Measurement Computing DataShuttle - Manual (Page 75)

DataShuttle and DynaRes 11-12-01 Installing the ACAO 8-5
This number determines, among other things, the sequence in which the software reads multiple boards
(application programs can address as many as 15 boards).
When using more than one of our product in your installation, every board’s Board Number Switches need
to have a different number setting. All settings are to be in number sequence (1, 2, 3, for example, if you
are using three boards). Set the address and interrupt on all boards to the same settings
Single Board
If your system includes just a single data acquisition board, then you don’t need to be concerned with the
Board Number Switches.
When your ACAO leaves our manufacturing facility, the Board Number switches are set to 1. We
recommend this setting for most purposes when you are using only one board in your installation.
Disabling Board
If you want to disable the board, for any reason, set its Board Number Switches to 0. (This is handy if you
want to use fewer boards for a while: that way you don’t have to remove them from the computer.)
Setting the Switch
To Set the Board Number Switches
1. Locate the Switches With the cover of your computer removed, examine the illustration on page
8 – 2 in this chapter and find the “Board Number Switches” on the ACAO.
On the printed circuit board itself, these are located within a block of eight DIP switches; switches 5
through 8 represent the Board Number.
2. Make the Setting Note that the four switches have 16 possible setting combinations.
Determine which is to be the First Board. (This is easy, if it is the sole board.) Then set the switches for
Board Number 1. (See the table below for board number settings.)
The software interprets Board 1 to use system installation digital I/O channels 1- 8 and analog output
channels 1 through 8 (if it’s an ACAO-12-8), or system installation analog output channels 1 through 2 (if
it’s an ACAO-12-2).
Determine which is to be the Second Board, then set the switches for Board Number 2.
The program then recognizes Board 2 to use system installation digital I/O channels 9 - 16 and analog
output channels 9 to 16 (for an ACAO-12-8) or 3 - 4 (for an ACAO-12-2).
3. Set All Switches Continue to set the switches for all installed boards to unique numerical values in an
unbroken sequence.
(As various models of our boards use different kinds of switches, please see their owner’ s manuals for an
explanation of how to set switches.)