Rw Update Function - Mitsubishi MELSEC AJ65BT-R2 User Manual

8 OTHER FUNCTIONS

8.5 RW update function

The RW update function assigns part of the R2 buffer memory to the remote registers
(RW).
By using this function to assign the R2 buffer memory that constantly changes to the
RWr, the changes can be detected at a high speed on the master station side.
If assigned to RWw, part of the R2 buffer memory contents can be changed easily.
If a cause of data communication occurs between the area designated in the R2 buffer
memory's RW refresh destination address designation area ( R 2 43
master module's remote register (RW), the R2 buffer memory data will be updated
automatically.
Master station
Remote register (RW)
RWw0
7
RWw1
10
RWr0 4
RWr1 2
When a cause of automatic update
occurs in (1), it is updated automatically.
When the RW update function is used, the data will be written as follows.
• Master station (RWw)
The data written from the programmable controller CPU to the master station's
remote register (RWw) is automatically written into the R2 target buffer memory
when the cause of an automatic update occurs.
• R2 master station (RWr)
The data in the R2 target buffer memory is automatically written into the
corresponding remote register (RWr) of the master station when a cause of
automatic update occurs, and can be read to the programmable controller CPU.
Buffer memory
RWw0 43
H
RWr0 44
H
RWw1 45
H
RWr1 46
H
118
H
119
H
Automatic
update
1B0
H
1B1
H
R2
8 - 12
MELSEC-A
to 4A
H
R2
118
H
1B0
Refresh destination
H
119 designation
H
1B1
H
7
10
4
2
) and the
H