Recently I was trying to communicate with a Siemens S7-1200 plc, I am using the OPC UA protocol, I am able to connect and read all the variables but I have problems when I try to write a value in the ...

I'm using Qt qtopcuaviewer example to test the connection to a PLC. Usually it works fine and I can retrieve the variables. With this specific PLC I get the following output: "Creating PKI path '...

I'm running the qtopcuaviewer example following these instructions to create the client certificate: # create a self-signed certificate and private key openssl req -new -x509 -config opcuaviewer.conf...

Now I have a package with a class that looks like this: class Opc(object): def __init__(self): client = Client("server_url") client.connect() opc = Opc() Now I want t...