Standard Rs-232C Mode - Mitsubishi Electric MELSEC FX Series User Manual

FX communication
10.3.2

Standard RS-232C Mode

Setting BFM #0 (b9, b8) = (0, 1)
Send/receive
enable
(BFM#1 b0)
DR(DSR)
Send
command
(BFM#1 b1)
RS(RTS)
CS(CTS)
Send data
SD(TXD)
Send
completion
(BFM#28 b0)
Receive data
RD(RXD)
Receive
completion
(BFM#28 b1)
Receive
completion reset
command
(BFM#1 b2)
*1 Turn off using a program. When it is turned ON, the next data cannot be sent
*2 Time set by BFM #21 (x10ms)
*3 Time set by BFM #22 (x10ms)
*4 Turn off using a program. When it is turned ON, the next data cannot be received.
*5 After receive is completed and the data is read, turn off the receive completion flag (BFM #28
b1) using a completion reset command (BFM #1 b2)
OFF ON
OFF ON
ON
OFF
OFF ON
OFF
ON
OFF
BFM#20
(X10ms) *3
OFF
Data 1
OFF
OFF
The receive wait
stafus is started.
*1 *1
BFM#21
*2
(X10ms)
Data 2
BFM#20
(X 10ms) *3
BFM#21
(X10ms) *2
Data 3
ON
*4
*5
FX
BFM#21(X10ms) *2
Data 4
BFM#21
(X10ms) *2
*5
*4
-232IF 10
2N
10
10-17