Справочник Пользователя для Mitsubishi Electronics FXCPU
15 Applied Instructions (External Device (optional device))
15.8 RS2 / Serial Communication 2
411
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
11
Appl
ied
ied
In
stru
cti
cti
ons
(D
ata O
per
at
io
n)
12
Ap
plied
Instru
ctio
ns
Instru
ctio
ns
(High S
peed
Process
ing)
13
App
lied Instr
lied Instr
ucti
ons
(Handy
Instruction)
14
Ap
pl
ied In
struct
struct
ions
(External FX I/O
D
evice)
15
Appl
ied
ied
Instru
cti
cti
ons
(External
Dev
ice
ice
(op
tional
dev
ice)
)
tional
dev
ice)
)
16
App
lie
lie
d Instr
uction
s
s
(E
xter
nal
nal
Devi
ce)
17
Ap
pl
ied Inst
ruct
io
io
ns
(Dat
a T
ransf
er 2)
a T
ransf
er 2)
18
Appl
ied
ied
In
stru
cti
cti
ons
(Float
ing P
oin
oin
t)
19
App
lie
lie
d Instr
uction
s
s
(D
at
a Oper
at
ion 2)
20
App
lied Inst
lied Inst
ructi
ons
ons
(Pos
itioning
Control)
15.8
RS2 / Serial Communication 2
Outline
This instruction transmits and receives data by no-procedure communication via serial port of RS-232C or
RS-485 installed in the basic unit.
In the case of FX
RS-485 installed in the basic unit.
In the case of FX
3G
and FX
3GC
PLCs, data can be transmitted and received by no-procedure communication
also via standard built-in port (RS-422).
1. Format and operation, execution form
2. Set data
*1.
Rounding up below the decimal point
*2.
Ch0 is applicable to FX
3G
and FX
3GC
PLCs only.
In the case of FX
3S
and FX
3G
(14-point and 24-point type) PLCs, ch2 cannot be used.
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
RS2
16 bits
Continuous
RS2(EN, s, m, n, n1, d);
Variable
Description
Data type
Input
variable
variable
EN
Execution condition
Bit
Head device in which transmission data is stored
•
•
16-bit processing mode: m
÷2 points
*1
occupied
ANY16
Number of transmission data bytes [Setting range: 0 to 4096]
ANY16
Number of reception data bytes [Setting range: 0 to 4096]
ANY16
Used channel number [Setting content: K0: ch0, K1: ch1, K2: ch2]
*2
ANY16
Output
variable
variable
ENO
Execution state
Bit
Head device for storing reception data upon completion of reception
•
•
16-bit processing mode: n
÷2 points
*1
occupied
ANY16
Operand
type
Bit Devices
Word Devices
Others
System User
Digit designation
System
User
Special
Unit
Index
Cons
tant
Real
Number
Character
String
Pointer
X Y M T C S D
.b KnX KnY
Kn
M
KnS T C D R U
\G
V Z Modifier K H
E
"
"
P
z
S1
z
z
S1
z z
z
S1
z z
z z
z
S1
z
RS2
EN
s
s
ENO
m
n
n1
n
n1
d