Mitsubishi Electric MELSEC Q Series User Manual page 240

(3) Buffer memory access
Buffer memory access is a method to access network module buffer memory from the user program. Buffer
memory data are refreshed with link device(s) and cyclic-transmitted to the other stations.
/* Data writing */
ret = QBF_ToBuf();
or
ret = mdSendEx();
ret = mdRandWEx();
ret = mdDevSetEx();
ret = mdDevRstEx();
/* Data read-out */
ret = QBF_FromBuf();
or
ret = mdReceiveEx();
ret = mdRandREx();
238
C Controller module
User program
Buffer memory access
CC-Link module
Link device
RX
RY
RWw
RWr
SB
SW
Buffer memory