Communication Network Interruption

What does CnF mean?

Indicates an interruption in communication with an NET option card. The fault code remains saved even if the cause disappears and is reset only after a power cycle. This prevents remote control or monitoring, leading to a loss of control over the connected equipment.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Power cycle the drive to attempt to reset the communication fault code.

2. 4

   Consult the specific network card manual for detailed troubleshooting network-related issues.

3. 5

   Verify network parameters in the drive and the network master device for correct settings.