General Standards PMC-ADADIO Analog Input (A/D) Read - PMC-ADADIO Analog Input Read block

Library

xPC Target Library for General Standards

Scaling Input to Output

Hardware Input	Block Output Data Type	Scaling
Volts	Double	1

Note

The values passed to the enable input port and enable output port of this block are Boolean values.

Block Parameters

Number of channels

Enter a scalar between 1 and 8 to select the number of channels from which to acquire data. This board always acquires data from the channels in chronological order with no random access to channel selection. For example, if you enter 3, data is acquired from channels 1, 2 and 3. Select a number between 1 and 8 even though the hardware manual numbers the channels from 0 to 7.

Range option

From the list, select +-10V, +-5V or +-2.5V as the input voltage range of the board. You must select the range that corresponds to the factory configured input range. Consult the board's documentation to determine the voltage range of your board. The xPC Target software uses this parameter to convert the data to floating point numbers.

Input coupling

From the list, select Single-ended (8 channels) or Differential (8 channels). See the board's hardware manual for information on how to wire the board for these configurations.

Autocalibration

The PMC-ADADIO can check its own calibration (autocalibration) against an internal voltage reference. Choose this check box to execute the autocalibration cycle when the model is downloaded to the target computer. The output ports show a square wave during the cycle. Unless you subject this board to harsh conditions, you should only need to run autocalibration occasionally—for example, once a month.

Note   The calibration cycle takes several seconds to run. Refer to the PMC-ADADIO documentation for further information on autocalibration.

Enable input port

Select this check box to display an input port that controls writing data from the A/D ports on the hardware. If the enable input signal is true, then the output of the A/D converter is read and output to the block output port. If the enable input signal is false, then zero data is output to the block output port. If this check box is not selected, then the enable input signal is assumed to be true.

Enable output port

Select this check box to pass the Boolean value from the input enable port to the output enable port. You can connect this port to the input enable port on another block to control other blocks in the model and specify execution ordering.

Sample time

Enter the base sample time or a multiple of the base sample time.

PCI Slot (-1:autosearch)

If only one board of this type is in the target computer, enter

-1 

to automatically 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

getxpcpci

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