17 |
Attention
The length of the number of waveform points cannot exceed
2048 points.
When the number of waveform cycles is set to bit 0, the
acquisition device will always output the waveform
cyclically.
Finite length waveform output
Limited-length waveform output means that the computer first sends the specified length
of waveform points to the acquisition device. When DO acquisition is triggered, the
acquisition device starts to output waveforms according to the set sampling speed. When
the output waveform cycle number reaches the set cycle number, the acquisition device
automatically stops outputting.
Infinite loop waveform output
Unlimited waveform output refers to the output of waveforms of infinite length. At this
time, the computer is required to send the latest waveform points to the acquisition device
at the set speed, and the acquisition device will output the latest waveform points at the set
sampling speed. Please refer to the response routine for details.
3.3.
Trigger
PCI-1232 data acquisition device provides two trigger options, and the schematic diagram
of DO acquisition trigger options is shown in figure 4.2.
DoSoftTrig software trigger
Globa software trigger
DO trigger signal
Figure 4.2 DO trigger options
DoSoftTrig software trigger is used as trigger source for DO acquisition by default, and
other trigger sources can be used for DO acquisition through software settings to achieve
the function of synchronization of various functions.
DoSoftTrig software trigger and global software trigger are both software triggers, which
can be triggered by sending a command from the computer to the acquisition device.
Clear trigger
Trigger status can be reset to an untriggered state via software settings.
