Safe Stop Active

What does E37 mean?

This fault is triggered when the Safe Stop function is activated, indicating that a safety-related input (GS1/GS2) has been interrupted or commanded, initiating an immediate and safe shutdown of the motor output. The inverter explicitly signals this state to ensure safety compliance and prevent unintended motion.

• Emergency Stop (E-stop) button activation on the machine or control panel.
• Safety guard door open, safety light curtain interrupted, or other safety interlock activated, triggering a safety input (GS1/GS2).
• Faulty safety relay or safety PLC output driving the inverter's GS1/GS2 inputs.
• Wiring fault (e.g., broken wire, short to ground) on the safety input circuit to GS1/GS2 terminals.
• Incorrect configuration of the Safe Torque Off (STO) function or related safety parameters within the inverter.

Click steps to track your progress.

1. 1

   1. Identify and reset all activated safety devices (e.g., E-stops, light curtains, guard switches) in the system that could trigger Safe Stop.

2. 2

   2. Verify the continuity of the safety circuit to the GS1 and GS2 terminals of the inverter using a multimeter; expect continuity when the safety circuit is closed.

3. 3

   3. Check the status of any external safety relays or safety PLC outputs that control the inverter's safe stop inputs.

4. 4

   4. Inspect the wiring to the GS1 and GS2 terminals for damage, loose connections, or improper routing that could cause intermittent activation.

5. 5

   5. Review the inverter's safety function parameters (e.g., A5-01 Safe Torque Off mode) to ensure correct configuration according to the machine safety logic.