User manual

Publication ENET-UM001I-EN-P - January 2010 107
Interlocking and Data Transfer Between Controllers Chapter 7
Enter Message Logic
To send or receive data from an EtherNet/IP module via a message, you must
program a MSG instruction in the local controller’s logic. If the target module
is configured in the I/O Configuration folder of the controller, browse to
select the module or manually enter the message path in the MSG instruction.
Add the EtherNet/IP Module to the Local Controller’s I/O
Configuration
To use the Browse button to select the target device of a MSG instruction, add
that remote device to the I/O Configuration folder of the local controller.
Within the I/O Configuration folder, organize the local and remote devices
into a hierarchy of tree/branch, parent/child.
For a typical local/remote MSG structure,
such as the one shown below,
you build the I/O configuration with the following steps.
1. Add the local communication
module for the local controller.
2. Add the remote communication module for the remote controller.
IMPORTANT
The number of TCP and CIP connections supported by the
1768-ENBT module depends on the firmware revision you are
using. If you are using firmware revision 1.x, the module
supports 32 TCP connections and 64 CIP connections. If you are
using firmware revision 2.x or later, the module supports 64 TCP
connections and 128 CIP connections.
Local
Communication
Module
Local
Controller
Remote
Controller
Remote
Communication
Module