PCIe/PXIe-6301 Series |
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4.4.2
Software Trigger
The anglog acquisition task will wait on the software trigger signal in the software
trigger mode until receiving a software trigger signal from driver, then AI task will start
to acquire the data.
4.4.3
External digital trigger
The module supports different external digital trigger sources from PXI Trigger bus
(PXI_TRIG<0..7>), PXI_STAR and connectors of front panel (PFI). The pulse width of
digital trigger signal must be longer then 20 ns for effective trigger. Thewill monitor
the signal on digital trigger source and wait for the rising edge or falling edge of digital
signal which depending on the set trigger condition, then enables the module to
acquire the data as shown in Figure 15.
Rising edge trigger
Falling edge trigger
Figure 15 Rising and falling edges of digital signals
Learn by Example 4.4.3
◼
Connect the PT100’s positive pole to AI+ (Pin#35), the negative poles to AI
- (Pin#1)
and Ex- (Pin#36
), then connect the signal source’s positive pole and negative pole
to PCIe/PXIe-6301 PFI2 (Pin#66) and GND (Pin#30);
◼
Set the signal source Ch1’s output to square wave (f=1Hz, Vpp=5v);
◼
Choose
Rising
in
Trigger Condition
and choose
PFI_2
in
Trigger Source
;
◼
Open
Winform AI Continuous Digital Trigger
, set the following parametersas
shown and click
Start.
