08-18-2022 11:43 AM
Hi,
I am trying to monitor 30 DIO lines of a PCI-6509. The current version of DAQmx (19.0) and LabView (2019) I am using do not seem to have an On Demand setting for the DAQmx timing VI that I have seen online. Is there another way in my current version of software to constantly monitor all 30 ports and relay their data within microseconds? Trying to see if this application is possible before going full steam ahead.
Thanks,
Joe
08-18-2022 05:04 PM
@josephrenk wrote:
Hi,
I am trying to monitor 30 DIO lines of a PCI-6509. The current version of DAQmx (19.0) and LabView (2019) I am using do not seem to have an On Demand setting for the DAQmx timing VI that I have seen online. Is there another way in my current version of software to constantly monitor all 30 ports and relay their data within microseconds? Trying to see if this application is possible before going full steam ahead.
Thanks,
Joe
In microseconds is impossible, as the processing time of the driver and windows os prioritization is in the order of ms.
For on-demand timing, you should not configure anything (don't ever use DAQmx timing API). Refer to the following example to continuously monitor DI channels using software timed reads.
Navigate to LabVIEW >> Help >> Find Examples
And navigate to the highlighted item