Introduction - Allen-Bradley 1407-CGCM-DLR User Manual

Introduction

Table 19 - Excitation Control - FCR
Symptom
No excitation current output
Excitation output is less than
setpoint
Troubleshooting
This chapter lists suggested diagnostic and corrective action procedures for
various common generator system malfunctions. If the suggested actions do not
resolve the anomaly, contact Rockwell Automation technical support.
Information on Rockwell Automation support can be found on the back cover.
This chapter does not include procedures to diagnose or correct issues that are
related to the basic communication between the CGCM-DLR unit and its host
Logix controller.
For assistance in the diagnosis of EtherNet/IP® DLR network communication
issues, refer to the EtherNet/IP Network Configuration Manual, publication
ENET-UM001
Pub. 148 and EtherNet/IP Network Infrastructure Guidelines ODVA Pub. 35
Most Likely Cause
Excitation is not enabled
Wiring error
No supply/PMG power
FCR not selected/enabled
Wiring error
Insufficient supply power
Field resistance too great
Gain mis-adjusted
(1) For ODVA publications, see the ODVA EtherNet/IP library at
http://odva.org/Home/ODVATECHNOLOGIES/EtherNetIP/EtherNetIPLibrary/tabid/76/lng/en-US/Default.aspx
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
or EtherNet/IP Media Planning and Installation Manual ODVA
Diagnostic Action
Check excitation enable (hardware
and software) and FCR select
Check wiring for excitation enable,
excitation current output, fuses
open, grounding, and PMG/supply
Measure Voltage at CGCM-DLR unit
PMG/supply input terminals
Check excitation enable (hardware
and software) and FCR select
Check wiring for excitation enable,
excitation current output, fuses
open, grounding, and PMG/supply
Measure Voltage at CGCM-DLR unit
PMG/supply input terminals
Disconnect field current outputs at
CGCM-DLR unit and measure load
resistance
Check gains that are entered into
CGCM-DLR unit configuration
Chapter
Corrective Action
Correct Logix controller logic or I/O
as required
Correct wiring as required
Correct supply anomaly if
insufficient voltage is measured
Correct Logix controller logic or I/O
as required
Correct wiring as required
Correct supply anomaly if
insufficient voltage is measured
Correct/verify load resistance is
within CGCM-DLR unit capability
Calculate/adjust as required
7
(1)
.
163