Mitsubishi Electric FX3U-232-BD User Manual page 326

FX Series PLC User's Manual - Data Communication Edition
Computer Link
3. Specification example 2
When sending the data stored in the data registers D100 and D101 by a trigger from a sequence program
(when the station number is 0 and the data unit to be sent is set to "byte")
Computer side
PLC side
M8127
PLC
On-demand
command
[1]
Sequence program example
M8000
0
X000 M8002
3
M0 M8127
7
M8127 M8128
33
M8127 M8128
37
40
D-84
The PLC number "FE" is automatically added by the PLC.
S
T 0 0
X
30 30
02
H
H
Writes data to be
sent and amount of
data to be sent.
D8127 100 M8128
D8128 4 M8129
[2]
M8129
PLS M0
MOV H1234 D100
MOV H5678 D101
RST M8128
RST Y000
RST Y001
MOV K100 D8127
MOV K4 D8128
SET Y000
SET Y001
END
F E 3 4 1 2 7 8 5 6
38 35
46 45 31 32 33 34 37
H H H H H H H H H
ON/OFF
ON
D100 1234H
D101 5678H
........
The data unit is set to "byte" value.
........
The startup command is the pulse operation type.
........
Data to be sent is set.
The on-demand error flag is reset.
........
(The on-demand function is disabled while M8128 is
ON.)
The head device number storing the data to be sent
........
and the amount of data are specified, and the on-
demand function is started up.
On-demand error is checked for, and the check result
........
is output.
M8128 OFF:
ON:
7.13 On-demand Function
E
T 9 2
X
36 03
39 32
H H H H H
It turns ON when an error is
included in the specified
value for sending.
Data is sent in 4-bit units, in
the order "lowest-order 8-bit 
highest-order 8-bit".
Data is sent normally.
Data is not sent because an
error occurred.
7 Commands