Hello everyone,
I couldn't find an answer for my question, so I hope you can help me...
I am writing a control for a manufacturing mashine with LabVIEW. I am using an NI OPC server to read from and write data into the PLC of the mashine. When I change a specific variable, the mashine reacts instantaneously and the updated values are returned to the OPC server within < 1 s. Which is completely fine with me.
In the VI, I use a shared variable to display and write the data and despite the updated values in the OPC server, I observe a sever lag of up to a minute before the data from the OPC server is arriving at my VI.
However, I observe this only for some of the variables. Some show the updated values right away, others show a severe lag. When I change a lagging variable and afterwards a non-lagging variable, the lagging variable gets updated as soon as I change the other.
Do any of you have an idea what the reason might be for this problem?
A frustrated,
Qbach
Quick edit:
I am using LV 15.0 and NI OPC Server 2013.
