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29 Applied Instructions (Data Table Operation)
29.1 LIMIT / Limit Control
679
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
21
Appl
ied
 In
stru
cti
ons 
(R
eal
 T
im
e 
C
lock
 Contr
ol)
22
Ap
plied
 Instru
ctio
ns 
(E
xt
er
na
l De
vi
ce
)
23
App
lied Instr
ucti
ons 
(Ex
tensi
on 
Functi
on)
24
Ap
pl
ied In
struct
ions 
(O
thers)
25
Appl
ied
 Instru
cti
ons
 
(B
lock
 Dat
a 
O
per
at
io
n)
26
App
lie
d Instr
uction
s 
(Charac
ter 
Stri
ng C
ontrol
)
27
Ap
pl
ied Inst
ruct
io
ns 
(D
ata
 Op
eration 3
)
28
Appl
ied
 In
stru
cti
ons 
(D
ata C
om
par
ison
)
29
App
lie
d Instr
uction
s 
(D
ata
 T
abl
e 
O
peration
)
30
Appli
ed In
struc
tions
(E
xt
ernal Devi
ce 
Comm
uni
cat
ion)
29.1
LIMIT / Limit Control
Outline
This instruction provides the upper limit value and lower limit value for an input numeric value, and control the
output value using these limit values.
1. Format and operation, execution form
2. Set data
FX
3U(C)
FX
3G(C)
FX
3S
FX
2N(C)
FX
1N(C)
FX
1S
FX
U
/FX
2C
FX
0N
FX
0(S)
Instruction 
name
Operation
Execution 
form
Expression in each language
Structured ladder/FBD
ST
LIMIT
16 bits
Continuous
LIMIT(EN,s1,s2,s3,d);
LIMITP
16 bits
Pulse
LIMITP(EN,s1,s2,s3,d);
DLIMIT
32 bits
Continuous
DLIMIT(EN,s1,s2,s3,d);
DLIMITP
32 bits
Pulse
DLIMITP(EN,s1,s2,s3,d);
Variable
Description
Data type
16-bit 
operation
32-bit 
operation
Input
variable
EN
Execution condition
Bit
Lower limit value (minimum output value)
ANY16
ANY32
Upper limit value (maximum output value)
ANY16
ANY32
Input value controlled by the upper and lower limit values
ANY16
ANY32
Output
variable
ENO
Execution state
Bit
Head device storing the output value controlled by the upper and
lower limit values
ANY16
ANY32
LIMIT
EN
ENO
d
s1
s2
s3
LIMITP
EN
ENO
d
s1
s2
s3
DLIMIT
EN
ENO
d
s1
s2
s3
DLIMITP
EN
ENO
d
s1
s2
s3