118 Rockwell Automation Publication 2097-UM002D-EN-P - April 2017
Chapter 7 Troubleshoot the Kinetix 350 Drive
Table 51 - nF xx Fault Codes
Four-digit Display
RSLogix 5000 and Logix
Designer Fault Message
Problem or Symptom Potential Cause Possible Resolution
nF 01 Control Update Fault
Several consecutive updates from the controller
have been lost.
Excessive network traffic.
• Remove unnecessary network devices
from the motion network.
• Change the network topology so that
fewer devices share common paths.
• Use faster/higher performance
network equipment.
Noisy environment.
• Segregate signal wiring from power
wiring.
• Use shielded cables.
• Add snubbers to power devices.
nF 02 Processor Watchdog Fault The watchdog-circuit monitoring processor operation detected a problem.
• Recycle control power or reset the
drive.
• Replace control module if problem
persists.
nF 03 Hardware Fault
The drive has an internal hardware problem.
• Recycle control power or reset the
drive.
•Replace drive.
Nonvolatile write or write to memory failed. Faulty memory component.
• Recycle control power or reset the
drive.
• Replace drive if problem persists.
nF 04 Data Format Error
A data format error was discovered in the
controller-to-drive message.
Faulty memory component.
• Recycle control power or reset the
drive.
• Replace control module if problem
persists.
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