Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1345

Operation error
Error code Error content
3400H An invalid operation (such as division by zero) is performed.
3402H The value specified by (s1), (s2), (d2), or (s3) is a subnormal number or NaN (not a number).
3403H An overflow has occurred.
11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
11
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