Need help with Siemens table statement.
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  1. #1
    Join Date
    Mar 2012
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    North Carolina
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    Question Need help with Siemens table statement.

    I have a new chilled water valve that i would like PPCL to display the flow for me. It is a flow controls PIV, and it came with a tag for flow at reference points. The only problem is the flow is not linear across the range of the valve. I have 10 reference points on the tag and I can only put 7 in a table statement. Here is my table

    degrees open GPM
    0 0
    10 1
    20 7
    30 17
    40 27
    50 41
    60 53
    70 63
    80 74
    90 75

    Here is a line of my code
    TABLE(HA08CV,HA08GP,0,0,10,1,30,17,50,41,70,63,80, 74,90,75)

    It is pretty close, but we are trying to optimize our chiller plant and data is critical. I would just like to be more acurate. I'm open to any suggestions for a better line of code.

  2. #2
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    North Carolina
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    hope someone can help?!?

  3. #3
    Join Date
    Jun 2009
    Location
    Iowa
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    42
    Quote Originally Posted by khumphreys View Post
    hope someone can help?!?
    Break it into 2 table statements

    IF (HA08CV .GE. 50.) THEN TABLE(HA08CV,HA08GP,50,41,60,53,70,63,80,74,90,75) ELSE TABLE(HA08CV,HA08GP,0,0,10,1,20,7,30,17,40,27)

  4. #4
    Join Date
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    Thanks a lot. Pretty new to PPCL but now that I see it, I should have thought of that. Not thinking logically.

  5. #5
    Join Date
    Jun 2009
    Location
    Iowa
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    Quote Originally Posted by khumphreys View Post
    Thanks a lot. Pretty new to PPCL but now that I see it, I should have thought of that. Not thinking logically.
    Speaking of logic, I missed one in the example. You will need to add the 50, 41 to the end of the last table statement, or you will not get readings between 40 and 50.

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