Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 720

Operation error
Error code Description
(SD0)
The value input to (s) is -0, a subnormal number, NaN (not a number), or .
3402H
The value input to (d) is -0, a subnormal number, NaN (not a number), or .
3403H The data in the device specified by (d) exceeds the following range. (An overflow has occurred.)
|(d)|<2
7 APPLICATION INSTRUCTIONS
718
7.9 Real Number Instructions
128