706
7 APPLICATION INSTRUCTIONS
7.9 Real Number Instructions
Comparing double-precision real numbers
LDED, ANDED, ORED
These instructions perform a comparison operation of a double-precision real number. (Devices are used as a normally open
contact.)
*1 The engineering tool with version "1.035M" or later supports the ST.
*2 EQ indicates =, NE indicates <>, GT indicates >, LE indicates <=, LT indicates <, and GE indicates >=.
■Execution condition
■Description, range, data type
■Applicable devices
Ladder ST
*1
( is replaced by ED=, ED<>, ED>, ED<=, ED<, ED>=.)
ENO:=LDED_(EN,s1,s2);
ENO:=ANDED_(EN,s1,s2);
ENO:=ORED_(EN,s1,s2);
( is replaced by any of the following: EQ, NE, GT, LE, LT, GE.)
*2
FBD/LD
( is replaced by a combination of LDED_, ANDED_, or ORED_ and EQ, NE, GT, LE, LT, or GE.)
*2
Instruction Execution condition
LDED, ANDED, ORED Every scan
Operand Description Range Data type Data type (label)
(s1) Comparison data or the start device where the comparison
data is stored
0, 2
-1022
|(s1)|<2
1024
Double-precision real
number
ANYREAL_64
(s2) Comparison data or the start device where the comparison
data is stored
0, 2
-1022
|(s2)|<2
1024
Double-precision real
number
ANYREAL_64
EN Execution condition Bit BOOL
ENO Execution result Bit BOOL
Operand Bit Word Double word Indirect
specification
Constant Others
X, Y, M, L,
SM, F, B, SB,
FX, FY
J\ T, ST, C, D, W,
SD, SW, FD, R,
ZR, RD
U\G, J\,
U3E\(H)G
Z LT, LST,
LC
LZ K, H E $
(s1)
(s2)
RnCPU
RnENCPU
RnSFCPU RnSFCPURnPCPURnPCPU
(Standard) (Safety)
(Redundant)
(Process)
LD
AND
OR
(s1) (s2)
(s1) (s2)
(s1) (s2)
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