Mitsubishi Electric FX3U-232-BD User Manual page 691

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (FX
3. Operation chart
BFM#1 b0
Sending/receiving
(M0)
enable
BFM#1 b1
(M1)
Sending command
BFM#13
Amount of remaining
send data
BFM#1001 to #1256
Send data buffer
BFM#28 b0
(M10)
Sending complete
BFM#14
Amount of received
data buffers
BFM#2000
Number of received
bytes
The contents of received data buffer are cleared also.
BFM#2001 to #2256
Received data buffer
BFM#28 b1
(M11)
Receiving complete
BFM#1 b2
(M2)
Receiving complete flag reset command
-232IF)
2N
9 8 7
6 5
4 3 2
1
0
The sending complete flag is
set to OFF also by the next
sending command.
BFM#1000
Number of bytes
to be sent
4
3
2
1
0
8
7
6
5
4
3
2
1
0
BFM#2
Maximum number of
receivable bytes
6.1 Example of Sending/Receiving 16-Bit Buffer Length Data
When the receiving complete flag is not reset
6 Practical Program Examples
G-35
A
B
C
D
E
F
G
H
I
Apx.A