Advanced Triggering Reference Example for CompactDAQ
PrintOverview
This VI demonstrates advanced triggering concepts using the CompactDAQ 9172 chassis. The VI was written to be used with a NI-9205 32-channel analog input module, a NI-9485 8-channel relay module in slot 5, and a NI-9265 4-channel analog output module in slot 6. The NI-9485 and NI-9265 are in slots 5 and 6 because they need to access the counters on the NI-9172.
**The accompanying code represents a very specific use case for NI products. For more general examples, please refer to ni.com/examples, the LabVIEW Example Finder, or the NI driver help files that come with every NI driver.
Downloads
Filename: cdaq_triggers_with_counters.vi
Requirements: View
What this example VI does: 1. ctr0 is set up to generate a pulse every second (1 Hz default). Each pulse of this counter will trigger current output on the NI-9265 (internal ctr0 output) which will also trigger a pulse on ctr1 so the current output and counter output are synchronized. 2. The ctr1 output will have a hardware-programmable delay (10 ms default) and we will use this counter to trigger the analog input, therefore obtaining a hardware-timed deterministic amount of time between the current output and voltage input. Note: line3 (pin 14) on the NI-9485 must be wired to PFI0 on the NI-9205 for this triggering to work. 3. Prior to the current output, we switch the relay on the NI-9485, thus multiplexing the signal. A common application for this sort of VI would be if the user would like to read the reflection off of multiple LEDs after a very specific amount of time.
Requirements
Filename: cdaq_triggers_with_counters.vi
Software Requirements
Application Software: LabVIEW Base Development System 8.2.1
Language(s): LabVIEW
Hardware Requirements
Hardware Group: CompactDAQ
Hardware Model: NI 9205, NI 9485, NI 9265
Driver: NI-DAQmx 8.5
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This example program (this "program") was developed by a National Instruments ("NI") Applications Engineer. Although technical support of this program may be made available by National Instruments, this program may not be completely tested and verified, and NI does not guarantee its quality in any way or that NI will continue to support this program with each new revision of related products and drivers. THIS EXAMPLE PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND AND SUBJECT TO CERTAIN RESTRICTIONS AS MORE SPECIFICALLY SET FORTH IN NI.COM'S TERMS OF USE (http://ni.com/legal/termsofuse/unitedstates/us/).