Mitsubishi MELSEC-Q/L Programming Manual page 586

DT=, DT<>, DT>, DT<=, DT<, DT>=
(b) Even if the dates to be compared do not exist practically, this instruction executes the comparison operation for the
objects with the settable dates in accordance with the following condition.
• Date A: 2006/02/30 (This date is settable, though it does not exist.)
• Date B: 2007/03/29
• Date C: 2008/02/31 (This date is settable, though it does not exist.)
Comparison
objects
Day
Month
Month, day
Year
Month, day
Year, month
Year, month, day
No objects
Operation Error
(1) There is no operation error in the DT=, DT<>, DT>, DT<=, DT<, or DT>= instruction.
Program Example
(1) The following program compares the data stored in D0 with the data (year, month, and day) stored in D10, and makes
Y33 be conductive status when the data stored in D0 meet the data stored in D10.
[Ladder Mode]
(2) The following program compares the data stored in D0 with the current date data (year and month), and makes Y33 be
conductive status when the data stored in D0 do not meet the current date data, when M0 is turned on.
[Ladder Mode]
(3) The following program compares the data stored in D0 with the data (year and day) stored in D10, and makes Y33 be
conductive status when the data value stored in D10 is smaller than the data value stored in D0, when M0 is turned on.
[Ladder Mode]
(4) The following program compares the data stored in D0 with the current date data (year), and makes Y33 be conductive
status when the value of the current date data is the data value stored in D0 or larger.
[Ladder Mode]
584
Comparison condition
A<B B<C
: Conductive : No-conductive
[List Mode]
Instruction
Step
[List Mode]
Instruction
Step
[List Mode]
Step Instruction
[List Mode]
Instruction
Step
A<C
Device
Device
Device
Device