475
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
16 External FX Device – FNC 80 to FNC 89
16.1 FNC 80 – RS / Serial Communication
11
FNC3
0-F
NC3
9
R
otati
on and
Shif
t
12
FNC4
0-F
NC4
9
D
ata
O
per
ati
on
13
FN
C
50-FN
C
59
H
igh Speed
Pr
ocess
ing
14
FM
C
60-
FN
C
69
H
andy
In
st
ru
ct
ion
15
FNC7
0-F
N
C7
9
Ex
ter
nal
FX
I/O
D
evice
16
FN
C
80-FN
C
89
Ext
ernal FX
De
vic
e
17
FN
C
100-
FN
C
109
Da
ta
Transf
er 2
18
FN
C
110-
FN
C
139
Fl
oati
ng Poi
nt
19
FN
C
140
-F
N
C
14
9
Da
ta
O
per
ati
on 2
20
FN
C
150-
FN
C
159
Posit
ioning
C
ontr
ol
16.1
FNC 80 – RS / Serial Communication
Outline
This instruction sends and receives data in no-protocol communication by way of a serial port (only the ch1) in
accordance with RS-232C or RS-485 provided in the main unit.
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
1. 16-bit operation (RS)
This instruction sends and receives data in no-protocol communication by way of serial ports in accordance
with RS-232C or RS-485 provided in the main unit.
→
For detailed explanation, refer to the Data Communication Edition manual.
Operand type
Description
Data type
Head device of data registers storing data to be sent
16-bit binary or
character string
m
Number of bytes of data to be sent [setting range: 0 to 4096]
16-bit binary
Head device of data registers storing received data when receiving is completed
16-bit binary or
character string
n
Number of bytes to be received [setting range: 0 to 4096]
16-bit binary
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS T C D R U
\G
V Z Modify K H
E
"
"
P
3 3
3
m
3 3
3 3
3 3
3
n
3 3
3 3
FNC 80
RS
−
Mnemonic
Operation Condition
16-bit Instruction
9 steps RS
Mnemonic
Operation Condition
Continuous
Operation
32-bit Instruction
S
1
S
D
S
1
S
S
2
D
FNC 80
RS
m
S
Command
input
D
n