Using Python To Read PLC Data With Visual Studio By Importing Pycomm3

[@ShaneWelcher]

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[@darthenx2585]

Great information. Possibly expand a bit more on how to for example read a int or dint , create a simple calculation and then out put the value to another device like a server or another plc

[@ShaneWelcher]

10-4, I will make a few more videos using Pylogix

[@dustin9480]

Nice video Shane! I appreciate you showing pylogix. I've always wanted to make videos but I feel weird listening to myself :)

[@ShaneWelcher]

That is something I had to get used to as well, just give it a go & adjust as needed. You got this!

[@johntgilmore1]

Dustin, on git hub you have helped me so, so, so freaking much may I share with you what I have done

[@chuystark]

Hello, i've been trying to connect to a logix5561 but i get unknown error errno [111] connection refused, do you have any idea of what could be happening?

[@ShaneWelcher]

What communication protocol are you using?

[@dustin9480]

That error comes from pythons socket module, not the PLC. So you are not connecting to the PLC. Make sure you can successfully ping the ethernet module in your ControlLogix rack first. If your L61 is not in slot 0, then make sure you specify which slot it is in.

[@chuystark]

Yes, i could successfully ping it, the ip was in the same segment, the weird thing is that with pycomm3 i dindn’t have any problems but with pylogix i wasn’t able to read the tags

[@ShaneWelcher]

@@chuystark Probably missing an updated version of pylogix. Or the import of the needed files.

[@kavinyudhitia]

WOW! Very educative!!! thanks!! Subscribed!

[@notme22]

Thank you! Do you know if this can read tag values fast enough for motion axis? I’m looking for an easy way to sample a 10000 count encoder every 100 counts over 0.75 seconds and this seems to bypass having to learn/pay for the ODVA standards needed for IO Messaging.

[@ShaneWelcher]

Depends on the timing used

[@vivekpatil7967]

How to set PLC slot if a PLC controller is fitted in Chassis?

[@ShaneWelcher]

Look on GitHub

[@daviddemjan1916]

Hi! I would like to ask for some help. I was able to gather the informatiom from PLC control tag (RSLOGIX 5000) but not able to work with it. So if I want to handle that information in forexample in an If statement I won't be able to work with it. import time from PIL import Image from pycomm3 import LogixDriver from tkinter import * with LogixDriver('here my IP adress I removed it') as plc: valami = plc.read('valami') print(valami) if valami: print("works") else: print("Doesn't work") It always says its true even if i toggle the bit to False. It will never go to else branch. Thanks for help.

[@ShaneWelcher]

Sounds like you do not have an active tag or your update time is incorrect, not sure what you are using for python programming I use VS code which is a manual trigger the code that reads the tags so it requires me to trigger the python code to get refreshed data

[@daviddemjan1916]

@@ShaneWelcher I do have an active tag, could you please share your mail I'll send you the picture what I have on pycharm.

[@ShaneWelcher]

I would recommend you reach out to the GitHub, I did not design Pycomm

[@cmrncrick]

Whenever you toggle the bit are you restarting the script? If not then I don't think your value will be automatically updated because the python script isn't looping in that code. I have written a class object that looks for the leading transition of a bit constantly so as to circumvent this issue and it works well.

[@vigneshsankar8862]

Hi, Shane in my application I need to monitor the tag of about 5000 of data length 4byte is that possible using those libraries

[@ShaneWelcher]

Yes however, it may take a bit to collect all the data because of the way Python works. If you need a faster alternative then I would use JavaScript although it's a bit harder to implement

[@DuneKraftwerk]

​@ShaneWelcher what is the node js alternative you refer to ?

[@vishayinternet]

is it possible to change controller mode from Python e.g. Run mode to Programm mode?

[@ShaneWelcher]

Not from my knowledge, that is a safety risk in my opinion

[@kennythien2049]

Hi Shane, are you able to do a video on Modbus TCP/IP using python?

[@ShaneWelcher]

I do not have a modbus converter to use although yes you can read data from the IP address. Also depends on the modbus converter

[@lekanraji9899]

Which file do we need to download from github to do the same thing?

[@ShaneWelcher]

If you have python & an internet connection then open your CMD then run the pip install as shown of the pycomm3 GitHub page

[@Slap_it_in]

Why do my imported libraries never show up as purple?

[@ShaneWelcher]

Probably your setup, I use the full version

[@Slap_it_in]

@@ShaneWelcher It was the intellisense, also i believe there is a known issue with VS were it wasn't working. I moved to VSC and got familier with using that instead.

[@ShaneWelcher]

@@Slap_it_in Thanks for the reply

[@shraddhajadye8057]

Can we transfer the reading value of plc into excel file?

[@ShaneWelcher]

With extra code yes, I think you would have to add on the python script & make a small gui

[@shraddhajadye8057]

@@ShaneWelcher Thnank u....Above program is working for delta plc?

[@ShaneWelcher]

@@shraddhajadye8057 Rockwell Automation

[@abdulazizallahdan6546]

is there a way to connect to studio 5000 emulate?

[@ShaneWelcher]

I believe if you visit the GitHub, there is another source code for that. I haven't tried that one yet

[@abdulazizallahdan6546]

@@ShaneWelcher Will check it out! Thank you for reply!

