Hitachi NJI-350B - Manual (Page 88)

Chapter 5 Instruction Specifications
5-38
Item number Basic instructions-29 Name Signed = Relational box (SIGNED = RELATIONAL BOX)
Ladder format Condition code Processing time ( µ s) Remark
R7F4 R7F3 R7F2 R7F1 R7F0 Average Maximum
(See Function column) DER ERR SD V C
z z z z z
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 X Y
R,
L,
M TD, SS,
CU, CT
WX WY
WR,
WM
TC DX DY
DR,
DM
C
o
ns
ta
nt
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
(s
1 == s
2)
A
N
D
(s
1 ==
s2
)
OR
(s1
=
=
s2
)