or writes execute fast enough to keep up with hardware timing. If a read or write executes late,
it returns a warning.
Note
DSA modules do not support HWTSP mode.
Analog Input Triggering Signal
A trigger is a signal that causes an action, such as starting or stopping the acquisition of data.
When you configure a trigger, you must decide how you want to produce the trigger and the
action you want the trigger to cause. The cRIO controller supports internal software triggering,
external digital triggering, analog triggering, and internal time triggering.
Three triggers are available: Start Trigger, Reference Trigger, and Pause Trigger. An analog or
digital signal can initiate these three trigger actions. C Series Parallel digital input modules and
the controller’s integrated PFI trigger line can be used in any controller slot to supply a digital
trigger. To find your module triggering options, refer to the documentation included with your
C Series modules. For more information about using digital modules for triggering, refer to the
Digital Input/Output with NI-DAQmx
,
, and
sections for more information about the analog input trigger signals.
Analog Input Timing Signals
The cRIO controller features the following analog input timing signals:
•
•
AI Sample Clock Timebase Signal
•
*
•
*
•
Signals with an * support digital filtering. Refer to the
section for more
information.
AI Convert Clock Signal Behavior For Analog Input Modules
section for more
information about AI Convert Clock signals and the cRIO controller.
AI Sample Clock Signal
A sample consists of one reading from each channel in the AI task. Sample Clock signals the
start of a sample of all analog input channels in the task. The sample clock can be generated
from external or internal sources as shown in the figure below.
NI cRIO-905x User Manual
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© National Instruments
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