Operation
Page 125 of 178
Figure 6.8
–
Internal Mapping from EtherNet/IP Originator to ControlNet
6.4.2.
E
XPLICIT
M
ESSAGING
When using the EtherNet/IP Explicit Messaging, the user can configure up to 10 EtherNet/IP
devices which will be used for the Explicit Messaging. This configuration is located in the
EtherNet/IP Devices
tab. Following this, the EtherNet/IP Map of explicit messages needs to be
configured. The Explicit Messaging uses the internal data space (IDS) where data can be stored
for exchanges between the explicit EtherNet/IP devices and the ControlNet network.
The Input and Output IDS Offset is where the Explicit EtherNet/IP device data will be read
from, or written to. The data in the IDS can then, in turn, be copied to or from the ControlNet
network using the Internal Map in the configuration.
In the below example, the ControlNet Router is receiving data from a Logix controller on
ControlNet, copying 4 bytes from the Scheduled ControlNet Output assembly to the Internal
Data Space at address 4080.