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MELSEC-
A
7 USING FRAMES WHEN EXCHANGING DATA
POINT
When the setting value for
R2
0H to 112H has been changed, initialize the R2 as
explained in section 8.6.
When the setting values for the buffer memory following
R2
113H has been
changed, the initialization process is not required.
(a) Monitor target designation (When designating RX/RY/RW)
(
R2
78H, 7AH,
⋅
⋅
⋅
F4H, F6H)
Set the transmission trigger detection device for the R2 when carrying out
monitor transmission.
0
b15 b0
78
H
F7
H
b14 b13 b12 b11
~
…
(Monitor target)
Monitor target (RX/RY/RW)
1) Device No.
2) Monitor target device
3) Transmission trigger conditions
1) Device No.
Designate the RX/RY/RW No. monitored by the R2 to detect the
transmission trigger using the RX/RY/RW stored in the master station
buffer memory as a target.
(Example) To designate RX5 of first station's remote module: H005
To designate RX5 (RX25) of second station's remote
module: H025
RX5RXF
RX1F RX1E RX1D RX1C RX1B RX1A RX19 RX18 RX17 RX16 RX15 RX14 RX13 RX12 RX11 RX10
RX2F RX2E RX2D RX2C RX2B RX2A RX29 RX28 RX27 RX26 RX25 RX24 RX23 RX22 RX20
RX3F RX3E RX3D RX3C RX3B RX3A RX39 RX38 RX37 RX36 RX35 RX34 RX33 RX32 RX31 RX30
RXE RXD RXC RXB RXA RX9 RX8 RX7 RX6 RX4 RX3 RX2 RX1 RX0
b15 b14 b13 b12 b11 b10 b8 b7 b6 b5 b4 b3 b2 b1 b0b9
E0
H
E1
H
E2H
E3H
RX21
Master station address
First
station
Second
station
2) Monitor target device
The monitor target device designates what the above device No. target
device is.
Bit position
b13 b12
Monitor target device
00 RY
01 RX
10 RWw
11 RWr