EN Comm Loss
Allen-Bradley · PowerFlex 520-series Adjustable Frequency AC Drive
What does F083 mean?
Internal communications between the drive's main controller and its embedded EtherNet/IP adapter have been interrupted. This is a fault internal to the drive's architecture, distinct from external network issues, signifying a failure in the communication path that prevents the drive from interacting with the Ethernet network. The drive's response is governed by parameter C125 [Comm Loss Action].
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Review the drive’s internal Ethernet diagnostic parameters for specific error indicators.
- 4
Consider modifying parameter C125 [Comm Loss Action] to adjust the drive's behavior upon internal communication loss (e.g., coast, ramp to stop, continue last command).
- 5
If the fault persists, replace the Ethernet wiring (internal connections if accessible), the Ethernet switch (if connected directly), or the control module.