Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1263

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 Operating time (ST) < 0
The execution cycle (T) setting is less than 0.
Sampling cycle (STHT) < 0
(Operating time (ST)execution cycle (T)) > 32767
(Sample cycle (STHT) execution cycle (T)) > 32767
11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
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