Mitsubishi Electric MELSEC FX Series User Manual page 107

FX communication
4 ) Time-out evaluation <M8129> (Valid in the FX
V2.00)
If receive is not restarted within the time specified by D8129 after the receive data is
interrupted on the midway, it is regarded as time-out, M8129 is turned on, and receive is
completed (Refer to the figure below.).
M8129 is not automatically turned OFF. Reset it using a sequence program.
When this function is used, data can be received without using a terminator even in
equipment in which the number of send data may be changed.
Receive
Time-out evaluation
M8129
Receive completion
M8123
5 ) Time-out evaluation time <D8129> (Valid in V 2.00 or later of the FX
controller)
Set the time used for time-out evaluation described above. The value set here multiplied by
"10 ms" is regarded as the evaluation time.
When D8129 is set to "0", the evaluation time equates to "100 ms".
Example: When the time-out evaluation time is set to "50 ms"
M8002
Receive data is
interrupted
Data
D8129 ×10ms
ON
ON
FNC 12
K 5 D8129
MOV
, FX programmable controller earlier than
2N 2NC
Reset by program
RS instruction 9
, FX programmable
2N 2NC
9-5
9