Mitsubishi Electric MELSEC iQ-R Series User Manual page 90

Master function transmit/receive data area
This area is used to store the master function transmit/receive data.
■Master function receive data (Un\G1792 to Un\G2047)
The data received from each slave node is stored.
The data is sorted on the word border for each module.
For the double-word module, it is stored in the order from lower word to upper word.
Ex.
1st node: Number of byte modules = 3, number of word modules = 2, number of double-word modules = 2
2nd node: Number of byte modules = 1
3rd node: Number of byte modules = 1
Buffer memory address
Un\G1792
Un\G1793
Un\G1794
Un\G1795
Un\G1796
Un\G1797
Un\G1798
Un\G1799
Un\G1800
Un\G1801

*1 When the number of byte modules is an odd number, a one-byte empty area is inserted.
■Master function transmit data (Un\G2304 to Un\G2559)
Set the data to be transmitted to each slave node.
The data is sorted on the word border for each module.
For the double-word module, it is stored in the order from lower word to upper word.
Ex.
1st node: Number of byte modules = 3, number of word modules = 2, number of double-word modules = 2
2nd node: Number of byte modules = 1
3rd node: Number of byte modules = 1
Buffer memory address
Un\G2304
Un\G2305
Un\G2306
Un\G2307
Un\G2308
Un\G2309
Un\G2310
Un\G2311
Un\G2312
Un\G2313

*1 When the number of byte modules is an odd number, a one-byte empty area is inserted.
APPX
88
Appendix 3 Buffer Memory
b15 to b8
2nd byte module
*1
Empty
1st word module
2nd word module
Lower word of the 1st double word module
Upper word of the 1st double word module
Lower word of the 2nd double word module
Upper word of the 2nd double word module
*1
Empty
*1
Empty

b15 to b8
2nd byte module
*1
Empty
1st word module
2nd word module
Lower word of the 1st double word module
Upper word of the 1st double word module
Lower word of the 2nd double word module
Upper word of the 2nd double word module
*1
Empty
*1
Empty

b7 to b0
1st byte module
3rd byte module
1st byte module
1st byte module

b7 to b0
1st byte module
3rd byte module
1st byte module
1st byte module

Input data to be stored
1st node input data
2nd node input data
3rd node input data

Input data to be output
1st node output data
2nd node output data
3rd node output data
