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MELSEC-Q
3 SPECIFICATIONS
(29) Master Function Transmit Data (addresses 0900
H
to 09FF
H
/2304
to 2559)
The data to be transmitted to each slave node is written by the TO instruction.
The data assignment is shown below.
The data is stored in the word boundaries of the slave nodes. Double-word data
is stored in the order of lower word first and higher word next. If there is an odd
number of byte input modules, one byte of empty area will be inserted for
alignment at the word boundary.
The following shows an example.
<Example>
1st node - Number of byte output modules = 3
Number of word output modules = 2
Number of double-word output modules = 2
2nd node - Number of byte output modules = 1
3rd node - Number of byte output modules = 1
Buffer memory
address
0900
H
0901
H
0902
H
0903
H
0904
H
0905
H
0906
H
0907
H
0908
H
0909
H
If there is an odd number of
byte output modules, one byte
of empty area will be inserted.
Output data of the 1st node
Output data of the 2nd node
Output data of the 3rd node
2nd byte module
1st byte module
3rd byte module
Empty
1st word module
2nd word module
Lower word of
the 1st double-word module
Higher word of
the 1st double-word module
Lower word of
the 2nd double-word module
Higher word of
the 2nd double-word module
1st byte module
1st byte module
