Operation
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Figure 6.2
–
Internal Mapping from ControlNet Originator to EtherNet/IP
6.2.2.
E
XPLICIT
M
ESSAGING
When using the ControlNet Explicit Messaging, the user can configure up to 10 ControlNet
devices which will be used for the Explicit Messaging. This configuration is located in the
ControlNet Devices
tab. Following this, the ControlNet Map of explicit messages needs to be
configured. The Explicit Messaging uses the internal data space (IDS) which is size where data
can be stored for exchanges between the explicit ControlNet devices and the Ethernet
network.
The Input and Output IDS Offset is where the Explicit ControlNet device data will be read from
or written to. The data in the IDS can then, in turn, be copied to or from, the Ethernet network
using the Internal Map in the configuration.
In the example below, the ControlNet Router is receiving data from a Logix controller on
EtherNet/IP, copying 4 bytes from the Class 1 EtherNet/IP Output assembly to the Internal
Data Space at address 5030.