Mitsubishi Electric MELSEC Q Series User Manual page 222

(2) Devices specified by functions (buffer memory)
Each link device is assigned to a certain address in the buffer memory.
In the dedicated function libraries, specify a device name defined for each function.
Link device
Remote input
Remote Link output
Remote register
Link special relay
Link special register
When any bus interface function is used, specify the buffer memory offset.
For buffer memory addresses compatible with each link device, refer to the following.
MELSEC-Q CC-Link IE Field Network Master/Local Module User's Manual
MELSEC-Q CC-Link System Master/Local Module User's Manual
For access to the other stations, refer to the following.
Page 223, Section 13.3.2
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Specified function device name
RX
RY
RWw
DevSPB
RWr
SB
SW