Cyclic Transmission - Mitsubishi Electric AJ65BT-D75P2-S3 User Manual

1 PRODUCT OUTLINE

1.3.1 Cyclic transmission

This section explains cyclic transmission between the D75P2 and master module.
PLC CPU
2)
3)
5)
8)
Fig. 1.7 Cyclic transmission
(1) Remote input (RX)
1) The data of the remote input (RX) of the D75P2 are stored into the buffer
memory of the master module every link scan.
2) The input data stored in the master module are imported to the PLC CPU by
the FROM command or automatic refresh.
(2) Remote output (RY)
3) The data of the remote output (RY) of the D75P2 are written to the buffer
memory of the master module by the TO command or automatic refresh.
4) The output data stored in the master module are sent to the D75P2 every link
scan.
(3) Remote register (RWw)
5) The data of the remote register (RWw) of the D75P2 are written to the buffer
memory of the master module by the TO command or automatic refresh.
6) The transmission data stored in the master module are sent to the D75P2
every link scan.
(4) Remote register (RWr)
7) The data of the remote register (RWr) of the D75P2 are stored into the buffer
memory of the master module every link scan.
8) The reception data stored in the master module are imported to the PLC CPU
by the FROM command or automatic refresh.
Master module
Buffer memory
1)
Remote input
(RX)
Link scan
4)
Remote output
(RY)
Link scan
6)
Remote register
(RWw)
Link scan
7)
Remote register
(RWr)
Link scan
1 - 19
MELSEC-A
D75P2
Remote input
(RX)
Remote output
(RY)
Remote register
(RWw)
Remote register
(RWr)