Network Fault

What does CnF mean?

This read-only fault code indicates a communication problem on an installed option card (e.g., a communication card). The exact nature of the fault depends on the specific network card. It means the drive cannot communicate correctly over the specified network, leading to a loss of external control, monitoring, or parameter access via that network.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Cycle power to the drive to attempt a reset of the communication card and clear the fault.

2. 4

   Verify the network cable connections and termination on the option card.