how to exchange data between loops?

[falkpl]

don't worry if you dont get it to work at first well.  Concurrency is one of the most difficult problems in programming and software architecting.  At least Labview simplifies it compared to c++ threads.  Good luck.

[DFGray]

Shared variables have all the advantages and problems of globals and locals (a local shared variable is a global under the hood).  They were designed to allow easy data transfer between targets, not between loops.  I would recommend using queues.  Most other solutions will end up causing concurrency problems in all but the simplest situations.

[falkpl]

Thanks DFGray I havent played with shared variables yet I use queues extensivly and love them.  I thought that shared variables vere more a kin to queues than globals but I guess not.  Thanks.

Paul 

[altenbach]

To be fair, unlike local and globals, shared variables at least have error in/out terminals. 😄

This means that execution order can be made slightly more predictable without having to resort to sequences IF the error clusters are used.