Emerson Exchange 365

Use STATUS parameter of I/O cards in Calc Block

Hello Everyone,

Im having some trouble trying to use the STATUS parameter of the I/O cards. What I want to be able to do is check the status of my I/O cards and return as output a integer value depending on the diferent STATUS values.

I try using the SELSTR command but it didnt work, it is returning always a zero. Here is the code I put in my CALC block:

'OUT1.CV' := SELSTR('//330-PC-101/IO1/C01/STATUS.CV',"Good","No Card","","","");

Thank you for your time and help

• DeltaV

AlejandroQuiroga

• 4 Aug 2020 1:59 PM
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4 Replies

• vmvmhatre

  

  • 4 Aug 2020 3:44 PM

  I/O Card/STATUS parameter returns "Text description of the current condition of the card" as per BOL.
  
  Function SELSTR (x,a,b,c,d,e) expects x as numeric.
  
  A logic should be written to convert text value to integer value.

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• Lun.Raznik

  

  • 4 Aug 2020 4:09 PM

  If seems like you have inverted the functionality of SELSTR. SELSTR returns the string corresponding to the parameter. For example:

  //MOD1/PARAM1.CV	Return
  1	Good
  2	Bad
  3	Not defined

  is this something that you might wanted to do?

  IF '//CTLR-1/IO1/C01/STATUS.CV' = "Good" THEN
  OUT1 := 1;
  ELSE
  IF '//CTLR-1/IO1/C01/STATUS.CV' = "No Card" THEN
  OUT1 := 2;
  ENDIF;
  ENDIF;

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• AlejandroQuiroga

  

  • 4 Aug 2020 4:17 PM

  In reply to Lun.Raznik:

  Yes that is exactly what I want to do Thank you for your help

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• AlejandroQuiroga

  

  • 4 Aug 2020 4:18 PM

  In reply to vmvmhatre:

  Ohh thanks, you are right I was not using in the right way the command.

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