Mitsubishi MELSEC-A Series Reference Manual page 165

7. DATA LINK SETTINGS
(2) Assignment of link register (W)
(a) Assignment for the master station and local stations (M/L area)
Fig 7.10 shows the case when assigning 256 points to the master station, 128
points to local station No.1, 196 points to local station No.2, and 128 points
empty area between local station No.1 and local station No.2.
Fig 7.10 Link register (W) assignment example
(b) The empty area marked with *1 in the M/L area in Fig 7.10 cannot be used as a
substitute for data register (D) in the master station and all local stations.
The M/L area is the range of the smallest to the largest device number (W0 to
2BF) assigned by the link parameters.
7 - 27