118 Rockwell Automation Publication 2097-UM002C-EN-P - December 2013
Chapter 7 Troubleshoot the Kinetix 350 Drive
Table 49 - nF xx Fault Codes
Four-digit Display
RSLogix 5000
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.
