Mitsubishi Electronics AJ65bt-r2 ユーザーズマニュアル
6 - 10
MELSEC-A
6 EXCHANGING DATA WITH AN EXTERNAL DEVICE
(2) Timing chart
R2
1)
2)
3)
4)
6)
7)
5)
Carried out with sequence program
Carried out by R2
Carried out by R2
Word device
Transmission data
Transmission request
signal (RYn0)
signal (RYn0)
Transmission normal/error
complete signal
(RXn0/RXn1)
complete signal
(RXn0/RXn1)
Master station Automatic update area
(transmission area)
Transmission area
Transmission
Transmission complete
External device
Programmable
controller CPU
controller CPU
No.
Details
Control side
1)
The transmission data is written into the master station automatic update buffer (transmission
area).
area).
Program
2)
The transmission request signal (RYn0) turns ON.
Program
3)
The master station automatic update buffer (transmission area) data is read out and stored in the
R2 transmission area.
R2 transmission area.
R2
4)
The data is transmitted from the transmission area to the external device.
R2
5)
When the transmission to the external device is completed, the transmission normal complete
signal (RXn0) or transmission error complete signal (RXn1) turns ON.
signal (RXn0) or transmission error complete signal (RXn1) turns ON.
R2
6)
The transmission request signal (RYn0) turns OFF.
Program
7)
The signal turned ON in step 5) turns OFF.
R2