OC6

What does 016 mean?

The drive is experiencing an I²xt overload, characterized by frequent and excessively long acceleration processes with motor overcurrent, or permanent motor overload where Imotor > Irmotor. This signals a prolonged motor overload condition.

• Frequent start/stop cycles or rapid reversals of the motor with high inertial loads, exceeding the motor's thermal capacity.
• Motor is undersized for the application's continuous torque demand or peak power requirements, leading to sustained high current.
• Reduced cooling efficiency of the motor due to obstructed fan, dirty cooling fins, or high ambient temperature, accelerating thermal buildup.
• Motor protection parameters (e.g., C0020 (Motor current) or C0030 (Overload factor)) are misconfigured, allowing excessive current for too long.
• Mechanical jamming or obstruction within the driven machine causing prolonged high-current operation.

Click steps to track your progress.

1. 1

   1. Monitor motor current (A) and motor temperature (if sensor present) during a full operational cycle and compare to motor nameplate data and thermal limits.

2. 2

   2. Verify the drive's motor data parameters (e.g., C0020 for motor rated current, C0021 for motor rated voltage) accurately match the motor nameplate.

3. 3

   3. Increase the motor acceleration and deceleration times (e.g., C0026, C0027) to reduce peak currents during transient operations, if the process allows.

4. 4

   4. Inspect motor cooling fins and fan for cleanliness and obstructions. Ensure proper airflow around the motor and within its terminal box.

5. 5

   5. Use a clamp meter to measure actual motor phase currents for unbalance, which can indicate mechanical issues or motor winding problems.