Hi all,M Series boards do not support digital start triggers for digital I/O, but there are several ways to work around it as pointed out in the manual:M Series User Manual, page 6-3<a href="http://www.ni.com/pdf/manuals/371022j.pdf" target="_blank">
http://www.ni.com/pdf/manuals/371022j.pdf</a> Digital Waveform TriggeringM Series devices do not have an independent DI or DO Start Trigger for digital waveform acquisition or generation. To trigger a DI or DO operation, first select a signal to be the source of DI Sample Clock or DO Sample Clock. Then, generate a trigger that initiates pulses on the source signal. The method for generating this trigger depends on which signal is the source of DI Sample Clock or DO Sample Clock.For example, consider the case where you are using AI Sample Clock as the source of DI Sample Clock. To initiate pulses on AI Sample Clock (and therefore on DI Sample Clock), you use AI Start Trigger to trigger the start of an AI operation. The AI Start Trigger causes the M Series device to begin generating AI Sample clock pulses, which in turn generates DI Sample clock pulses, as shown in Figure 6-2.Similarly, if you are using AO Sample Clock as the source of DI Sample Clock, then AO Start Trigger initiates both AO and DI operations. If you are using a Counter output as the source of DI Sample Clock, the counter?s start trigger, enables the counter which drives DI Sample Clock. If you are using an external signal (such as PFI x) as the source for DI Sample Clock or DO Sample Clock, you must trigger that external signal.
