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Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
Chapter 3
CGCM-DLR Unit Operation
Com 1 Redundancy Port
The redundancy port lets one CGCM-DLR unit communicate with its partner
CGCM-DLR unit in a redundant system, which lets the partner unit auto-track
the primary unit control modes.
EtherNet/IP Network Port
The EtherNet/IP DLR network ports are used to interface with a Logix family
programmable logic controller. Through these ports, the Logix Designer
application facilitates setting CGCM-DLR unit configuration parameters.
Control, metering, and protection settings are communicated to the
CGCM-DLR unit by using these ports. The CGCM-DLR unit firmware is
update programmable through these ports.
Software Inputs and Outputs
Your Logix family host programmable controller must include the hardware and
communication interfaces with the generator, prime mover, power system, and
balance of plant that are not included in the CGCM-DLR unit module. The
software interface between the CGCM-DLR unit and its host controller is made
via the EtherNet/IP network interface. The specific interface consists of several
Assembly Instances, or data tables:
•
The Input (Scheduled Read) table provides time-critical status and fault
parameters, and control commands, from the CGCM-DLR unit to the
host Logix controller.
•
The Output (Scheduled Write) table provides time-critical enable
commands, selection commands, and setpoints from the host controller to
the CGCM-DLR unit.
•
The Unscheduled Read table provides non-time critical metering data
from the CGCM-DLR unit to the host controller.
•
The Unscheduled Write table provides a means to adjust selected gains
and energy counter-presets while excitation is enabled.
•
The Configuration table contains the basic CGCM-DLR unit
configuration parameters. The configuration is automatically transferred
from the host controller to the CGCM-DLR unit on powerup and at
other times when excitation is not enabled.
See
CGCM-DLR Unit Software Interface
, for more detailed
information on the CGCM-DLR unit software interface.