Справочник Пользователя для National Instruments NI PXI-1056

5.

Apply the chassis number labels (shown in Figure 2-6) included with 
your kit to each chassis in your PXI system, and write in the chassis 
number accordingly in the white space.

Figure 2-6.  Chassis Number Label

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 Apply button.

Some National Instruments chassis, such as the PXI-1045 and the 
PXI-1056, have the capability to route triggers from one bus to others 
within the same chassis using the Trigger Routing tab in MAX, as shown 
in Figure 2-5. This tab allows the routing of triggers from any single trigger 
bus to all of the other trigger buses in the chassis.