Documentation

Real Time Devices DM6430 Analog Input (A/D)

DM6430 Analog Input block

Library

Simulink® Real-Time™ Library for Real Time Devices

Scaling Input to Output

Hardware Input

Block Output Data Type

Scaling

Volts

Double

1

Block Parameters

Channel vector

Enter numbers between 1 and 16. This driver allows the selection of individual A/D channels in arbitrary order. The number of elements defines the number of A/D channels used.

For example, to use the first, second and fifth channels, enter

[1,2,5]

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

Gain vector

Enter 1, 2, 4, or 8 for each of the channels in the channel vector to choose the gain code of that channel. The gain vector must be the same length as the channel vector. This driver allows the gain of each channel to be different.

The following table is a list of the ranges for this driver given the gain entered in the gain vector.

Gain

Range (V)

1

-10 to 10

2

-5 to +5

4

-2.5 to 2.5

8

-1.25 to 1.25

Notice that by increasing the gain code the voltage range is decreased. The gain divides the input voltage range.

For example, if the first channel has a gain code of 1 (10 volt range) and the second and fifth channels have a gain code of 2 (5 volt range), enter

[1,2,2]
Input coupling vector

Enter either 1 (single-ended) or 2 (differential) for each of the channels in the channel vector to choose the coupling code. The coupling vector must be the same length as the channel vector. This driver allows the coupling of each channel to be different.

For example, if the first and second channels are single-ended and the fifth channel is a differential input, enter

[1,1,2]

The driver selects a second differential input 8 channels higher than the first channel. In the example above, the driver would select the thirteenth channel as a differential input with the fifth channel.

Sample time

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

Base address

Enter the base address of the board. This entry must correspond to the DIP switch setting on the board. For example, if the DIP switch setting is 300 (hexadecimal), enter 0x300.

External Websites

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