Advantech PCI-1716 User Manual page 35

Figure 3.8 Static (software-timed) analog output update.
The advantage of state update is low latency. It is typically used for writing a single
value of analog output.
When updating multiple analog output channels, they can be updated asynchro-
nously or synchronously. For asynchronous update, each the analog output channel
is updated immediately when the value to be updated is written to the device as
shown in Figure 3.9. For synchronous update, however, the values to be updated are
first stored in the device, and all analog output channels are updated synchronously
when the synchronous write command is sent. This is shown in Figure 3.10.
Figure 3.9 Analog output asynchronous update.
Figure 3.10 Analog output synchronous update.
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