Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 385

Operation error
Error code Description
(SD0)
3401H A value other than 0 to 9 exists at any digit of the value in the device specified by (s).
*1 Turning on SM754 can prevent this error from being detected.
If the specified value is out of the valid range, the BIN(P) instruction is not executed regardless of the status (on/off) of SM754.
The BIN(P) instruction does not execute the next operation until the command (execution condition) is turned off and on regardless of
the presence of an error.
*1
6 BASIC INSTRUCTIONS
6.6 Data Conversion Instructions
6
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