How-To: Set Up Your MTZ High-Speed Motor and Control Panel to Increase Longevity

High-speed doors are built for demanding environments, logistics hubs, warehouses, manufacturing sites and high-traffic industrial entrances. But many motor failures don’t come from poor equipment. They come from an incorrect setup. 

One of the most common causes of premature motor failure is over-speeding the motor through inverter settings. 

Here’s what installers and maintenance teams need to know. 

The Most Common Failure for High-Speed Motors: Increasing Motor Hz Too Much 

A frequent attempt to improve door performance is simply increasing the inverter frequency (Hz) to make the door open faster. But this creates an unintended consequence. 

When Hz increases, motor torque decreases by as much as 30%. 

This means: 

• The motor has less pulling power 

• The system works harder to move the curtain 

• Mechanical stress increases 

• Motor temperature and wear increase 

• Lifespan is reduced 

• Brake components suffer additional strain 

  
  

So while the door may appear faster at first, long-term reliability is compromised. 

Faster is not always better. 

Critical Settings That Protect High-Speed Motor Life 

Correct parameter setup ensures smooth deceleration, reduces brake wear, and maintains motor torque. Below are recommended values that help prolong motor lifespan. 

Brake P.OP — -250 (Do not reduce further) 

This defines where the door begins slowing down when opening. 

This slowdown creates a soft stop, reducing impact on the motor and brake. Reducing this value too much causes harsh stops, which can damage the motor brake. 

Brake P.CL — 250 (Do not reduce further) 

This controls slowdown distance when closing. 

Again, this ensures a controlled, soft stop. Reducing the value increases brake stress and shortens component life. 

Speed Open — 50–60 Hz 

This is the opening speed setting. 

Important: 

• Torque begins dropping above 50 Hz 

• Higher speeds should only be used on lighter curtains 

  
  

For most installations, keeping speeds near 50 Hz preserves motor life. 

Speed Close — 25–35 Hz 

Closing speed can be increased if required, but: 

If you increase closing speed, you should also increase Brake P.CL to maintain proper slowdown distance. 

Soft Run OP — 25 Hz 

This is slowdown speed when opening. 

Heavy curtains or wind-bar doors may need slightly higher values because the curtain weight gathers at the top. 

Soft Run CL — 25 Hz 

Slowdown speed when closing. 

This value is normally suitable and rarely needs adjustment. 

If Your Door Struggles When Opening 

If the door appears to struggle in the open direction, avoid simply increasing speed. 

Instead: 

• Keep Speed Open close to 50 Hz 

• Do not change Boost Run Up or Boost Start parameters 

• Change Power parameter to 0 

  
  

This produces smoother operation without sacrificing motor life. 

Best Practice: Balance Speed and Reliability 

High-speed doors are designed for intensive operation, but reliability comes from correct configuration. 

Key principles: 

• Faster speeds reduce torque 

• Reduced torque increases strain 

• Increased strain shortens motor life 

• Correct slowdown settings protect brakes and motors 

Proper setup results in: 

✔ Longer motor life 

✔ Reduced service calls 

✔ Lower maintenance costs 

✔ Better long-term performance 

If a high-speed door isn’t performing correctly, the solution is rarely “more speed.” Correct parameter setup delivers both performance and durability.  A well-configured motor will always outperform an overdriven one.