MATH.CalcRootParable (FB)
(CAA_Mathematics.library)
By use of this function block the roots of a quadratic function 
(with 
), if there are some, are calculated.
Input:
|
lrParam2
|
LREAL
|
multiplier of  (corresponds to  )
|
|
lrParam1
|
LREAL
|
multiplier of  (corresponds to  )
|
|
lrParam0
|
LREAL
|
multiplier of  (corresponds to  )
|
Output:
|
byRoots
|
BYTE
|
number of roots (0, 1, 2 or 255 (in case of infinite number of roots))
|
|
lrRoot0
|
LREAL
|
first root (initialized with 0)
|
|
lrRoot1
|
LREAL
|
second root (initialized with 0)
|