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MELSEC-
A
8 OTHER FUNCTIONS
(2) Flow of process
R2
Master station
Bit device
Remote
input (RX)
Remote
output (RY)
Remote
output (RY)
Remote
input (RX)
Programmable controllerCPU
OS recep-
tion area
1) OS reception area clear
request ON
2) OS reception area
clear execution
3) OS reception area clear
complete ON
4) OS reception area clear
request OFF
5) OS reception area clear
complete OFF
(3) Timing chart
3)
5)
4)
1)
Carried out with sequence program
Carried out b
y
R2
OS reception area clear
request signal (RYn6)
OS reception area clear
complete signal (RXn6)
2) Clear OS
reception area
No. Details Control side
1) The OS reception area clear request signal (RYn6) turns ON. Program
2) Clearing of the OS reception area starts. R2
3)
When clearing of the OS reception area is completed, the OS reception area clear complete signal
(RXn6) turns ON.
R2
4) The OS reception area clear request signal (RYn6) turns OFF. Program
5) The OS reception area clear complete signal (RXn6) turns OFF. R2
POINT
•
Only the OS reception area is cleared with the OS reception area clear
function.
The R2 buffer memory reception area is not cleared.
•
When using non-procedural reception or frame reception, if the OS reception
area clear function is carried out, all of the reception data stored in the OS
reception area will be cleared.