© National Instruments | 2-15
PXIe-1095 User Manual
Trigger Configuration in MAX
PXI Platform Services provides an interface to route and reserve triggers so dynamic routing,
through drivers such as DAQmx, avoids double-driving and potentially damaging trigger lines.
For more information about routing and reserving PXI triggers, refer to KnowledgeBase
3TJDOND8 at
ni.com/support.
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.
NI recommends dynamic reservations and routing are used whenever possible. If static
reservations are required, 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.
Figure 2-9. Trigger Configuration in MAX
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