SLLA665 April   2025 MCF8315A , MCF8315C , MCF8315C-Q1 , MCF8315D , MCF8316A , MCF8316C-Q1 , MCF8316D , MCF8329A , MCF8329A-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Open Loop and Handoff Stage
  5. 2EEPROM Configurations Affecting Open Loop to Closed Loop Handoff
  6. 3Open Loop to Closed Loop Handoff Tuning
    1. 3.1 Experimental Way to Tune Open Loop and Handoff Stage
      1. 3.1.1 Step-1: Initial Configuration
      2. 3.1.2 Step-2: Tuning of Parameters In Case Handoff is not Proper
        1. 3.1.2.1 Tuning of OL_ILIMIT
        2. 3.1.2.2 Tuning of Open Loop Acceleration Co-Efficient A1
        3. 3.1.2.3 Tuning of Handoff Thresholds
      3. 3.1.3 Step-3: Tuning of Handoff Configurations
  7. 4Optimum Handoff
    1. 4.1 Open Loop Time With the Recommended Settings
    2. 4.2 Open Loop Time by Following Optimum Handoff Steps
  8. 5Summary
  9. 6References

3.1.2.3 Tuning of Handoff Thresholds

The recommendation is to not set OPN_CL_HANDOFF_THR to a very high value, as the set OL_ILIMIT on occasion is not sufficient to reach the set speed. For MOTOR1, if OPN_CL_HANDOFF_THR is set to 50%, the motor is not able to reach the 50% of maximum speed with the given OL_ILIMIT and Acceleration coefficient OL_ACC_A1. So, the handoff fails in this scenario. In that case, set handoff threshold to a lower value.

Handoff Fails with OPN_CL_HANDOFF_THR = 50% Figure 3-5 Handoff Fails with OPN_CL_HANDOFF_THR = 50%