ProSoft Technology MVI69-DFNT - Manual (Page 117)

MVI69-DFNT ♦ CompactLogix or MicroLogix Platform Reference
EtherNet/IP Client/Server Communication Module User Manual
ProSoft Technology, Inc. Page 117 of 167
May 14, 2014
5.3.2 ControlLogix (CLX) Processor
In order to exchange data between a ControlLogix processor and the module, the
MSG instruction is used. There are two basic methods of data transfer supported
by the module when using the MSG instruction: Encapsulated PCCC messages
and CIP Data Table messages. Either method can be used, and the selection is
left to the application developer.
Encapsulated PCCC Messages
PLC5 and SLC5/05 processors containing an Ethernet interface use the
encapsulated PCCC message method. The module simulates these devices and
accepts both read and write commands. The following topics describe the
support for the read and write operations.
Encapsulated PCCC Write Message
Write commands transfer data from the ControlLogix processor to the module.
The following encapsulated PCCC commands are supported from a ControlLogix
Processor:
 PLC2 Unprotected Write
 PLC5 Typed Write
 PLC5 Word Range Write
 PLC Typed Write
An example rung used to execute a write command is shown in the following
diagram: