Option Card External Fault

What does EF0 mean?

This fault indicates that the communication option card has received an external fault signal from the connected controller or that there is a programming error on the controller side. It can cause the motor to stop according to the drive's stop method settings.

• External fault input terminal on the option card is active, signaling a fault from a connected device.
• Programming error in the connected controller (e.g., PLC) causing an incorrect fault signal output to the option card.
• Damaged or improperly shielded wiring connecting the external fault source to the option card's input.
• Fault in the option card hardware itself, incorrectly interpreting a signal as a fault.
• Power supply issue to the external device or controller providing the fault signal to the option card.

Click steps to track your progress.

1. 1

   1. Identify the specific digital input terminal on the communication option card configured for external fault.

2. 2

   2. Measure the voltage level at the identified external fault input terminal on the option card (e.g., 24VDC or 0VDC).

3. 3

   3. Verify the logic of the external fault signal source (e.g., PLC output) to ensure it is not erroneously active.

4. 4

   4. Disconnect the external fault wiring from the option card and observe if the EF0 fault clears.

5. 5

   5. Check for proper grounding and shielding of the control wiring connected to the option card.

6. 6

   6. Replace the communication option card if no external cause is identified and the fault persists.