Mitsubishi Electric MELDAS C6 Programming Manual page 165

LDD<, ANDD<, ORD<, LDD<=, ANDD<=, ORD<= ... Comparison of 32-bit data (<, <=)
Bit device
X Y M L F B SB T SM V T
S1
S2
LDD<
ANDD<
ORD<
LDD<=
ANDD<=
ORD<=
Function
(1) 32-bit comparison operation is executed with "A" contact handling.
(2) The comparison operation results will be as follows.
Command
LDD<, ANDD<, ORD<
LDD<=, ANDD<=, ORD<=
Execution conditions
The execution conditions for LDD<, ANDD<, ORD<, LDD<=, ANDD<= and ORD<= are as follows.
Command
LDD<, LDD<=
ANDD<, ANDD<=
ORD<, ORD<=
8. Function Commands
LD<>, AND<>, OR<>
Usable device
Word device
C D R W SW Z SD K
D< S1 S2
S1
D< S2
D< S1 S2
D<= S1 S2
D<= S1 S2
D<= S1 S2
Conditions
S1<S2
S1>=S2
S1<=S2
S1>S2
Executed per scan
Executed only when previous contact command is ON
Executed per scan
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Con-
Pointer
stant
H P
Setting data
Comparison data or
S1
head No. of device
where comparison
S2
data is stored.
Comparison operation results
Continuity state
Non-continuity state
Continuity state
Non-continuity state
Execution conditions
Digit
No. of
desig- Index
steps
nation
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