Serial Read Write Errors, How to Ignore

[maldrich]

Helllo All,

I'm trying to monitor up to 8 units via serial ports.  I do interrogate one port at a time.  My problem comes from this:

How do I keep a UUT dropout from interrupting my test for the other 7 units?  

I get a serial read error each time I interrogate a unit that has failed.  I still need to ping this unit to deterimine if it recovers.  I have automatic error handling turned off.  I try to just use the error cluster to catch the errors.  Unfortunately, on about the 3rd time a failed unit is interrogated, Labview pops up an error message that asks to continue or stop the execution.  

I've attached the printout of a serial read vi that I use extensively.  I also attached a jpg of an example sequence pane where its used.  

Thanks! 

[Albert.Geven]

Hi

I would open up all 8 ports and write to each of them.

Then I would always use bytes at port to check if already bytes have arrived at these ports.

If so I would issue the read command for that port, and get the data.

In this way no errors are necessary.

[maldrich]

Great!  Thanks for the advice.  I found some examples and I think this will solve my issues.  It will even give me a way to indicate an error condition.