ProSoft Technology PLX31-EIP-SIE - Manual (Page 89)

PLX3x Series EIP Protocol
Ethernet and Serial Gateways User Manual
ProSoft Technology, Inc. Page 89 of 218
September 17, 2014
CIP Data Table Operations
This method of data transfer uses CIP messages to transfer data between the
ControlLogix or CompactLogix processor and the gateway. Tag names define the
elements to be transferred. The following topics describe the support for the read
and write operations.
CIP Data Table Write
CIP data table write messages transfer data from the processor to the gateway.
An example rung used to execute a write command is shown in the following
diagram:
The MESSAGE CONFIGURATION dialog box must be completed to define the
data set to be transferred from the processor to the gateway. An example of the
dialog box follows:
Complete the dialog box for the data area to be transferred. CIP Data Table
messages require a tag database element for both the source and destination.
The SOURCE TAG is a tag defined in the Controller Tag database. The
DESTINATION ELEMENT is the tag element in the gateway.
The gateway simulates a tag database as an array of elements defined by the
maximum register size for the gateway (user configuration parameter "Maximum
Register" in the [Gateway] section) with the tag name INT_DATA.