Buffer Memory; Buffer Memory List - Mitsubishi MELSEC-Q Series User Manual

8 PROGRAMMING

8.3 Buffer Memory

8.3.1 Buffer memory list

Address
Hexadecimal Decimal
0 to DF 0 to 223 Use prohibited
H H
E0 224
H
to to Remote input (RX)
15F 351
H
160 352
H
to to Remote output (RY)
1DF 479
H
Remote register (RWw)
1E0 480 Master station:
H
to to For sending
2DF 735 Local station:
H
For sending/receiving
Do not write to any area where use is prohibited. This may cause errors.
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The buffer memory transfers data between the master/local module and the PLC CPU.
The reading and writing of data are performed by parameter settings or with dedicated
instructions using the GX Developer.
The contents of the buffer memory return to the default when the power is turned OFF
or the PLC CPU is reset.
The buffer memory list is shown in Table 8.2.
Table 8.2 Buffer memory list (1/2)
Item
For the master station: Stores the input status
For the local station : Stores the input status
For the master station: Stores the output status to
For the local station : Stores the output status to
For the master station: Stores the send data to
For the local station : Stores the send data to the
Description
—
from the remote/local
/intelligent device/standby
master stations.
from the master station.
the remote/local /intelligent
device/standby master
stations.
the master station.
Also, stores the receive
data from the remote/other
local/intelligent
device/standby master
stations.
the remote device/all local
/intelligent device/standby
master stations.
master/other
local/intelligent
device/standby master
stations.
Also, stores the receive
data from the remote
device/other
local/intelligent
device/standby master
stations.
MELSEC-Q
Availability
Read/write
Master Local
possibility
station station
— — —
—
Read only
—
Write only —
Read/write
—
enabled
Write only —
Read/write
—
enabled
: Available, — : Not available
Reference
section
—
Section
8.3.2 (1)
Section
8.3.2 (2)
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