6
CC-Link IE Field
Cyclical and
transient
transmission
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Data are essentially sent cyclically during communication. However, CC-Link IE Field also
offers acyclical communication, called transient transmission.
Cyclical communication is divided into a bit range (RX/RY) and a word range (RWr/RWw). The
PLC program can access the respective ranges by means of device assignment.
The BNI CIE Module also supports transient communication. This is always generated by the
master and enables access to the specific data range of the module.
CPU
module
Device
Link refresh
Device
Device
Link refresh
Device
Master-
station
RX
RWr
Link scan
RY
RWw
CIE
Module
RX
Sensor
RWr
RY
Actuator
Rww
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