OpenPLC is an open-source Programmable Logic Controller that is based on an easy to use software. It is the first fully functional standardized open source PLC, both in software and in hardware. The OpenPLC project was created in accordance with the IEC 61131-3 standard, which defines the basic software architecture and programming languages for PLCs.
Hello, I'm encountering an issue with monitoring the output in the monitoring tab of OpenPLC runtime. I'm using a basic blink program on a Raspberry Pi 4 Model B. It seems that two connections are necessary for the LED: one to GND (Pin 6) and the other to Pin 24 (8 PIO | %QX0.0). However, the LED is not blinking as expected. Interestingly, when I connect the GND to Pin 20 instead, the LED turns on but does not blink. Your assistance would be greatly appreciated.
Why I Cant Use Open PlC in my Windows 10 please help me. For my school final project
Месяц назад
Merhabalari Esp8266 kullanarak modbus tcp yapılandırması yapıyorum. Open PLC programından verdiğim ip adresi ile haberleşme gerçekleşmiyor. Ağda gördüğüm esp8266 nın ip adresini kullanarak modbus haberleşmesini yapabiliyorum ama o ip adresi de her bağlantıda değişiyor. Bunun bir çözümü var mı?
This program is truly outstanding. I have been programming Unitronics Unilogic, Visilogic and U90 series plc controller for years now. Unfortunately, cost is a big deterrent for some smaller companies just starting in manufacturing and or companies requiring control integration. Having the ability to use a cheaper Arduino board for smaller non industrial applications is amazing and game changing. Thank you sir.
Hello. First of all, the project is very good. I just think you're not automatician cause this is really not a good programmation method for that (there're so many way to make it easier :) ) If you need some help to make some program, I'll learn OpenPLC et come back again with automatician logic ;)
I'm a retired Industrial Controls Engineer. Very familiar with Ladder Logic programming and I am excited to use this. How do I edit? Where is documentation? You erased a line ( wire ) in the video ( at 6:35 ) and I hear you "hit" a key on your keyboard to delete it but, you didn;t say how you did it. I tried a few things but nothing. Can you help? Is there a documentation for instruction set and editing? I looked for it but not found...
Thanks Thiago! After finally escaping from a two-year long sidetrack into cybersecurity, I used this tutorial to get the PSM OpenPLC runtime peer-to-peer started. Now, an OpenPLC runtime instance can connect to other OpenPLC runtime "peers", read their coils, discretes, input and holding registers, and update the variables within the "client" instance of an OpenPLC runtime! The primitive code I have entered into the PSM can connect to multiple peers (my "heaviest" OpenPLC runtime client connects to 13 peers), and reads of discrete inputs and coils are successful, but that's only for a single PLC so far. The PSM "peer-to-peer" code is still too rough to release, but as soon as I get connection monitoring, read cycle throttling, and exception handling fleshed out a little better, I'll post it in the OpenPLC "projects" forum.
Hello Thiago. This needs a device able to run Python, like a Raspberry Pi with an OS. A lot of sensor have a C library to run on µC like Arduino. Would it be possible to mix LADDER and C/C++ programming to run on an Arduino ?
I am using a Arduino Uno. When i switch to the window "transfer to plc" it always shows [not installed] after the uno. i am running the softeare on windows 10. and the upload doesn't seem to work properly (the program doesn't change on the board). how can i fix this?
what to do if a after installing openplc runtime after running from search bar a new pop up window shows "cygwin is not installed. Please launch openplc installer".
Well explained. Do we have features on OpenPLC to make ESP32 as Modbus Master to make it read values from another Device/PLC, RTU or TCP over RS485 or Ethernet?
Hi, thanks for this cool an easy to use PLC Software. Can you tell me, how fast I can read an Input with OpenPLC on a Raspi? Can I count the speed of an motor with it?
I would really like to see this but ran off of some of the arduino LED display hats. That way if we use open plc on some aurdio running in a project we can get get a display built into the project itself. Instead of a pc running some HMI software. Full fat hmi displays are cool and all but a navigateable LCD display and menu would be perfect for some small scale machine control
When I install Runtime on windows 11 x64 system, it always stop at line "Package python3 installed", and will not not move forward to be sucessfuly installed. Could you support me for this issue? Many thanks.
I could not read the counter_value. then I assign the counter_value to the location: %QW1 and was able to read the counter_value , just in case some body was having the same problem. Also I use a program called ModbusTool V 1.1.4 an the register values were reading %QW0 (counter_max) = 2560 instead of 10, to fix that changing the byte order to: 2143 (was 1234 by default)
great project. out of curiosity how will these behave in the actual industrial environment filled with electrical noise ?? commercial PLCs have tricks like hardware de bouncers to handle inputs
Hi Triago, again, this is very amazing tutorial. At 15: 40, you talked a little bit about the integer data type here and said it is not a 'real' or 'float' data type in OpenPLC editor. you said Modbus is not define type, and also said a float would not fit into a QW location. Just don't quite follow this point. Hope you could elaborate more about this point.
Real or float are 32-bit variables. Modbus registers are 16-bit wide (QW). Therefore, floating point variables don’t fit on a single Modbus register. They can still be used by concatenation of two 16-bit Modbus registers, but the process is a bit more complicated.
When I try to read coil status in ScadaBR, the output gets reset automatically. Could you tell me whats going wrong? Also i am unable to monitor the status of digital input in ScadaBR in RMMS. I'd appreciate your insight
