Planning Your Application Program
And the response should be:
Chapter 6
Figure 6-2: Response Comment Structure
6-3-2 Modbus Function Code Introduction
To full-fill the programming requirement, there is a series of function code
standard for user’s reference...
C
o
de
(He
x
)
N
a
m
e
U
s
a
ge
01
Re
ad
Co
il
Sta
t
u
s
Re
ad
D
i
sc
r
e
te
Ou
t
pu
t
Bit
02
R
ea
d
I
nput
St
at
us
R
ea
d
D
i
sc
r
e
t
e
I
nput
Bi
t
03
Re
ad
H
o
ldin
g
Reg
ister
s
R
ea
d
16-bi
t r
e
g
i
s
t
e
r
.
U
s
ed
t
o
r
e
ad
i
n
te
ge
r
o
r
04
R
ea
d
I
nput
R
e
gi
s
t
e
r
s
fl
oa
ti
ng
poi
nt
pr
oce
ss
dat
a
.
05
F
o
r
c
e
S
i
n
gl
e
C
oi
l
W
rit
e
da
t
a
t
o
f
o
rce
c
oi
l
O
N
/
O
FF
06
P
r
eset
S
i
ng
l
e
R
e
g
is
ter
W
ri
te
d
a
ta
i
n
16
-
b
it i
n
t
eg
er
fo
r
m
at
08
Loopback
D
i
a
gnos
i
s
D
i
agno
st
i
c
t
e
st
i
ng
o
f t
he
c
o
mm
uni
ca
ti
on
por
t
15
F
o
r
c
e
Mul
ti
pl
e
C
oi
l
s
Wri
t
e
mul
ti
pl
e
d
at
a
t
o
f
or
c
e
c
o
il
O
N
/
O
FF
16
P
r
eset
M
u
ltip
le
R
e
g
i
ster
s
W
ri
te
m
u
lti
p
le
da
ta
in
16
-
b
it i
n
t
eg
e
r
fo
r
m
at
Table 6-1: Response Comment Structure
Function Code 01
The function code 01 is used to read the discrete output’s ON/OFF sta-
tus of ADAM-5000/TCP in a binary data format. Request message
format for function code 01:
Command
Body
Station
Address
Function
Code
Start
Address
High
Byte
Start
Address
Low
Byte
Requested
Number of
Coil
High
Byte
Requested
Number of
Coil Low
Byte
ADAM-5000/TCP User’s Manual
6-33
To Next Page
Loading...
Need help?
General
