Why Does the Test Panel for My SCXI Module Seem So Slow? Primary Software: Utility Software>>Measurement & Automation ExplorerPrimary Software Version: 3.0 Primary Software Fixed Version: N/A Secondary Software: Driver Software>>NI-DAQ, Driver Software>>NI-DAQmx Hardware: SCXI>>Modules
Problem: I am trying to test an SCXI module, such as the SCXI-1531, in a MAX test panel. but it seems to read very slowly. Why is this occurring? Solution: The reason the test panel seems to read slowly may be because it is in strip chart mode (Traditional NI-DAQ) or On-Demand mode (NI-DAQmx). This mode acquires samples continuously at a software-determined rate, which means it has to reconfigure the module each time it takes a point. Because the SCXI-1531 (or SCXI-1530, 1520, or 1140/2/3) requires a few milliseconds to reconfigure its settings, a software timed acquisition is very slow. In order to test these modules, use the Continuous mode on the MAX test panel. This will allow scanning up to the maximum allowed acquisition rate of the module. See the related link below for information on how to calculate the maximum rate for your module. Related Links: KnowledgeBase 2K1BIKWD What Is the Maximum Achievable Scan Rate of the Simultaneous Sampling SCXI Modules? Attachments:
Report Date: 10/06/2003 Last Updated: 09/22/2004 Document ID: 3258M8MW |
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