Mitsubishi QJ71LP21 Reference Manual page 141

5 PARAMETER SETTINGS
5 - 21
POINT
(1) LX/LY cannot be automatically set with the Default button.
(b) Setting method
When using the assignment method of Start/End, set the start and end
addresses of the network module and the start address of the PLC side.
2048 points
POINT
(1) Make sure that the refresh range does not duplicate with other ranges used
(actual I/O, etc.) when setting the device range of the PLC side.
Master module
LY
0
to
7FF
1FFF
MELSEC-Q
CPU module
Y
0
to
7FF
5 - 21