I have a need to connect to an older OPC DA server which is v1 I believe, there are credentials setup to allow access to the server to read groups/items. However, the issue I am facing is that after trying a number of OPC DA clients, none seem to ask for any credentials upon connection or prior to connection being made.
I have tried the following applications
- Matrikon OPC
- Prosys OPC Client
- OPC DA Explorer
My main question here is, is this something that will need to be custom developed to connect and read the tags or are there other applications/clients out there we can use to aid this process?
I am open to a number of solutions, if anyone had/has similar issues I would love to hear what had to be done to overcome the problem. Unfortunately we are unable to upgrade to the newer OPC UA standard in this instance.
I have tried some applications in Python, Node.js and Node-Red but to no avail.
There is an extension to OPC DA called the OPC Security 1.0 specification. I have never seen it implemented though. OPC Security 1.0 Spec
In Matrikon OPC Explorer v5, when you click on an OPC server, I believe if it implements the OPC Security interface, you should be able to select the OPC server and then configure the security options.
Does your OPC client connect to the server at all? To you get back any error messages attempting to create groups or add items?