XL15C Configuration

Configuring Excel 15C MathFunction

The Excel15C controller supports two types of Math function - General Purpose and Network Special. The MathFunction object is used to configure a general purpose math function.

TThe EXCEL 15C supports 30 General Purpose Math functions. Each General Purpose math function operates on up to 6 floating point analog inputs. The result is a floating point analog value. Inputs can be a physical or remote point value, set point, output of a flex or logic loop, or output of a math function. The result can be used by any flexible or logic loop or math function.

General Purpose Math functions are used to perform operations like minimum, maximum, average, square root etc. on up to 6 floating point analog values available within the controller.

Procedure

  1. Drag a MathFunction object from the palette and drop it on the wiresheet.
  2. Right click and invoke "Config" menu option.
  3. Select the type of function for each of the operation.
  4. Select "Minimum" operator to have an Output = Minimum (A1,A2,A3,A4,A5,A6).
  5. Select "Maximum" operator to have an Output = Maximum (A1,A2,A3,A4,A5,A6).
  6. Select "Average" operator to have an Output = Average (A1,A2,A3,A4,A5,A6).
  7. Select "Square Root" operator to have Output = Square Root (A1) (If A1 is negative, it is converted to positive, then square rooted).
  8. Select "Add" operator to have an Output = A1+ A2+ A3+ A4+ A5+ A6
  9. Select "Subtract" operator to have an Output = A1- A2- A3- A4- A5- A6
  10. Select "Multiply" operator to have an Output = A1* A2* A3* A4* A5* A6
  11. Select "Divide" operator to have an Output = A1/ A2/ A3/ A4/ A5/ A6
  12. Select "Enthalpy" operator to have an Output (BTU/Lb) = Enthalpy ( A1=temp, A2=RH )
  13. Create a link between any analog input (Analog Link of Analog Input1) and the MathFunction (Input1 Link) through the Link dialog.
  14. The input can also be created through a PollPoint object, RemoteAI object etc...

Note:

Any change in the configuration needs to be downloaded to the controller. Until then, the objects would be marked as "Stale".This is an indication that these changes need to be downloaded to the controller.Invoke "Download" to download the configuration changes to the controller.

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