DM6420 Analog Input block
Simulink® Real-Time™ Library for Real Time Devices
Block Output Data Type
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
Number the channels beginning with 1 even if this board manufacturer starts numbering the channels with 0.
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
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.
Enter a range code for each of the channels entered in the channel vector. The range vector must be the same length as the channel vector. This driver allows a different range for each channel.
The following table is a list of the ranges for this driver and the corresponding range codes.
Input Range (V)
-10 to +10
-5 to +5
0 to +10
For example, if the first channel is -10 to + 10 volts and the second and fifth channels are –5 to +5 volts, enter
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.
Note: While this board has programmable input ranges of ±5, ±10 and 0 to 10, this driver sets the input range to +10, and then lets you select different input ranges by choosing different gains.
The following table is a list of the ranges for this driver given the gain entered in the gain vector.
-10 to 10
-5 to +5
-2.5 to 2.5
-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
Enter the base sample time or a multiple of the base sample
-1 means sample time is inherited).
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