PCIM-DDA06/16 User's Guide
Installing the PCIM-DDA06/16
7
Set the jumper to
XFER
to update the DAC voltage outputs as a group.
New output data is held until all DACs are loaded with their new digital data.
The data for each DAC is simultaneously transferred and the DAC voltage outputs are updated as a group
when any of the addresses BADR3 + 0 to BADR3 + B are read. Writing new digital values to the DAC
control register does not cause an update of the DAC's voltage output. Update of the output occurs only
after the DAC control register address (any of the addresses BADR3 + 0 to BADR3 + B) is read
In this way, the PCIM-DDA06/16 can be set to hold new values until all channels are loaded, then update
all six channels simultaneously. This is a very useful feature for multi-axis motor control.
Set the jumper to
UPDATE
to update the DAC voltage outputs individually.
The analog outputs are controlled by writing a digital control word as two bytes to the DAC's control
register. The control register is double-buffered, so the DAC output is not updated until both bytes (first
low byte, then high byte) are written to the DAC control register when the simultaneous transfer jumper is
in the default
UPDATE
position.
Analog output range switch
You set the analog output voltage range of each with a five-position DIP switch. The switches are located on the
board directly above the DACs and are labeled
CH5
through
CH0
(
S6
through
S1
). Bipolar ranges are ±10 V
and ±5 V. Unipolar ranges are 0 to 10 V and 0 to 5 V.
Figure 3 lists the range value and associated settings for each switch.
Figure 3. Analog output range switch—one per DAC
To set a channel to a particular range, read the switch positions as
U
(up) or
D
(down) from left to right in the
row beside the range you want to set.
Installing the hardware
Install the MCC DAQ software before you install your board
The driver needed to run your board is installed with the MCC DAQ software. Therefore, you need to install the
MCC DAQ software before you install your board. Refer to the
Quick Start Guide
for instructions on installing
the software.
After you configure the board's switches and jumpers, install the PCIM-DDA06/16 into your computer. Perform
the following steps to install the board:
1.
Turn your computer off, open it up, and insert your board into an available PCI slot.
2.
Close your computer and turn it on.
When connected for the first time, a
Found New Hardware
dialog opens when the operating system detects
the device. When the dialog closes, the installation is complete. If you have not installed the MCC DAQ
software, cancel the dialog and install it now.
3.
To test your installation and configure your board, run the InstaCal utility installed in the previous section.
Refer to the
Quick Start Guide
that came with your board for information on how to initially set up and
load InstaCal.