Mitsubishi Electronics FX3G User Manual
456
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
16 External FX Device – FNC 80 to FNC 89
16.1 FNC 80 – RS / Serial Communication
16.1
FNC 80 – RS / Serial Communication
Outline
This instruction sends and receives data using non-protocol communication by way of a serial port (only ch1) in
accordance with RS-232C or RS-485 provided in the main unit.
accordance with RS-232C or RS-485 provided in the main unit.
1. Instruction format
2. Set data
3. Applicable devices
S
: This function is supported only in FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLCs.
Explanation of function and operation
1. 16-bit operation (RS)
This instruction sends and receives data in non-protocol communication by way of serial ports in accordance with
RS-232C or RS-485 provided in the main unit.
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
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
S
m
S
S
n
S
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