External Fault at Terminal S5

What does EF5 mean?

This fault is triggered when an external condition connected to multi-function digital input terminal S5 activates the Drive's external fault function, causing the Drive to stop. It indicates an issue with the external device or process monitored by S5, which could lead to machine downtime or safety risks if misidentified.

• The external device linked to terminal S5 (e.g., over-temperature sensor, oil level switch) has transitioned to its fault state.
• Integrity issue with the wiring from the external sensor to terminal S5 (e.g., short to ground, open circuit).
• Parameter H1-05 (S5 function selection) is configured incorrectly, leading to an unexpected fault trigger based on the input signal.
• Voltage fluctuations or electrical transients affecting the signal on S5, causing an erroneous fault detection.
• Mechanical or electrical failure of the external switch or sensor connected to S5.

Click steps to track your progress.

1. 1

   Visually inspect the external sensor or switch connected to S5 and its immediate environment for physical damage or abnormal conditions.

2. 2

   Use a digital multimeter to verify the voltage level at terminal S5 against SN (common) and compare it to the expected fault state.

3. 3

   Review parameter H1-05 (S5 function selection) to ensure it is set for 'External Fault' and correctly matches the sensor's output logic.

4. 4

   Trace the wiring from S5 to the external device, checking for secure connections at terminal blocks and verifying cable continuity.

5. 5

   If possible, simulate the non-fault condition at the external device's output to see if the fault clears on the Drive.