Table of Contents
Advertisement
Chapter 2
Installation and Configuration
The PXI specification allows for many combinations of PXI chassis and system modules. To
assist system integrators, the manufacturers of PXI chassis and system modules must document
the capabilities of their products. PXI Express devices must provide a driver and
identification. These files are provided as part of the PXI Platform Services software included
with your system controller. The minimum documentation requirements for PXI-1 are contained
in
files, which consist of ASCII text. System integrators, configuration utilities,
.ini
and device drivers can use these
The capability documentation for a PXI-1 chassis is contained in a
by the chassis manufacturer. The information in this file is combined with information about the
system controller to create a single PXI-1 system initialization file called
(PXI System Initialization). The NI system controller uses MAX to generate the
file from the
chassis.ini
Device drivers and other utility software read the
obtain system information. For detailed information about initialization files, refer to the PXI
specification at
www.pxisa.org
Trigger Configuration in MAX
Each chassis has one or more trigger buses, each with eight lines numbered 0 through 7 that can
be reserved and routed statically or dynamically. Static reservation pre-allocates a trigger line
to prevent its configuration by a user program. Dynamic reservation/routing/deallocation is on
the fly within a user program based upon National Instruments APIs such as NI-DAQmx. Static
reservation of trigger lines can be implemented by the user in MAX through the Triggers tab.
Reserved trigger lines will not be used by PXI modules dynamically configured by programs
such as NI-DAQmx. This prevents the instruments from double-driving the trigger lines,
possibly damaging devices in the chassis. In the default configuration, trigger lines on each bus
are independent. For example, if trigger line 3 is asserted on trigger bus 0, by default it will not
be automatically asserted on any other trigger bus.
Complete the following steps to reserve these trigger lines in MAX.
1.
In the Configuration tree, click on the PXI chassis branch you want to configure.
2.
Then, in the right-hand pane, toward the bottom, click on the Triggers tab.
3.
Select which trigger lines you would like to statically reserve.
4.
Click the Save button.
2-16 | ni.com
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
files.
.ini
file.
pxiesys.ini
.
file for
.ini
file provided
chassis.ini
pxisys.ini
pxisys.ini
and
file to
pxisys.ini
Advertisement
Table of Contents
