Відео

new_value = 53.0 variant_value = ua.Variant(new_value, ua.VariantType.Float) node.set_value(variant_value)

I do not know really, I do not have any experience with CPU ET200SP, but if it supports PUT/GET it might be possible

@@nelsonpereira1932 looks like OpenPLC supports Modbus TCP so I believe it should be possible.

@@wvvwwwvvw I haven’t used Ignition as developer yet but from what I heard it is user friendly and has a lot of capabilities. I have used it as an end user and I personally liked it.

You can join our discord community, it would be easier to help you there. Without any screens it is quite difficult to know what is wrong.

Hi! I have personally not done it, but maybe this link helps: opcfoundation.org/forum/opc-ua-implementation-stacks-tools-and-samples/opc-ua-client-sample-with-signandencrypt-basic256sha256-certificate/ You can also join our discord and ask there, maybe someone knows.

@@plcwars, thanks for your reply. I will look at it.

Hi @plcwars, how about via api to connect to an OPC UA server? Have your tried it? Thanks.

@@LinoJr.Asmolo unfortunately I have not used it

@@plcwars , okay. Thanks.

Hi, thank you! This is just an instance of the plc. It means basically that you have to create a simulation of the PLC. This is a simulated PLC device. If you just type a name there and select start it should work. If you need more help you can join the discord server and you should get more detailed support there.

thank you@@plcwars

you can contact me here: plcwarsyt@gmail.com

thanks! unfortunately, I do not have access to the siemens logo

What do you mean by that? I did not do it again?

Hi @merveuzun4612 full code is here in branch "step2" github.com/Mareh07/plcwars-pickandplace/tree/step2

@@plcwars thank you so muchh

Were you able to solve it, currently having the same problem

I'm not very well versed in Python however there are multiple path you could take: - A loop (basic but lack flexibility) - same loop but in a thread so it doesn't prevent the rest of the from working (however you have to be careful) - Event based system (no clue how one would do that in python) (maybe the Queue package could help) - Scheduler (never tried) It depend on what you want to do. Maybe there is a way to something better using python or the automaton Edit: Added some options

as mentioned above I would try with task scheduler to run a script, on linux based systems equivalent would be cron task

Hi Metehan, you could have a wrong data type defined so you would overwrite more values than you intend to, as an example you would like to change one boolean but you try to write int then you will overwrite more than one bool. I am not sure what exactly is the problem, so the values that you read from opc ua are different than the ones online in the plc? I came up with an idea of creating a discord channel so it would be easier to help in such cases: discord.gg/kU3g94rNXx

Hi Mahmoud, I believe you should be able to.

Hi Mehdi, this is not what Python Snap7 is for, so you are not able to write plc program using it.

Hi! What message do you get back exactly in the terminal? Did you try to copy it and search in the google? This could be helpful.

run "app" inside folder "opcua-client-gui-master"

Hi Wolfeer, please have a look at my first video for snap7, ua-cam.com/video/xSTfmCdepyw/v-deo.html from 0:25. Optimized block access property should be off and PUT/GET must be enabled. Also CPU access protection should be set to full.

def WriteMemoryChar(start_address, length, value): writing = plc.mb_write(start_address, length, bytearray(value.encode('utf-8'))) print(writing) print('Start Address: ' + str(start_address) + ' Value: ' + value) ............ charlength = 10 chars = 'HelloWorld' ChartStartAddress = 104 for i in range(charlength): char = chars[i] WriteMemoryChar(ChartStartAddress + i, 1, char) ............... In TIAPortal create smt function for moving CHARs from memory to STRING in DB.. ............... Youre welcome :)

I acn tell you how to write string send me an email

Hi! thanks for your feedback! There could be several reasons, did you check if "optimized block access" property is turned off? Is the PUT/GET enabled? Access level should be set to full. You can have a look in the following links for some more description. stackoverflow.com/questions/47979438/s7-1200-snap7-exception-cli-function-refused-by-cpu-unknown-error sourceforge.net/p/snap7/discussion/general/thread/c9ec5278/ I hope you will find your issue. Please let me know how it goes! ;)

Hi, I believe that for the downloading plc program you need dedicated software which in this case will be TIA Portal.

Hi! Thanks for your feedback. OPC UA is industrial standard for data exchange. (en.wikipedia.org/wiki/OPC_Unified_Architecture) Snap7 is something to interface directly with the S7 communication protocol which Siemens uses in theirs PLCs. (snap7.sourceforge.net/) I am not familiar with Beckhoff and ADS so I am not able to compare it and tell you if it is something similar.

Hi Tin, you can contact me on this email: plcwarsyt@gmail.com

i can do it the same on s7 1200?

Hi reza, I never had opportunity to work with scada pack so I am not sure if it is possible.