External Trip Input Activated

What does Ext Trip mean?

This fault indicates that a digital input configured as an 'External Trip' has been activated, signaling that an external safety device or interlock has detected an abnormal condition. This is a generic trip initiated by an external system. The specific cause depends on what the external input monitors. It functions to prevent the drive from operating under unsafe external conditions, safeguarding both personnel and equipment.

• Activation of an external safety device (e.g., emergency stop button, safety light curtain, limit switch, thermal overload relay).
• Faulty external device (e.g., stuck contact, internal wiring short/open, sensor malfunction).
• Wiring fault between the external device and the VSD digital input (e.g., broken wire, loose connection, short to ground/supply).
• Incorrect VSD digital input configuration (e.g., input function P3-01, active state P3-02, filtering P3-03).
• Nuisance tripping due to electrical noise or transient voltages on the digital input signal line.

Click steps to track your progress.

1. 1

   Identify the specific external safety device connected to the VSD's 'External Trip' digital input. Manually verify its operational state.

2. 2

   Measure the voltage (e.g., 24VDC) or continuity across the VSD's digital input terminals when the external device is in its normal (non-tripped) state.

3. 3

   Inspect the wiring from the external device to the VSD digital input terminals for damage, loose connections, or incorrect termination.

4. 4

   Temporarily bypass the external device's input at the VSD terminal (e.g., jumper DI1 to GND if NPN, or to 24V if PNP) to isolate the fault to the device or wiring.

5. 5

   Review VSD parameters P3-01 (DI function = External Trip), P3-02 (active HIGH/LOW state), and apply input filtering (P3-03) if electrical noise is suspected.