Synchronizing Two NI PCI-6602 Devices for Pulse GenerationPrimary Software: Driver Software>>NI-DAQPrimary Software Version: 4.6.1 Primary Software Fixed Version: N/A Secondary Software: LabVIEW Development Systems>>LabVIEW Professional Development System Hardware: Counter/Timers (TIO)>>Devices>>PCI-6602
Problem: How can I use the NI-DAQmx driver to synchronize pulse generation on two NI PCI-6602 devices? Solution: Refer to the NI-DAQmx Help for more information about synchronization. When you want to synchronize multiple devices, consider the following. Set the 20MHz timebase on the RTSI cable. The default timebase on the NI PCI-6602 is 80 MHz, and the RTSI cable does not support that timebase. In the DAQmx Channel property node parameters, select Counter Output»General Property»Counter Timebase»Source to transfer from the master device to the slave device. You must set one trigger source for all the counters. If your external trigger signal is a single pulse, you can wire the pulse onto a PFI line. Then, you can route the PFI line to a RTSI line and use the RTSI line as a trigger signal for the counters. However, if your external trigger signal is a periodic signal, you must use one counter on the master device as an external trigger signal to generate a single pulse. Then, you can route the CTR to a RTSI line. Refer to the attachment for an example. Related Links: KnowledgeBase 2QUB0D7N: Triggering Multiple Counters On the Same Board with a Single Pulse Attachments:  2cartes6602_full.vi
Report Date: 10/31/2008 Last Updated: 05/11/2009 Document ID: 4QUA7K5H |
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