Instant Digital Input Acquisition; Buffered Digital Input Acquisition - Advantech iDAQ-900 Series User Manual

3.5.2

Instant Digital Input Acquisition

With instant digital input acquisition, the software controls the sample timing. Each
time the software sends a "read instant digital input sample" command, the state of all
digital input channels is sampled as shown in Figure 3.26.
3.5.3

Buffered Digital Input Acquisition

With buffered digital input acquisition, the sample rate and the duration of the acquisi-
tion is controlled by hardware timing signals. All samples are stored in the buffer
memory before sending back to the host computer as shown in Figure 3.27.
iDAQ-900 User Manual
Figure 3.26 Instant digital input acquisition
Figure 3.27 Buffered digital input acquisition
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