Ramp/timeout

What does F34 mean?

The drive did not reach the start/stop speed within a specified time period, indicating that the set ramp is too short for the actual load or the drive system's capabilities. This can lead to uncontrolled stopping or startup, potentially causing mechanical stress or safety issues.

• Acceleration/deceleration ramp time (e.g., P1-08, P1-09) set too short for the mechanical load inertia.
• Motor or mechanical system is overloaded, preventing it from reaching commanded speed (e.g., current >150% rated).
• Mechanical binding or excessive friction in the driven equipment (e.g., seized bearings, obstructed movement).
• Insufficient motor torque due to incorrect motor parameters (e.g., P1-01 rated power) or low supply voltage.
• Encoder feedback not working correctly, causing the drive to misinterpret motor speed (e.g., no pulses, incorrect scaling P7-02).

Click steps to track your progress.

1. 1

   1. Increase the acceleration ramp time (P1-08) and/or deceleration ramp time (P1-09) by 50% and re-test the system.

2. 2

   2. Monitor motor current (P0-03) during acceleration/deceleration to check for overload conditions (e.g., sustained >100% rated current).

3. 3

   3. Disconnect the motor from the mechanical load and run it unloaded to see if the fault persists, isolating the mechanical system.

4. 4

   4. Verify all motor nameplate data (e.g., P1-01 rated power, P1-02 rated voltage, P1-03 rated current) are correctly entered in drive parameters.

5. 5

   5. If using a speed encoder, verify its feedback signal (e.g., via diagnostic parameters P7-03) and check for continuity of wiring to drive terminals.