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Chapter 5 Instruction Specifications
5-38
Item number Basic instructions-29 Name Signed = Relational box (SIGNED = RELATIONAL BOX)
Ladder format Condition code
Processing time (µs)
Remark
R7F4 R7F3 R7F2 R7F1 R7F0
Average Maximum
(See Function column) DER ERR SD V C
zzzzz
Command format Number of steps
35 50
LD (s1 S== s2)
Condition Steps
AND (s1 S== s2) Double word (See Cautionary notes)
OR (s1 S== s2)
Bit Word Double word
Usable I/O
XY
R,
L,
M
TD, SS,
CU, CT
WX WY
WR,
WM
TC DX DY
DR,
DM
Constant
Other
s1 Relational number 1 {{{{
s2 Relational number 2 {{{{
Function
[Ladder format]
s1
S==
s2
s1
S==
s2
s1
S==
s2
z Compares s1 and s2 as signed double-word numbers, and
if s1 is equals to s2, it enters the continuity status (on) and
if s1 is not equal to s2, enters the noncontinuity status(off).
z s1, s2 – 2147483648 to + 2147483647 (decimal)
H80000000 to H7FFFFFFF (hexadecimal)
b31
b0
Sign bit: 0 - Positive; 1 - Negative
Cautionary notes
[Number of steps]
Double word LD, AND (s1S==s2) OR (s1S==s2)
I/O I/O 5 steps 6 steps
I/O Constant 6 steps 7 steps
Constant I/O 6 steps 7 steps
Constant Constant 7 steps 8 steps
Program example
R002
DR0000
S = =
DR0002
LD (DR0000 S== DR0002)
OUT R002
Program description
z
When DR0000 = DR0002, R002 turns on (signed).
LD (s1 == s2)
AND (s1 == s2)
OR
(
s1 == s2
)