In your FPGA VI, create an array Control, Constant, or Indicator.Right-click on the Index Display or the border of the array, and choose Set Size... The following dialog box will appear:
There are two options:
For array indicators, the same options are available, and a checkbox above selects between using the default Adapt to Source Wire behavior or one of the behaviors listed above.
Arrays are always defined in terms of specified dimensions in FPGA, because it requires pre-allocated arrays and does not support dynamic memory allocation. FPGA VIs only support one-dimensional arrays that resolved to a fixed-size at compile time. To make this more transparent, you can restrict the size of arrays for FPGA targets.
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