Data Translation DT9837, User Manual

Page: 92 / 150

Chapter 6
92
The DT9837 Series Device Drivers provide support for the analog input (A/D) and analog
output (D/A) subsystems. For information on how to configure the device drivers, refer to
page 36 .
The tables in this chapter summarize the features available for use with the DT-Open Layers
for .NET Class Library and the DT9837 Series modules. The DT-Open Layers for .NET Class
Library provides properties that return support information for specified subsystem
capabilities.
The first row in each table lists the subsystem types. The first column in each table lists all
possible subsystem capabilities. A description of each capability is followed by the property
used to describe that capability in the DT-Open Layers for .NET Class Library.
Note: The following tables include the capabilities that can be queried. However, some
capabilities may not be supported by your device. Blank fields represent unsupported
options.
For more information, refer to the description of these properties in the DT-Open Layers for
.NET Class Library online help or
DT-Open Layers for .NET Class Library User’s Manual .
Table 3: DT9837 Series Subsystems
DT9837 Series Modules A/D D/A DIN DOUT C/T TACH QUAD
Total Subsystems on Module 1 1
a
or 2
b
a. The DT9837 supports D/A subsystem 0 to access the capabilities of the analog output subsystem.
The DT9837B supports D/A subsystem 0 to program the threshold value for the analog threshold
trigger, but the threshold level can also be programmed directly through the analog input
subsystem using software.
b. The DT9837A supports two D/A subsystem (0 and 1). Use D/A subsystem 0 to access the
capabilities of the analog output subsystem. D/A subsystem 1 is available to program the
threshold value for the analog threshold trigger, but the threshold level can also be programmed
directly through the analog input subsystem using software.
0 0 0 0
c
c. The DT9837 supports one tachometer input for measuring frequency or period. The DT9837A and
DT9837B support one tachometer input for measuring frequency or period and a gate input for
measuring phase. The DT9837C does not support a tachometer input.
You cannot use the DT-Open Layers for .NET Class Library to configure the tachometer or gate
input on the DT9837 Series modules. Instead, use the Open Layers Control Panel applet,
described on
page 36 , or write to the registers of the module, described on page 135 , to configure
the tachometer and/or gate input parameters.
You read the value of the tachometer and gate input signals through the A/D subsystem.
0