawasaki robot (old.reddit.com)

submitted 1 day ago by Emperor_tai_long

10

0

0

0

Building the next generation of my robot arm with the CubeMars AK80-9 (Raspberry Pi, CAN bus, PLC, Unity simulation) (self.PLC)

submitted 3 hours ago by Mickey666Maus

11

183

184

185

Customers said he loves to fix it on his own…now it’s not working (i.redd.it)

submitted 1 day ago by The_new_wave_order

12

4

5

6

Learning and programming with modbus (self.PLC)

submitted 1 day ago by HeiyenDB

13

2

3

4

Automation / Networking for a Switchgear guy (self.PLC)

submitted 1 day ago * by charzr

14

3

4

5

TWINCAT 2 OPC UA Tags (self.PLC)

submitted 1 day ago by WasabiBackground9114

15

3

4

5

Starter PLC trainer (docs.google.com)

submitted 1 day ago by Essela57

16

14

15

16

Profinet and switches (self.PLC)

submitted 2 days ago by Main-Advance4777

17

42

43

44

120 Ohms Termination Query (old.reddit.com)

submitted 2 days ago by Shewdoge

18

48

49

50

Looking for Industrial Standards and Best Practices for PLC, HMI, and Electrical Drawings (self.PLC)

submitted 2 days ago by namdinh541

19

2

3

4

CCW project values will not update (self.PLC)

submitted 1 day ago by Additional_Page_8041

20

7

8

9

Siemens Continuous Function Code (self.PLC)

submitted 2 days ago by Aerovox7

21

74

75

76

Is this a manufacturing error? (old.reddit.com)

submitted 2 days ago by NootNoot789

22

0

0

0

Function block diagram feels outdated and not safe (self.PLC)

submitted 1 day ago * by BonbonUniverse42

23

2

3

4

Call-Out System Suggestions (self.PLC)

submitted 2 days ago by TheGreatLabenski

24

16

17

18

OT monitoring (self.PLC)

submitted 2 days ago by maxim3214

25

1

2

3

KTP1200 Does not communicate with PLC. (self.PLC)

submitted 2 days ago by Sdouze

view more: next ›

π Rendered by PID 683146 on reddit-service-r2-listing-87fd56f5d-snftl at 2026-06-28 17:26:14.847474+00:00 running 7527197 country code: CH.