Allen-Bradley Micro800

Chapter 10 Compare instructions
264 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
For Integer, Real, Time, Date, and String values, Less Than compares input values
to determine whether the first is less than the second.
Arguments
Parameter
Parameter
Type
Data Type Description
EN Input BOOL Function enable.
When Enable = TRUE, execute the input comparison.
When Enable = FALSE, there is no comparison.
Applies only to LD programs.
i1 Input SINT - USINT - BYTE - INT - UINT -
WORD - DINT - UDINT - DWORD -
LINT - ULINT - LWORD - REAL -
LREAL - TIME - DATE - STRING
All inputs must be the same data type.
i2 Input SINT - USINT - BYTE - INT - UINT -
WORD - DINT - UDINT - DWORD -
LINT - ULINT - LWORD - REAL -
LREAL - TIME - DATE - STRING
o1 Output BOOL
TRUE if i1 < i2.
Less than (<) operator ST language example
(* ST Equivalence: *)
aresult := (10 < 25); (* aresult is TRUE *)
mresult := ('z' < 'B'); (* mresult is FALSE *)
(* IL equivalence: *)
LD
10
LT
25
ST
aresult
LD
'z'
LT
'B'
ST
mresult
Less than