Buffer Memory Details - Mitsubishi MELSEC-Q Series User Manual

8 PROGRAMMING

8.3.2 Buffer memory details

Master station
Remote input (RX)
Address
E0
For station H
number 1
E1 RX 1F to RX 10
H
E2 RX 2F to RX 20
For station H
number 2
E3 RX 3F to RX 30
H
E4 RX 4F to RX 40
For station H
number 3
E5 RX 5F to RX 50
H
RX 6F to RX 60
E6
For station
H
number 4
E7 RX 7F to RX 70
H
RX 8F to RX 80
E8
For station
H
number 5
E9 RX 9D to RX 90
H
to
15C RX7CF to RX7C0
For station H
number 63
15D RX7DF to RX7D0
H
15E RX7EF to RX7E0
For station H
number 64
15F RX7FF to RX7F0
H
8 - 7
The following explains the details of items shown in Table 8.2, "Buffer Memory List" in
Section 8.3.1.
(1) Remote input (RX) and remote output (RY)
(a) Master station
1) Master station
The input status from the remote I/O station, remote device station
(RX) and local station (RY) is stored.
Two words are used per station.
2) Local station
Data to be sent to the master station is stored in the remote output
(RY) of the address corresponding to the host station number.
The input status from the remote I/O station, remote device station
(RX) and other local station is stored.
Two words are used per station.
... The last two bits cannot be used for communication between the master
station and the local station.
(In the example below, RY9E and RY9F cannot be used.)
(Station number 1: occupies 1 station)
RX F to RX 0
to
remote I/O station/remote device station/local station
Remote I/O station
X0F to X00
X1F to X10
MELSEC-Q
Local station
(Station number 2: occupies 4 stations)
Remote output (RY)
RY F to RY 0 160
RY 1F to RY 10 161
RY 2F to RY 20 162
RY 3F to RY 30 163
RY 4F to RY 40 164
RY 5F to RY 50 165
RY 6F to RY 60
166
RY 7F to RY 70 167
RY 8F to RY 80
168
RY 9D to RY 90 169
to to
RY7CF to RY7C0 1DC
H
RY7DF to RY7D0 1DD
H
RY7EF to RY7E0 1DE
H
RY7FF to RY7F0 1DF
H
Address
H For station
number 1
H
H For station
number 2
H
H For station
number 3
H
For station
H
number 4
H
For station
H
number 5
H
For station
number 63
For station
number 64
8 - 7