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Writing to a High Digital Line with the ELVIS Digital Writer Express VI Causes Glitch

Primary Software: Driver Software>>NI ELVIS Driver VIs
Primary Software Version: 2.1
Primary Software Fixed Version: N/A
Secondary Software: N/A
Hardware: Multifunction DAQ (MIO)>>Connector Blocks>>NI ELVIS

Problem:
When I use the ELVIS Digital Writer Express VI to write to a digital line that is already high, the line drops low before reaching the expected level. What can I do to change this behavior?

Solution:
When the Digital Writer Express VI is written to, the default behavior is to initially reset the output. To keep the VI from resetting before updating the line, run the VI in a While Loop with the stop condition of the loop wired to the stop terminal of the Digital Writer Express VI, as shown below.

Related Links:
KnowledgeBase 3X0ABPX6: Initial High Frequency Waveform When Using the NI-ELVIS Function Generator Express VI
KnowledgeBase 3X49ETX6: Changing the Value of the ELVIS Variable Power Supply Express VI Temporarily Sets Output to Zero


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Report Date: 05/05/2006
Last Updated: 05/12/2006
Document ID: 3X4DF8X6

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