How does reading of alarms work

[jogibear9988]

Hello Thomas,

I've one more question, about how does reading of Alarms work.

I see this: TestWaitForAlarmNotifications, wich uses WaitForNewS7plusReceived(waitTimeout);

How does this work. What about I want to use the same connection to read Tags and Alarms?
As I see the Lib could not be used with multiple Threads, as WaitForNewS7plusReceived does not wait for a specific answer, it only returns the next one.

Or does the protocol at all not support multiple actions at once?

[thomas-v2]

It's for now only a testfunction to analyze how it works. I think it would be clearer to do all alarm relevant communication on a separate connection. If I remember correctly, that's also the way Siemens handles this in their software. They use one connection for variable access, one for events, and start an optional 3rd for exploring. I don't think this is a "must", but if something major in the event task goes wrong, you can just restart this session and keep the variable flow working.