[@fox9starshow]

thanks for your Idea.

[@renanamorim7525]

Thanks for the video! Is the PLC working as a Scanner or Adapter here?

[@ShaneWelcher]

I just attached a plc processor to the computer then ran Pycomm3

[@khachuytran3552]

Thanks you a lot, sir!

[@ShaneWelcher]

Glad to help

[@DuneKraftwerk]

I guess it cannot be used with RSLogix Emulate 5000 because the emulator cannot be accessed via an IP address.

[@ShaneWelcher]

You can use a Python script to read Emulator, however, it is a different code than this. Use the GitHub links in the video notes about how to do this.

[@dustin9480]

pylogix can read tags on emulate, I found out that emulate expects a specific connection size, because Rockwell. so if you add a line comm.ConnectionSize=504, it should connect to emulate as long as you are running your script on the same machine that emulate is running on. Edit: You would use your machines IP address to connect. edit2: I made a commit a while back that should automatically try the correct connection size for emulate if it doesn't connect the first time.

[@rezamagham4495]

Thank you very much indeed

[@ShaneWelcher]

You are very welcome

[@timkloehn9887]

I do not know python. I know c++, c# , and visual basic. Is it similar? I always wanted to try ingear software to work with allen bradley software because I know these languages. I bought a book on python, but I always read my C books because I work with robotics. C# is my favorite by far. Garbage collection is automatic, no memory leak.

[@ShaneWelcher]

Great to hear

[@timkloehn9887]

@@ShaneWelcher I don't know if you did a video on how to implement the encoder card on the powerflex 525. I have the board, just haven't used it yet.

[@ShaneWelcher]

@@timkloehn9887 I have an encoder card in my PF525, I'll try to make a video in the future. Been busy with moving & taking care of my mother.

[@timkloehn9887]

@@ShaneWelcher You were right about rs5000 version 20 being buggy and a piece of crap software version. I stand corrected. thankyou.

[@gbengaoyede2877]

Does it work with all types of plc or it's for a particular plc brand

[@ShaneWelcher]

The GitHub code I am using in this video is for Rockwell Automation. There are separate GitHub codes for other PLC brands

[@gbengaoyede2877]

@@ShaneWelcher isn't there any one that can be used generally? I am thinking of extracting real time csv data from plc since all plc(s) can do this, and reading it on python, i am actually making research on this and i could use your professionalism on this. Kindly share your me your email sir.

[@ShaneWelcher]

@@gbengaoyede2877 Visit the GitHub site for the information, it gets updated from time to time

[@MdMozammelHossain]

Hi, thanks for the video, I'm currently trying to use pycomm3 for real project, but what. Getting that very slow read cycle, it's taking around 0.9 sec to 1.3 sec just to for a read cycle. Which is very long in my application as hmi momentary switch only high for 0.5 sec, so it not catching singnal from hmi's push buttons. Is there any way to improve ? I have to read around 22 nos of integer register.

[@ShaneWelcher]

Please refer to the GitHub page for Pycomm3 It most likely could be your computer

[@MdMozammelHossain]

@@ShaneWelcher not sure if it's my computer, as I tried 3 computer, all of them have similar time, and also I tried ModbusTCP which has significantly less time, but because of some limitation of Modbus protocall, can't use it.

[@ShaneWelcher]

@@MdMozammelHossain Reach out to the creator of Pycomm3

[@DuneKraftwerk]

Indeed, polling data blindly is not the way, need to detect changes in values instead. I did change detection in c# but it must be a way to implement it on python or node js

[@Tescor_JC]

Is it possible to write PLC outputs?

[@ShaneWelcher]

Yes, just follow the GitHub directions. You are able to read or write

[@johntgilmore1]

I really enjoy your page, is there a ways I can share with you one I have created

[@ShaneWelcher]

Do not use my page to promote yourself

[@DuneKraftwerk]

Interesting. No OPC or MQTT involved.

[@ShaneWelcher]

Correct

[@edinetgrunhed6000]

Nice video,are you using visual studio for python?

[@ShaneWelcher]

I do use Visual Studio but in this video I used a separate VM which was Linux. I prefer Visual Studio 2019

[@edinetgrunhed6000]

@@ShaneWelcher in Visual studio what i remember there is toolbox like textbox or button, means you can use this for python reading display?

[@ShaneWelcher]

@@edinetgrunhed6000 yes, just import the tools needed to read data from the PLC . Pycomm is one tool then there is another tool I will show in the future. Using Visual Studio 2019 then install the needed things from GitHub & then when writing scripts, just import that tool first. If you did not have an internet connection for the install then there are ways to manually install as well but is a slight bit harder. The end result is the same. Using python to read data from a plc. Pycomm or Pylogix

[@edinetgrunhed6000]

@@ShaneWelcher ok,I prefer pylogix looks more stable

[@ShaneWelcher]

@@edinetgrunhed6000 Yes, more options

[@boodeepak]

Nice Video, How to store the data from an AB PLC into SQL server using Pycomm3

[@ShaneWelcher]

Seems like a very detailed topic that most people won't watch because of how long the video is. Your comment is very detailed to explain

[@cmrncrick]

use sqlite and create your own database