Mitsubishi MELSEC QS Series Programming Manual page 41

Remark
Refer to the manual below for how to change the internal user device allocation:
• QSCPU User's Manual (Function Explanation, Program Fundamentals)
(2) Device data check
Device data checks for the devices used by basic instructions and application instructions in
safety CPU module are as indicated below:
(a) When using BIN data
No error is returned even if the operation results in overflow or underflow.
The carry flag does not go on at such times, either.
(b) When using BCD data
1) Each digit is check for BCD value (0 to 9).
An operation error is returned if individual digits are outside the 0 to 9 (A to F) range.
2) No error is returned even if the operation results in overflow or underflow.
The carry flag does not go on at such times, either.
3.4 Cautions on Programming (Operation Errors)
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