I currently have 2 connection paths to develop my ignition project:
- I originally used the Ignition OPC-UA Server and connected to my PLC
- I later used the FactoryTalk Linx Gateway to connect to an Emulated PLC (Studio 5000 Logix Emulate)
I have the connection to both up and running fine. and they both contain exactly the same tags. My reason for doing this is because sometimes I work in the office with a PLC on hand and sometimes I work remotely without a PLC available.
Basically I would like to switch all of my ignition project tags from using the Ignition OPC-UA Server to using the FactoryTalk Linx Gateway OPC-UA Server at will.
What is currently working:
I figured I could do this by specifying 2 Data Type Parameters for each of my UDTs: 1 called “ServerName” and 1 called “ns_number”.
I would then pass in the strings “Ignition OPC-UA Server” and “1” for my respective parameters if I wanted to use the Ignition OPC-UA server OR I would pass in “FactoryTalkLinxServer” and “3” for my respective parameters if using the FactoryTalk Linx Gateway.
This also works fine.
My issue is that in the Data Type Parameters section, I would like to add a Memory tag into the value section. This way I can write to the memory tag via a Gateway Event Script and change all my tags from 1 OPC Server to another. However, the Data Type Parameter values section does not accept my memory tag.
Is there a better way to go about this switch?
I could also export the Tag xml file, find and replace all the OPC server and ns_number instances but this seems hokey.