For this client, we’re using an Ignition gateway to read OPC tags from an instance of KEPserverEX connected to field devices. They’re upgrading from WW, so they have only devices and channels set up in KEPware, with no tags. Their old software hit PLC addresses directly using addresses like “Device.channel.V6644”. Is this possible with Ignition? In other words, can Ignition read a device through an OPC Server without a corresponding OPC tag?
You can read it from scripting (
system.opc.readValues) without creating a tag first.
Otherwise, you can manually create OPC tags, and just type in the corresponding OPC Item Path, which will be the same value you’d use in the scripting call.