python opc

OPC (OLE for Process Control) is a set of standards and specifications for industrial automation and control systems. It stands for Object Linking and Embedding (OLE) for Process Control. OPC allows different software applications to communicate with each other and exchange data in real-time.

In Python, you can utilize OPC functionality using libraries such as "pyOPC" or "pyOPC-UA" to connect to OPC servers, read data from tags, write data to tags, and perform other operations. These libraries provide an interface to interact with OPC servers using Python code.

Here is an example of how you can use the "pyOPC-UA" library to connect to an OPC server and read a tag:

from opcua import Client

url = "opc.tcp://localhost:4840"  # OPC server URL
client = Client(url)

try:
    client.connect()  # Connect to the OPC server
    node = client.get_node("ns=2;s=MyTag")  # Get the node representing the tag you want to read
    value = node.get_value()  # Read the value of the tag
    print("Tag value:", value)
finally:
    client.disconnect()  # Disconnect from the OPC server

Please note that the specific implementation details may vary depending on the OPC library you choose and the OPC server you are working with. Also, make sure to install the required library using pip before running the code.