Mitsubishi Electric MELSEC FX Series - Page 110

FX communication
RS instruction 9
9-8
3 ) Use normal mode 1 of control line
Note:
* When using FX
1S
, FX
1N
, FX
0N
, FX, or FX
2C
, this period should be longer than 2 scan times or
more.
Reset using a program.
When it is not trurned off, the next
data cannot be received.
Data 1
RS instruction
driving
Send wait
flag M8121
Send data SD
(TXD)
OFF ON
Data 3
Data 2
OFF ON
Send request
M8122
Receive data
RD (RXD)
Receive
completion
M8123
OFF ON
ONOFF
ON
ON
OFF
OFF
This period should be 100
µ
s or more
ER(DTR)
DR(DSR)