Communication Data Area For Master Function - Mitsubishi Electric QJ71DN91 User Manual

3 SPECIFICATIONS

3.4.6 Communication data area for master function

Buffer memory
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Communication data for the master function are stored in this area.
(1) Master Function Receive Data (address: 0700
2047)
Data received from each slave node are stored.
Data are aligned on word boundaries of slave nodes and stored as shown below.
For double-word data, the low word is stored first and then the high word.
When the number of byte input modules is an odd number, one byte of an empty
area is inserted.
Bit input modules are treated in the same way as byte input modules.
The following is an example.
<Example>
1st node - Number of byte input modules = 3
2nd node - Number of byte input modules = 1
3rd node - Number of byte input modules = 1
address
0700
2nd byte module
H
0701 Empty
H
0702 1st word module
H
0703 2nd word module
H
Low word of the
0704
H
1st double-word module
High word of
0705
H
the 1st double-word module
Low word of
0706
H
the 2nd double-word module
High word of
0707
H
the 2nd double-word module
0708
Empty
H
0709
Empty
H
Word input module: Numeric data represented by 9 to 16 bits
Double-word input module: Numeric data represented by 17 to 32 bits
Byte input module: On/off data, or numeric data represented by 1 to 8 bits
Number of word input modules = 2
Number of double-word input modules = 2
When the number of byte input
modules is an odd number, one
byte of an empty area is inserted.
1st byte module
3rd byte module
Input data of the 1st node
1st byte module
Input data of the 2nd node
1st byte module Input data of the 3rd node
MELSEC-Q
to 07FF /1792 to
H H
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