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Chapter 5 Instruction Specifications
5-44
Item number Basic instructions-35 Name Signed ≤ Relational box (SIGNED ≤ RELATINAL 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
37.5 53
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,
WDT, MS,
TMR, CU,
RCU, CT
WX WY
WR,
WL,
WM
TC DX DY
DR,
DL,
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 less than or equal to s2, it enters the continuity status (on) and
if s1 is greater than s2, it 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
R008
DR0000
S < =
DR0002
LD (DR0000 S<= DR0002)
OUT R008
Program description
z
When DR0000 ≤ DR0002, R008 turns on (signed).
LD (s1 S <= s2)
AND (s1 S <= s2)
OR
(
s1 S <= s2
)