Mitsubishi Electric MELSEC-Q Series User Manual page 30

1.1 CC-Link IE Field Network
CC-Link IE Field Network is a high-speed and large-capacity open field network that is based
on Ethernet technology (1000BASE-T).
(1) Data communication
CPU module
High-speed and large-capacity data communication is available between a master
station and slave stations on CC-Link IE Field Network.
(a) Periodic communication (cyclic transmission)
Data is periodically communicated among stations within the same network.
(Refer to Section 8.3.)
Master station
(QD77GF)
Master
station
X RX
Y RY
RWw
W
RWr
Internal
memory
(b) Irregular communications (transient transmission)
Data is communicated upon request. (Refer to Section 8.4.)
CPU module
Command
Instruction
Device
1234H
Servo Servo
amplifier amplifier
Servo Servo
amplifier amplifier
Internal Internal
memory memory
Master station
Write
request
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Chapter 1 CC-LINK IE FIELD NETWORK
Intelligent
device station
Intelligent
device station
RX
RY
RWw
RWr
Intelligent
device station
Device
1234H
Intelligent
device station
Intelligent
device station
RX
RY
RWw
RWr