YASKAWA GA500 Maintenance & Troubleshooting page 262

6.5 Auto-Tuning
■
Precautions before Stationary Auto-Tuning for Line-to-Line Resistance and Stator
Resistance Auto-Tuning
In V/f control, when the motor cable is 50 meters (164 feet) or longer, do Stationary Auto-Tuning for Line-to-Line
Resistance.
WARNING! Electrical Shock Hazard. During Auto-Tuning, the motor will receive high voltage when the motor is stopped. Do not
touch the motor until Auto-Tuning is complete. If you touch a motor that is energized, it can cause serious injury or death.
■
Precautions before Using Deceleration Rate Tuning and KEB Tuning
Before Deceleration Rate Tuning or KEB Tuning, check these items:
Note:
• Do not do Deceleration Rate Tuning if you use a braking resistor unit or a regenerative converter.
• Do Deceleration Rate Tuning and KEB Tuning with the load attached to the motor.
• Do not do Deceleration Rate Tuning or KEB Tuning for these applications:
In Deceleration Rate Tuning and KEB Tuning, the drive will automatically rotate the motor forward and accelerate and decelerate the motor
again and again.
–On a machine that does not let the motor rotate forward
–In applications with a small range of operation (trolleys and other such applications that can only move linearly)
–Applications where sudden acceleration and sudden deceleration are not applicable.
• To do KEB Tuning with the external main circuit capacitors connected to the drive, set L3-26 [Additional DC Bus Capacitors] then do KEB
Tuning.
• Do not do KEB Tuning or Deceleration Rate Tuning if the drive is set to use H1-xx = 16 [MFDI Function Select = Motor 2 Selection].
Failure to obey can cause an ov [Overvoltage] fault.
262 YASKAWA TOEPYAIGA5001A GA500 DRIVE MAINTENANCE & TROUBLESHOOTING