2 EtherNet/IP Communication (Adapter)
4-10
KW2D Series Smart RFID Reader User’s Manual
■
Listen Only
This CIP connection cyclically receives data for originators from a target that already has a multicast type CIP
connection using Exclusive Owner or Input Only opened. Set this connection type to simultaneously receive data when
the target transmits that data by multicast to other originators. The CIP connection point is specified as an instance
ID. Communication is performed at the cycle (RPI) specified when the CIP connection is opened. In order for the
target to perform alive monitoring of the originator, a heartbeat that does not include data is cyclically transmitted
from the originator to the target.
The originator specifies the Listen Only instance ID (199) on the target as the destination for the heartbeat. The
heartbeat is transmitted at the specified cycle (RPI).
•
For Listen Only, please set the CIP connection point of the input data to receive from the target as an
instance ID.
•
The heartbeat is always performed in Listen Only.
Originators that opened multicast type
CIP connection to target
Originator B
(Host device B)
Originator A
(Host device A)
CIP Connection
Transmit heartbeat
in regular cycle
Target
(KW2D Series Smart RFID Reader)
Instance ID: 199
Multicast Transmission
Instance ID: 100
Originator C
(Host device C)
CIP Connection
Listen Only
CIP Connection