I am using the OPC-UA Server on board a Siemens S7-1500 rather than the inbuilt Ignition Server as it supports OPC browsing and doesn’t require addressing etc. I am using v7.9.6 of ignition.
Generally it works however it does fault when pushed.
The problem doesn’t appear to be loading of tags but rather the rate of loading. For example I can get all the tags to read if I import them slowly. However if I import them too quickly or I restart ignition or the PLC (such that all the requests come at once) the connection faults with the messages attached (chunk count exceeded). I cannot then re-establish comms until I restart the OPC server (PLC) and load the tags in at a slow rate.
Is this a problem with ignition or the OPC Serve? i.e. is the chunk count error being raised by ignition’s OPC Client or being passed back from the OPC Server? I have attached the log below.
I’m concerned this may be an insurmountable problem for our project and that I might need to use the S7 driver built into the Ignition OPC-UA Server.
I’ve got a sevrvice ticket for this but any help would be most useful.