Mitsubishi Electric MELSEC FX Series User Manual page 99

FX communication
2 ) Specification Example 1
To transmit the data stored in data registers D100 and D101 from the programmable
controller (when the station number is 0, and data is specified in word units)
Computer
Programmable
controller
M8127
Programmable
controller
On-demand
command
Program example
M8000
M8002
X000
0
M0 M8127
3
7
M8127 M8128
33
M8128
40
The PLC number "FE" is automatically added by the programmable controller.
S
T
X
02H
Write processing
D8127 100
➀
D8128 2
➁
M8129
PLS M0
FNC 12
H1234 D100
MOV
FNC 12
H5678 D101
MOV
RST M8128
RST Y000
RST Y001
FNC 12
K100 D8127
MOV
FNC 12
K2 D8128
MOV
SET Y000
SET Y001
END
M8128
0 0 F E 1 2 3 4 5 6 7 8
30H 30H 46H 45H 31H 32H 33H 34H 35H 36H37H38H
M8128 ON/OFF
M8129 OFF
D100 1234H
D101 5678H
Data transmission set to word units.
· · · · · · · · ·
Start command signals a pulse.
· · · · · · · · ·
Transmission data is set.
· · · · · · ·
On-demand error flag is reset
· · · · · · · · ·
(cannot start if M8128 is ON)
On-demand is started by specifying transmission data
· · · · · · ·
area head address and data length.
Confirming on-demand error, normal/abnormal external
· · · · · · ·
output is set.
OFF : Normally transmitted.
ON : Data is not transmitted due to error.
Commands 8
E
T 9 2
X
03H 39H 32H
Set ON if a transmission
error occurs
The 4 hexadecimal digits of
each word are transmitted
in ASCII, starting with the
most significant digit.
8-19
8