F333_FINT

The function rounds down the decimal part of the real number data and returns it at output d.

Parameters

Input

s (REAL)

source

Output

d (REAL)

destination

Remarks

• Instead of using this F instruction, we recommend using the corresponding FP7 instruction: FP_ROUND_DOWN

• The converted whole-number value at output d is always less than or equal to the floating-point value at input s:

  • If a positive floating-point value is at the input, a positive pre-decimal point value is returned at the output.

  • If a negative floating-point value is at the input, the next smallest pre-decimal point value is returned at the output.

  • If the negative floating-point value has only zeros after the decimal point, its pre-decimal point position is returned.

Error flags

sys_bIsOperationErrorHold (turns to TRUE and remains TRUE)

if the value at input s is not a number of the data type REAL.

sys_bIsOperationErrorNonHold (turns to TRUE for one scan)

if the value at input s is not a number of the data type REAL.

sys_bIsEqual (turns to TRUE and remains TRUE)

if the calculated result is 0.

sys_bIsCarry (turns to TRUE for one scan)

if the result causes an overflow.