3 - 16 3 - 16
MELSEC-Q
3 SPECIFICATIONS
(b) Extended service mode (MODE E)
This is the area that stores the input data from the slave station.
In this area, the data length (in byte units) for each station is assigned in
variable length according to the parameter file set in the GX Configrator-DP.
The data length can be set in the range of 0 to 244 bytes.
Number of stations that can be set will vary in the range of 1 to 60,
depending on the specified data length. For example, seven stations can be
set if the data length for each station is 244 bytes, and 60 stations if the data
length is 32 bytes.
Example : When the input data length for the first station is set to 23 bytes
and that for the second station to 7 bytes
0(0
H
)
11(B
H
)
12(C
H
)
1st station input data
2nd station input data
n th station input data
60th station input data
1st station 2nd byte
1st station 4th byte
1st station 1st byte
1st station 3rd byte
1st station 22nd byte
1st station 21st byte
1st station 23rd byte
0(0
H
)
10(A
H
)
11(B
H
)
2nd station 2nd byte
2nd station 4th byte
2nd station 1st byte
2nd station 3rd byte
12(C
H
)
13(D
H
)
2nd station 6th byte
2nd station 5th byte
2nd station 7th byte
14(E
H
)
15(F
H
)
1(1
H
)
15(F
H
)
b15
b0
2
b15
b0
(Upper byte)
(Lower byte)
: Free area (00
H
)
2 When the data lenghth is set to an odd number
of bytes, the last upper byte becomes a free area
and data for the next station is assugned from
the next address.
Buffer memory
address decimal
(Hexadecimal)
Buffer memory
address decimal
(Hexadecimal)
