Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1844

Operation error
Error code Description
(SD0)
3401H A value other than 0 to 9 exists at any digit of the value input to (s).
• Turning on SM754 can prevent the above error from being issued. If the specified value is out of the valid range, the
BCD_TO_DINT(_E) function is not executed regardless of the status (on/off) of SM754.
25 TYPE CONVERSION FUNCTIONS
1842
25.38 Converting BCD to DINT