External Fault

What does F00085 mean?

An external fault has been triggered, typically through a command input such as control word 2, bit 13. This indicates an issue originating outside the drive itself, requiring investigation of the external control logic or connected devices that are signaling the fault, which can stop the drive unexpectedly.

• A digital input (e.g., DI0, DI1) configured as 'External Fault' (via P0840, P0848) has been activated by an external device or safety circuit.
• External safety equipment (e.g., Emergency Stop button, safety gate interlock) has triggered the fault input via a connected relay contact.
• Wiring fault (e.g., short circuit to 0V or 24V supply, open circuit) on the digital input terminal configured for the external fault function.
• The PLC or master control system has intentionally set the 'External Fault' bit (e.g., control word 2, bit 13) in the drive's communication telegram.
• Drive parameter configuration incorrectly maps an active digital input signal to the 'External Fault' function unintentionally.

Click steps to track your progress.

1. 1

   1. Identify which digital input (e.g., DI0 on terminal 10, DI1 on terminal 11) is configured as the external fault source by checking parameters P0840-P0848.

2. 2

   2. Use a multimeter to measure the voltage on the identified digital input terminal to determine its current state (e.g., 24VDC active or 0VDC inactive).

3. 3

   3. Inspect the external wiring connected to the fault input for any shorts, opens, or loose connections that could falsely trigger the fault.

4. 4

   4. Review the status of external equipment (e.g., E-Stop buttons, safety switches) connected to the fault input for proper operation and contact status.

5. 5

   5. In the PLC program or master controller, verify the logic that controls the external fault bit in the drive's control word to ensure it's not being set unintentionally.

6. 6

   6. Temporarily disconnect the external fault input wire from the drive terminal and observe if the fault clears, indicating an issue with the external circuit.