Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1873

Operation error
Error code Description
(SD0)
3401H An out-of-range value is input to (s).
• ASCII code: other than 30H to 39H, 20H, and 00H
• STRING data type value: other than -32768 to 32767
25 TYPE CONVERSION FUNCTIONS
25.56 Converting STRING to INT
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