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11 Applied Instructions (Data Operation)
11.5 BON / Check Specified Bit Status
239
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
11
Appl
ied
 In
stru
cti
ons 
(D
ata O
per
at
io
n)
12
Ap
plied
 Instru
ctio
ns 
(High S
peed 
Process
ing)
13
App
lied Instr
ucti
ons 
(Handy
 
Instruction)
14
Ap
pl
ied In
struct
ions 
(External FX I/O
 
D
evice)
15
Appl
ied
 Instru
cti
ons
 
(External
 Dev
ice 
(op
tional
 dev
ice)
)
16
App
lie
d Instr
uction
(E
xter
nal
 Devi
ce)
17
Ap
pl
ied Inst
ruct
io
ns 
(Dat
a T
ransf
er 2)
18
Appl
ied
 In
stru
cti
ons 
(Float
ing P
oin
t)
19
App
lie
d Instr
uction
(D
at
a Oper
at
ion 2)
20
App
lied Inst
ructi
ons 
(Pos
itioning 
Control)
11.5
BON / Check Specified Bit Status
Outline
This instruction checks whether a specified bit position in a device is ON or OFF. 
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
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
BON
16 bits
Continuous
BON(EN,s,n,d);
BONP
16 bits
Pulse
BONP(EN,s,n,d);
DBON
32 bits
Continuous
DBON(EN,s,n,d);
DBONP
32 bits
Pulse
DBONP(EN,s,n,d);
Variable
Description
Data type
16-bit 
operation
32-bit 
operation
Input
variable
EN
Execution condition
Bit
Word device storing the data
ANY16
ANY32
Bit position to be checked
[n=0 to 15 (16-bit instruction), n=0 to 31 (32-bit instruction)]
ANY16
Output
variable
ENO
Execution state
Bit
Bit device to be driven
Bit
Operand 
type
Bit Devices
Word Devices
Others
System User
Digit Specification System User
Special 
Unit
Index
Constant
Real 
Number
Character 
String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS T C D
R U
\G
V Z Modifier K
H
E
"
"
P
z
z
z
z z z z
S3
S4
z z
z
z
z
S2 S3
z
z
z z
z
S1
z
BON
EN
s
n
ENO
d
BONP
EN
s
n
ENO
d
DBON
EN
s
n
ENO
d
DBONP
EN
s
n
ENO
d