Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1018

• The following table lists the comparison operation results between A, B, and C. Even when the data are compared under
the same conditions, the results differ depending on the comparison target data.
Comparison target data
Day
Month
Month, day
Year
Year, day
Year, month
Year, month, day
None
*1 In FBD/LD, ENO ON indicates continuity and ENO OFF indicates non-continuity.
• Even though the specified date does not exist, the comparison operation is performed in accordance with the conditions in
the following table as long as the date data are within the valid range.
• Date A: 2006/02/30 (Even though the date does not exist, this date can be set.)
• Date B: 2007/03/29
• Date A: 2008/02/31 (Even though the date does not exist, this date can be set.)
Comparison target data
Day
Month
Month, day
Year
Year, day
Year, month
Year, month, day
None
*2 In FBD/LD, ENO ON indicates continuity and ENO OFF indicates non-continuity.
• If the LDDT_ instruction is used in the program written in FBD/LD, use a left rail or a variable/constant which is always on
for EN.
• If the ORDT_ instruction is used in the program written in FBD/LD and EN is set to TRUE, ENO turns on. EN will not be
an execution condition.
Operation error
There is no operation error.
7 APPLICATION INSTRUCTIONS
1016
7.25 Clock Instructions
*1
Condition
A<B B<C
Continuity Non-continuity
Non-continuity Continuity
Non-continuity Continuity
Continuity Continuity
Continuity Continuity
Continuity Continuity
Continuity Continuity
Non-continuity Non-continuity
*2
Condition
A<B B<C
Non-continuity Non-continuity
Non-continuity Non-continuity
Continuity Non-continuity
Continuity Continuity
Continuity Continuity
Continuity Continuity
Continuity Continuity
Non-continuity Non-continuity
A<C
Non-continuity
Non-continuity
Non-continuity
Continuity
Continuity
Continuity
Continuity
Non-continuity
A<C
Continuity
Non-continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Non-continuity