Anti-slippage Operation Time Limit Exceeded

What does 25 mean?

This error occurs when the lift fails to receive any leveling signal within the specified time limit defined by parameter F62. The default time limit is 32 seconds, with a configurable range between 20 and 45 seconds according to GB7588-2003. A prolonged absence of leveling signals indicates a failure in position detection during car movement, potentially due to slippage.

• The lift fails to receive a leveling signal within the time set by parameter F62.
• Actual slippage of the car, where the measured slippage distance error exceeds 5mm.
• Incorrect car decoration weight or an unbalanced load affecting the balance coefficient.
• Malfunctioning or misaligned leveling switches or plates.
• Overshoot in the speed regulator preventing proper leveling.

Click steps to track your progress.

1. 1

   Verify the value of parameter F62 (Time limit for anti-slippage operation); ensure it is within the 20-45 second range and appropriately set for the application.

2. 2

   Inspect and adjust the position of leveling switches and plates if the leveling deviation exceeds 15mm.

3. 3

   Review and verify the car's current balance coefficient, especially if car decoration has been completed or modified, and adjust if necessary.

4. 4

   For high-speed elevators experiencing persistent slippage, consider installing an encoder at the governor side for main-board position feedback.

5. 5

   Adjust parameter F24 to 2 (Analog with creep) or 0 (Multi-speed operation) to absorb slippage errors by creeping.

6. 6

   Check the leveling insert plate length consistency; the flashboard on the second floor is the benchmark for other floors, ensuring they are identical.