Owning Palette: Signal Manipulation Express VIs
Requires: Base Development System
Stores data from previous iterations of a loop and passes the data after the specified number of iterations occur.
| Dialog Box Options |
| Block Diagram Inputs |
| Block Diagram Outputs |
 Add to the block diagram |
 Find on the palette |
| Parameter | Description |
|---|---|
| History size | Contains the number of iterations of the loop to delay the packet of data. The default is 1. |
| Parameter | Description |
|---|---|
| Signals | Contains the input signal or signals. |
| Enable | Enables or disables the Express VI. The default is ON or TRUE. |
| error in | Describes error conditions that occur before this node runs. |
| Parameter | Description |
|---|---|
| Delayed Signals | Returns the delayed signal(s). |
| error out | Contains error information. This output provides standard error out functionality. |
The value you wire to History Size determines the number of times the loop iterates before the Express VI returns data. For example, if you enter 1 in History size, the Express VI does not return the data wired to the Signals input after the first iteration of the loop. The second time the loop iterates, the Express VI returns the value from the first iteration of the loop. The third time the loop iterates, the Express VI returns the value from the second iteration of the loop.