Mitsubishi Electric MELSEC FX Series - Page 142

FX communication
FX
2N
-232IF 10
10-22
4 ) Operation chart
(M10)
BFM#1000
Send byte count
Send
(M1)
BFM#1 b0
Send/receive enable
BFM#1001 to #1256
Send buffers
Send completion status is also reset
by next send command.
STX
BFM#28 b0
Send completion
BFM#13
Number of remaining
send data
9
8
7
0
BFM#1 b1
Send command
(M0)
6
5
4
3
2
1
(M2)
BFM#2
Receive upper
limit byte count
BFM#14
Number of receive
buffers
BFM#28 b1
Receive completion
BFM#1 b2
Receive completion reset
command
BFM#2001 to #2256
Receive buffers
BFM#2000
Receive byte count
(M11)
ETX
When not reset
Contents of receive buffers are also cleared.
8
7
0
6
5
4
3
2
1
STX
STX
#1001 lower
#1001 upper
#1002 lower
#1002 upper
#1003 lower
#1003 upper
#1004 lower
#1004 upper
#1005 lower
ETX
STX
#2001 lower
#2001 upper
#2002 lower
#2002 upper
#2003 lower
#2003 upper
#2004 lower
#2004 upper
ETX
1
0
2
3
4
Receive