RTOI – Real to integer number conversion

Block SymbolLicensing group: STANDARD

Function Description
The RTOI block converts the real number r to a signed integer number i. The resulting rounded value is defined by:

i : = \{\begin{matrix} - 2147483648 & for & r \leq - 2147483648.0 \\ round (r) & for & - 2147483648.0 < r \leq 2147483647.0, \\ 2147483647 & for & r > 2147483647.0 \end{matrix}

where $round$ (r) stands for rounding to the nearest integer number. The number of the form $n$ +0.5 ( $n$ is integer) is rounded to the integer number with the higher absolute value, i.e. $round (1.5) = 2$ , $round (- 2.5) = - 3$ .

Note that the numbers $- 2147483648$ and $2147483647$ correspond with the lowest and the highest signed number representable in 32-bit format respectively (0x7FFFFFFF and 0x80000000 in hexadecimal form in the C language). This limits are valid if the vtype parameter has default value. Limits of selected data type is applied in other cases.

Input

r	Analog input of the block	Double (F64)

Parameters

vtype	Output numeric type $⊙$ 4	Long (I32)
	–- ... 2 .... Byte (U8) 3 .... Short (I16) 4 .... Long (I32) 5 .... Word (U16) 6 .... DWord (U32) –- ... –- ... –- ... 10 ... Large (I64)
SAT	Saturation (overflow) checking $⊙$ on	Bool

Output

i	Rounded and converted input signal	Long (I32)

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