Panasonic FP Series

Arithmetic instructions
69
Part II IEC Instructions
SQRT
Square root
To add an enable input and enable output to the instruction, select [With EN/ENO] from the
"Instructions" pane (LD, FBD or IL editor). To reuse an instruction select "Recently used" from the
context menu or press <Ctrl>+<Shift>+<v> in the programming window.
PLC types
Availability of SQRT (see page 1331)
The number of steps may vary depending on the PLC and parameters used, see
also Table of Code Intensive Instructions in the online help.
Data type I/O Function
REAL input input value
REAL output as input square root of input value
No. IEC address Set If
R9007 %MX0.900.7 permanently
R9008 %MX0.900.8 for an instant
 input variable does not have the data
type REAL or input variable is not 
0.0
R900B %MX0.900.11 permanently  output variable is zero
R9009 %MX0.900.9 for an instant  processing result overflows the output
variable
This example uses variables. You can also use a constant for the input variable.
Description
SQRT calculates the square root of an input variable of the data type REAL (value  0.0). The
result is written into the output variable.
Data types
Error flags
Example
In this example, the same POU header is used for all programming languages. For an example
using IL (instruction list), please refer to the online help.
POU header
All input and output variables used for programming this function have been declared in the POU
header.
Body
The square root of input_value is calculated and written into output_value.
LD
ST
When programming with structured text, enter the following:
output_value:= SQRT(input_value);