Mitsubishi FX3U-232-BD User Manual page 491

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
8.2.3 Send/receive data and amount of data
RS2 instruction can handle send data and receive data while storing two characters in one data register.
M8000
FNC 87
Communication format setting
Control line not provided
Headers provided
Terminators provided [DLE + ETX (D8412: 0310H D8413: 0000H)]
Sum check provided
CR + LF added
1. Send data and amount of remaining send data
Send data
M8402
Sending request
Set it in a program.
D8403
Amount of remaining
send data
D8416
Sending sum
D100 K4
RS2
[DLE + STX (D8410: 0210H D8411: 0000H)]
Header Data area
DLE STX 31H 32H
D8410 D8410 D100 D100
lowest lowest
highest highest
-order -order
-order -order
byte byte byte byte
4
3
2
00H 31H 63H 96H CAH DAH DDH
K1
D200 K20
Terminator Sum data . . . . . The order is different
33H 34H DLE ETX 44H
Sum
D101 D101 D8412 D8412
lowest lowest
highest highest highest
-order -order
-order -order
-order
byte byte byte byte
byte
1
0
8 Creating Programs (RS2 Instruction)
8.2 How to Use RS2 Instruction
from the data area
44H
Sum
CR LF
lowest
-order
byte
It is automatically reset
when sending is
completed
A
B
C
D
E
F
G
H
I
Apx.
F-53