Brake Tripped on Fault or Not Engaged

What does Brk Fault mean?

This fault indicates that the mechanical brake has either tripped due to a fault (e.g., not releasing during start/run) or failed to engage during a stop command. This is critical in applications requiring load holding, such as hoisting. If the brake does not engage or release correctly, it can lead to uncontrolled load movement, posing significant safety risks and potential equipment damage.

• Mechanical obstruction preventing brake release or engagement.
• Brake coil short circuit or open circuit.
• Brake rectifier unit (if external DC brake) failure.
• Incorrect brake control timing parameters (e.g., P4-01 (Brake Release Delay), P4-02 (Brake Engage Delay)).
• Faulty brake feedback switch (if equipped) not indicating correct brake status.

Click steps to track your progress.

1. 1

   Inspect the mechanical brake for visible damage, wear, or foreign material preventing operation.

2. 2

   Measure resistance of the brake coil to verify it is within specification (e.g., 200 Ohms for a 24VDC coil).

3. 3

   Verify brake control signals and power supply voltage to the brake (e.g., measure voltage at brake terminals).

4. 4

   Adjust brake timing parameters, such as P4-01 (Brake Release Delay) or P4-02 (Brake Engage Delay), to ensure adequate time for operation.

5. 5

   Check the wiring and functionality of any brake feedback switches.