Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
139
Chapter
6
CGCM-DLR Unit Software Interface
Introduction
This chapter provides information on communication with the CGCM-DLR
unit by using the EtherNet/IP® Device Level Ring (DLR) network. It discusses
scheduled and unscheduled messaging between a ControlLogix® controller and
the CGCM-DLR unit and touches briefly on the user program communication
interface.
The
provides an overview of the module-
defined Data Types that are created in the ControlLogix controller when a
CGCM-DLR Add-on Profile is instantiated.
Other tables display the content and format of the Data Types in greater detail.
CGCM-DLR Unit Data Table Summary
This table summarizes what information the data tables provide.
Table 5 - Summary of Data Tables
Name
Firmware
Revision
Data Access
Module-defined Data Type
Assembly
Instance
Size
(Bytes)
See Page
Input (Scheduled Read)
5.x
R
AB:1407_CGCM:I:0
2
76
Output (Scheduled Write)
5.x
R/W
AB:1407_CGCM:O:1
1
56
Unscheduled Read
5.x
R
AB:1407_CGCM: Unscheduled_Read3
5
172
Unscheduled Write
5.x
W
AB:1407_CGCM: Unscheduled_Write3
6
64/76
Configuration
5.x
W
AB:1407_CGCM:C:2
4
944
(1)
Configuration Read
5.x
R
AB:1407_CGCM_Configuration_Read
4
344
(1) The AB:1407_CGCM:C:2 data type reports a size of 944 bytes, which includes the Configuration (352), Unscheduled Write (76), Unscheduled Read (172), Configuration Read (344)
data types, and two unused DINTs (8 bytes). The Unscheduled Read, Configuration Read, and two unused DINTs are not visible to the user within the AB:1407_CGCM:C:2 data type.
When an unscheduled read of instance 4 to destination AB:1407_CGCM_Configuration_Read data type is performed, 344 bytes are read.