Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 119

Item MELSAP-L (instruction format)
Comparison operation Describe instructions in the same way as in ladder diagrams.
instruction corresponding to The following comparison operation instructions can be used.
contacts Comparing 16-bit binary data (signed): <, <=, <>, =, >, >=
Comparing 32-bit binary data (signed): D<, D<=, D<>, D=, D>, D>=
Comparing single-precision real numbers: E<, E<=, E<>, E=, E>, E>=
Comparing double-precision real numbers: ED<, ED<=, ED<>, ED=, ED>, ED>=
Comparing 16-bit binary data (unsigned): <_U, <=_U, <>_U, =_U, >_U, >=_U
Comparing 32-bit binary data (unsigned): D<_U, D<=_U, D<>_U, D=_U, D>_U, D>=_U
Comparing string data: $<, $<=, $<>, $=, $>, $>=
Parallel connection (OR) |
Series connection (AND) &
Parentheses ( )
When "&" and "|" are used in a single expression, "&" takes a priority. Use "( )" to alter priorities.
Example
< D10 D20
aX0 l aM0
aX0 & aM0
(aX0 l aM0) & aX1
8 SFC PROGRAM
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8.2 Structure
8