Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1277

Operation error
Error code Description
(SD0)
3400H An invalid operation (such as division by zero) is performed.
3402H The value specified by (s1), (s2), or (d2) is a subnormal number or NaN (not a number).
3403H An overflow has occurred.
3405H The control cycle (CT) setting is less than 0.
The execution cycle (T) setting is less than 0.
The value divided the control cycle (CT) by the execution cycle (T) exceeds 32767.
11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
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