# National Instruments PCI-6251 Analog Output

Analog Output block for PCI-6251, PCIe-6251, PXI-6251, and PXIe-6251 boards

## Library

Simulink® Real-Time™ Library for National Instruments®

## Scaling of Output to Input

I/O Module Output

Block Input Data Type

Scaling

Volts

Double

1

## Block Parameters

Channel vector

Enter 1 or 2. This driver allows the selection of individual D/A channels in arbitrary order. The number of elements defines the number of D/A channels used. For example, to use both of the analog output channels, enter

`[1,2]`

Number the channels begin with 1 even if this board manufacturer starts numbering the channels with 0.

Range vector

Enter a range code for each of the channels in the channel vector. The range vector must be the same length as the channel vector. This board allows the range of each channel to be different.

The following table is a list of the ranges for this driver and the corresponding range codes.

Input Range (V)

Range Code

-10 to +10

-10

-5 to +5

-5

${V}_{ref}×sig$, where $-1\le sig\le +1$

APFI0

For example, if the first channel is -10 to +10 volts and the second channel is -5 to +5 volts, enter

`[10,5]`
Reset vector

The reset vector controls the behavior of the channel at model termination. Enter a scalar or a vector that is the same length as the channel vector. If you specify a scalar value, that setting is replicated over the channel vector. If you specify a value of `1`, the corresponding channel is reset to the value specified in the initial value vector. If you specify a value of `0`, the channel remains at the last value attained while the model was running.

Initial value vector

The initial value vector contains the initial voltage values for the output channels. Enter a scalar or a vector that is the same length as the channel vector. If you specify a scalar value, that value is replicated as the initial value over the channel vector. The channels are set to the initial values between the time the model is downloaded and the time it is started.

Sample time

Enter the base sample time or a multiple of the base sample time (`-1` means sample time is inherited).

PCI slot (-1:autosearch)

If only one board of this type is in the target computer, enter `-1` to locate the board.

If two or more boards of this type are in the target computer, enter the bus number and the PCI slot number of the board associated with this driver block. Use the format `[BusNumber,SlotNumber]`.

To determine the bus number and the PCI slot number, type:

```tg = slrt; getPCIInfo(tg, 'installed')```