Community Documents
The Natt Sequence is a mini-pattern used for executing LabVIEW code sequentially. It has multiple benefits over other sequential code constructs (like the Flat Sequence, the Stacked Sequence, or the Sequence Loop), including:
- Self-documenting via the sequence enum
- No extra tooling required, just edit the sequence enum to add/remove/modify/rearrange sequence steps
- Code breakage when the case structure doesn't have frames for all steps defined in the sequence enum
- Minimal extra code
- Shift registers to share data between sequence steps
- Optional early break with For Loop conditional terminal
The Natt Sequence template VI and its supporting VIM can be used in LabVIEW 2017 SP1 and later.
Note: The Enum to Array of Enums.vim ships with LabVIEW 2020 and later and is available in Quick Drop/palettes.
(bit.ly/nattsequence redirects here)
Thanks for sharing Darren. I've seen variations on this over the years and I still think I prefer an array of string constant as the input. The reason is because I'll resize the array of string to show all of the elements, and then the sequence steps itself can be seen without having to click on the enum constant to see the values and order. This also allows for reusing of states, but to fair in such a simple piece of code I rarely use it for that.
Using the array of string constant does have the downside of losing the enum typing so it is possible to have a typo that goes to the default case. But honestly this doesn't happen very often. I usually find myself copying from the case to the constant or the reverse, and even if there is a typo it will be found quickly and not happen again. I mean it isn't some string manipulation creating it, it is just a constant so once its right you're good.
