xPC Target    

CIO-DO24DD Digital Output

The CIO-DIO24DD has one 8255 chip with 3 ports (A,B,C). Each port has a maximum of 8 digital I/O lines that are configured as outputs.

Use a separate diver block for each port. By selecting the digital output driver block, the port is configured as output.

Scaling Input to Output

Hardware Output
 Block Input Data Type
 Scaling
TTL
 double
 < 0.5 = TTL low
> 0.5 = TTL high

Driver Block Parameters

Channel Vector - Enter numbers between 1 and 8 to select the digital output lines used with this port. This driver allows the selection of individual digital output lines in any order. The number of elements defines the number of digital lines used.

For example, to use all of the digital outputs for one port, enter

Number the lines beginning with 1 even if the board manufacture starts numbering the lines with 0.

Port - From the list choose either A, B, or C. The I/O board has a 8255 chip with 3 ports. The Port parameter defines which port of the 8255 chip is used for this driver block. Each port has a maximum or 8 digital lines that can be configured as inputs or outputs depending on which driver block is chosen. In each case, one block is needed for each port.

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

BaseAddress - Enter the base address of the board. This entry must corresponds to the DIP-switch settings on the board. For example, if the base address is 300 (hexadecimal), enter


 CIO-DO24DD CIO-PDISO16