Mitsubishi Electric MELSEC iQ-R Series User Manual page 22

• Listen Only is a connection for the target of which connection such as Exclusive Owner and Input Only that
is set for multicast communications is already opened. It can receive only multicast-type data sent to the
RJ71EIP91.
• The connection of Listen Only cannot be opened when the connection such as Exclusive Owner and Input
Only that is set for multicast communications is not opened.
• Even when communications are performed normally with the target that is opened using Listen Only, the
data receiving will be stopped if all the communications with other originators that are opened using the
connection such as Exclusive Owner and Input Only that is set for multicast communications.
Instance ID
The instance ID is a number that indicates an EtherNet/IP device and is specified when the EtherNet/IP communication
connection is established.
With settings from the RJ71EIP91, the instance ID is not specified. Instead, the connection number is specified to determine
the target.
Communication timing
Class1 instance communications are performed at the RPI interval set with the RJ71EIP91 on the scanner side.
The RPI can be set for each connection.
Cyclic, Application Trigger, or Change of State can be selected for the communication trigger type. ( Page 79
[Connections] tab)
1 FUNCTIONS
20
1.1 EtherNet/IP Communication Functions