Difference between Shift Register and Feedback Node

[Thad House]

Our team uses while loops with shift registers to run all of our inputs and outputs. Inside each loop is a case structure with an enum for 3 modes, which are init, run and end. All the code that would normally be placed in the begin VI is placed in the init case, and then that case is run in begin. In run is all of our code that is used at runtime. In end it the code that is normally located in finish. This shift registers are used to transfer the references between the 3 states. This means that we do not need to use refnums which saves some resources.

[SuperS_5]

Originally Posted by sst.thad

Inside each loop is a case structure with an enum for 3 modes, which are init, run and end.

Just be careful with Enums like this. This is very common practice BTW, and one method to keep your code isolated. Your action Enum, (Init|work|end) should always be a TypeDefd control. This also presents the possibility of the constant value automatically changing if the typedef is updated. I typically will write the desired value as a BD note, next to the Enum constant.