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BeeEyeBye

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Posts posted by BeeEyeBye

  1.           Hello.  Is there a way to automatically control a Numeric Control with the Units Label?  My experiments show it has a good manual affect when I change the units from nS to mS to S, hiding or showing the 3 lsd.  I need this to happen automatically when the user scrolls the number.  I need to limit a numeric control window to the 3 most significant digits no matter how large the number is by incrementing the unit label through nS, mS and S.  Is there a way to use the text property node for Unit Label for this?

              There seems to be conflicting information.  NI says it is possible here  https://www.ni.com/docs/en-US/bundle/labview/page/lvhowto/numeric_units.html

    "You also can use the Text property to change units programmatically. The Unit Label property creates a reference that you can use with the Text properties."

    But when I try it an error message appears telling me that changing this property isn't allowed while the VI is running.  What am I missing?  Thanks for any help you can give.

  2. Rolf,

    Thanks for your help.  I switched the Master Holding Register Read to a Master Input Register Read but still get nothing.  The slave doesn't seem to care about the unit id.  Qmodmaster returns data whether the unit id is 0, 1 or 2.  Address hex 100 works well for Qmodmaster so I used 256 decimal in Labview.  Tried 100 hex also, just in case.  I'm wondering if Labview is finding its way out of the computer at all.  There are no messages and no data.  The register value window is greyed out.  The DATA TYPE tab is greyed out on the Properties window.  Any thoughts?  Thanks for your help.

     

  3.           I'm trying to read six input registers from a remote device but the software I put together doesn't seem to do much; no errors but no read-backs either.  I'm a beginner, so the answer is probably simple.  The remote device input registers start at 200 hex.  The device uses TCP and the IP address is correct.  My computer communicates well with the remote device through QmodMaster.  Any help you could give would be appreciated.  Thanks, Mike.

     

     

    Modbus Read 01.pdf So far 01.vi

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