Slave loop iterating only once

[silhalis]

Hello,

I kept googling my problem but nothing helpful came up so hopefully someone can help me here.

I am constructing a programme to read several DAQ inputs, display them on a chart (master, faster) and write them into a file (slave, slower). The displaying and the writing are supposed to happen at different frequencies.

I adapted the set up from this thread: https://forums.ni.com/t5/LabVIEW/time-synchronization-in-producer-consumer-loop/td-p/2439936.

My problem now is that the slave (writing) loop only iterates once and then never again. Since the example from the thread works just fine and I cannot find any significant difference I am hoping someone else can spot the difference.

I already tried adding a timeout value to the notifier but that didn't help. I also tried running it without the elapsed time component but the same problem occurs. Taking the timing out of the slave loop doesn't help as well.

I attach my vi but please don't be shocked, it is still in testing phase and by no means cleaned up yet.

[silhalis]

After some more testing I seem to have found the problem. The slave loop iterates first after that it doesn't get data from the notifier in time and therefore executes an error which stops the loop.

So the new question is how can set the slave loop to iterate after the master?

[silhalis · Accepted solution]

Solved it..

The actual problem was in the multiple Error handling and a faulty refnum constant from an earlier case structure.

Now.. How can I close or delete a topic?.. There seems to be no button for that.

[Ben]

The best you can do is mark the solution (which did in your behalf).

Ben

[billko]

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@silhalis wrote:

Solved it..

The actual problem was in the multiple Error handling and a faulty refnum constant from an earlier case structure.

Now.. How can I close or delete a topic?.. There seems to be no button for that.

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There is no such button.  People come here to learn and to learn from others.  How can they learn from your experience if you delete the topic?  (This forum wasn't created just for you.  ;))

[silhalis]

I understand that, but since there was no real discussion with different options and the solution was something completely off topic and actually unrelated to the master and slave design I thought I wouldn't really be helpful to others.

But maybe someone stumbles across a similar problem and this thread might give them new ideas to look for the error. 🙂

[billko]

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@silhalis wrote:

I understand that, but since there was no real discussion with different options and the solution was something completely off topic and actually unrelated to the master and slave design I thought I wouldn't really be helpful to others.

But maybe someone stumbles across a similar problem and this thread might give them new ideas to look for the error. 🙂

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🙂 You'd be surprised at how many people travel the same path and your solution, even if it seemed unrelated, solves their issue, too.