Controller Overload (Steady-State)

What does OC5 mean?

The controller is experiencing frequent or prolonged overload periods during steady-state operation, indicating the drive is undersized for the continuous load. Continuous operation beyond the drive's rated capacity will lead to overheating and significantly reduce its lifespan, potentially causing premature failure.

• Drive is undersized for the continuous mechanical load of the application, leading to sustained high current.
• Motor operating continuously above its nominal current for extended periods.
• Application load is consistently higher than anticipated during drive sizing.
• Motor current limits (e.g., P1-54, P1-55) set too high, allowing motor to pull excessive current.
• Inefficient mechanical transmission (e.g., worn bearings, misaligned shafts) increasing the required motor torque.

Click steps to track your progress.

1. 1

   1. Monitor the actual motor current (e.g., via display parameter C0004) during steady-state operation and compare it to the drive's nominal output current.

2. 2

   2. Verify that the drive's continuous current rating and nominal power are appropriate for the application's continuous load requirements.

3. 3

   3. Check the setting of current limit parameters (e.g., P1-54, P1-55) to ensure they are within the drive's safe operating envelope.

4. 4

   4. Investigate the mechanical system for sources of increased load such as worn gears, seized bearings, or binding components.

5. 5

   5. Consider oversizing the drive if the application load cannot be reduced.