Initializing The R2; Using The Buffer Memory Automatic Update Function - Mitsubishi MELSEC AJ65BT-R2 User Manual

5 PRELIMINARY INFORMATION

5.5 Initializing the R2

5.5.1 Using the buffer memory automatic update function

Programmable controller CPU
Bit device
1) Initial data read request ON
5) Initial data read request OFF
9) Initialization request ON
12) Initialization request OFF
8) Initialization data
Word
device
The methods for initializing the R2 are described below.
Initialization when using the buffer memory automatic update function changes the
contents of R 2 0 to 19F
H
The values of the initialization area ( R 2 0
operation.
The transmission/reception area address, size, range of buffer memory to be
automatically updated and the parameters, etc., can be set.
(1) Before initializing
1) Secure the automatic update buffer size (1C0
master station. (To write R 2 0
2) Set the R2 mode setting switch to "1" (automatic update function enabled).
(2) Flow of process
Steps 1), 5), 8), 9) and 12) are carried out
with the sequence program.
.
H
to 19F
H
to 1BF
H
Master station
2) Remote station ready OFF
4) Initial data read complete ON
6) Initial data read complete OFF
Remote
7) Remote station ready ON
input (RX)
11) Initialization normal/error complete ON
13) Initialization normal/error complete OFF
Remote
output (RY)
3) R2 default value
Automatic
update
10) Initialization data
buffer
Steps 2), 3), 4), 6), 7), 10) and 13)
are carried out by R2.
5 - 12
MELSEC-A
) can be changed by using this
H
or more) by initializing the
H
into the master station)
H
Remote
input (RX)
Remote
output (RY)
Buffer
memory
(initialization
area)
R2