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5 PRELIMINARY INFORMATION
Initial data read request signal
(RY(n+1)9)
Initial data read complete
signal
(RX(n+1)9)
Remote station READY
(RX(n+1)B)
Initialization request signal
Initialization normal/error
complete signal
(RXn4/RXn5)
Master station automatic
update buffer
R2 initialization area
No.
1)
The initial data read request signal (RY(n+1)9) turns ON.
2)
The remote station READY (RX(n+1)B) turns OFF.
The initialization area (
3)
the master station's automatic update buffer.
4)
The initial data read complete signal (RX(n+1)9) turns ON.
5)
The initial data read request signal (RY(n+1)9) turns OFF.
6)
The initial data read complete signal (RX(n+1)9) turns OFF.
7)
The remote station READY (RX(n+1)B) turns ON.
8)
The values to be changed are written to the master station's automatic update buffer.
9)
The initialization request signal (RYn4) turns ON.
The contents of the master station's automatic update buffer are stored in the initialization area
10)
(
0
to 19F
R 2
H
11) The initialization normal/error complete signal (RXn4/RXn5) turns ON.
12) The initialization request signal (RYn4) turns OFF.
13) The initialization normal/error complete signal (RXn4/RXn5) turns OFF.
(3) Timing chart
1)
2)
(RYn4)
3)
3)
0
to 19F
) and status storage area (
R 2
H
H
).
H
POINT
If the R2 initialization is completed with an error, remove the cause of the error, and
repeat the initialization request until the process ends normally.
R2 will not accept other requests until the initialization is completed normally.
(If an initialization error occurs, the remote station READY signal (RX(n+1)B) will
turn OFF.)
5)
6)
7)
4)
8)
Details
R 2
5 - 13
MELSEC-A
12)
13)
9)
10)
11)
Carried out with sequence program
Carried out by R2
1A0
to 1BF
) are stored in
H
H
Control side
Program
R2
R2
R2
Program
R2
R2
Program
Program
R2
R2
Program
R2
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Table of Contents
Troubleshooting
