Safety Function Fault

What does SAFF mean?

A general safety function fault. This indicates that a critical safety-related event or malfunction has occurred, leading to a safe stop or shutdown. The specific cause requires further investigation of safety registers like SFFE or SAF1 for detailed information. This is a high-priority fault requiring careful investigation.

• External safety circuit (e.g., E-Stop, safety gate interlock) opened or detected as faulty.
• Internal safety relay or monitoring circuit failure (e.g., detected by self-test, parameter P2-10).
• Mismatch between dual-channel safety inputs (e.g., input X1 and X2 in different states, parameter P2-12).
• Incorrect configuration of safety parameters (e.g., STO, SLS functions, parameters in safety menu).

Click steps to track your progress.

1. 1

   1. Verify the status of external safety inputs on terminals (e.g., STO_IN1, STO_IN2) using a multimeter (24VDC expected).

2. 2

   2. Inspect all external safety devices (e.g., E-Stop buttons, safety light curtains) for physical damage or wiring faults.

3. 3

   3. Access the drive's safety menu (e.g., Parameter P2-00 to P2-99) and check specific diagnostic messages.

4. 4

   4. Perform a controlled test of each enabled safety function (e.g., STO, SLS) as per commissioning guidelines.

5. 5

   5. Measure resistance between safety input terminals and ground to detect insulation breakdowns.