Contec AI-1604CI2-PCI, Руководство пользователя

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4. Functions
54
AI-1604CI2-PCI
Data acquisition
The conversion data stored in memory can be retrieved using a software command.
The figure below shows the correspondence between the sampling count and the conversion channel for
the conversion data stored in memory.
Input data is acquired differently depending on the memory format used.
- Data acquisition in FIFO format
When FIFO memory is used, the oldest data is always read first.
The following sketch shows an image of data acquisition in FIFO format.
When data is acquired from the memory, the free memory space increases by that data size. When
data is acquired next, the oldest one of the existing data items is taken from the memory in the same
way.
The FIFO memory deletes data once that data is acquired.