Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 820

Processing details
• These instructions calculate the square root of the value specified by (s), and store the operation result in the device
specified by (d).
(s)+3 (s)+2 (s)+1
Double-precision real number
• The value specified by (s) must be positive. (No negative value can be calculated.)
• If the operation result is -0 or an underflow occurs, the operation result turns out to 0.
• When an input value is set using the engineering tool, a rounding error may occur. Refer to the following for the precautions
on setting input values using the engineering tool.
Page 49 Precautions
Operation error
Error code Description
(SD0)
The value input to (s) is -0, a subnormal number, NaN (not a number), or .
3402H
3405H The value in the device specified by (s) is a negative number.
7 APPLICATION INSTRUCTIONS
818
7.9 Real Number Instructions
(s)
(d)+3
Double-precision real number
(d)+2 (d)+1 (d)