National Instruments FP-3000 - Manual (Page 66)

Chapter 4 Block Reference
FieldPoint FP-3000 User Manual 4-14 www.ni.com
User Functions
User functions are not supported. You cannot define sub-routines within an
expression block.
Purpose Scales the floating point value, valueToScale , to a
percentage in the scale range specified by engUnit0
and engUnit100 .
Return value The scaled floating point value status pair.
engUnit0 <= vs_float.value
returned.value <=engUnit100
Function Name to_unity
Function Syntax vs_float to_unity(float euValue,
float engUnit0,
float engUnit100)
Input engUnit0 is the low value of the scale range,
engUnit100 is the high value of the scale range,
and euValue is the value that needs to be converted
from engineering units to an implicit 0 to 1 scale.
EngUnit0 <= euValue <= engUnit100
Purpose Un-scales the floating point value input in euValue
parameter to a value using the scale range specified
by
engUnit0 and engUnit100 for the conversion.
Return value The floating point value status pair, with floating
point value being between 0 and 1.
0 <= vs_float_value returned.value <= 1
Function Name to_discrete
Function Syntax vs_discrete to_discrete(vs_float)
Input A symbol that is a value status float
Purpose Converts a value status floating point variable to a
discrete value status variable.
Return value A discrete value status record.