Which modes are available for analog inputs?
There are four available modes for analog inputs:
A. Simple mode
The software initiates and starts the A/D conversion and reads out the digital values of one or more channels after the end of conversion.
B. Sequence modes
With the DMA function (Direct Memory Access) for a direct data exchange with the PC memory
There are 2 sequence modes available:
1. Simple sequence mode
In this example the interrupt is generated at the end of each sequence after 5 acquisitions. The complete acquisition process ends after 3 sequences.
2. Sequence mode with delay
In this example the delay time between the end of one sequence and the start of the next sequence is 20 µs.
C. Auto refresh mode
The analog acquisition is initialised and the values of the channels are written in a buffer on an analog board. The PC reads the data asynchronously to the acquisition
D. Scan mode
There are 6 different scan modes:
1. Software single scan
The interrupt routine of the user is called up after the last IRQ.
2. Hardware triggered single scan
This scan can be triggered with increasing or decreasing edge. The hardware trigger allows to start the acquisition independently from the software or to start the acquisition of more than one board at the same time.
3. Continuous scan (software)
4. Continuous scan with timer delay (software)
5. Continuous scan (hardware)
6. Continuous scan with timer delay (hardware)