YASKAWA GA700 Series Technical Manual page 633

Figure 12.3 Holding Brake Open and Close Sequence Time Chart (V/f, CL-V/f, OLV)
*1 Start braking from the higher set frequency between b2-01 [DC Injection/Zero SpeedThreshold] or E1-09 [Minimum Output
Frequency].
Figure 12.4 Holding Brake Open and Close Sequence Time Chart (CLV, CLV/PM)
*1 Start braking from the higher set frequency between b2-01 [DC Injection/Zero SpeedThreshold] or E1-09 [Minimum Output
Frequency].
Notes on when Using Other Functions
Function
Stall Prevention during Deceleration
Auto-Tuning for Induction Motors
YASKAWA SIEPC71061705H GA700 Series Technical Manual
When you connect a braking resistor to discharge the regenerative power to the drive, set L3-04 = 0 [Stall Prevention during Decel
= Disabled].
Note:
If L3-04 = 1 [General Purpose], it is possible that the drive will not stop in the set deceleration time. Do not change the default
settings of these related parameters:
• L3-01 = 1 [Stall Prevention during Accel = Enabled]
• L3-05 = 1 [Stall Prevention during RUN = Deceleration Time 1 (C1-02)]
• When A1-02 = 2, 3, 4 [Control Method Selection = Open Loop Vector, Closed Loop Vector, Advanced Open Loop Vector], Auto-
Tune the motor before you operate the drive.
• Disconnect the drive from the motor to do Rotational Auto-Tuning.
• Auto-Tuning runs automatically for approximately 1 minute. Do not do Auto-Tuning with the motor engaged in the elevator
system.
Note:
• If you cannot disconnect the motor from the machine, do Stationary Auto-Tuning. During this time, the drive automatically
measures the necessary motor data. If the motor test report or the motor nameplate is not available, use Stationary Auto-Tuning.
Do Stationary Auto-Tuning for Line-to-Line Resistance for better torque characteristics at low speeds in the V/f Control mode.
• When you do Stationary Auto-Tuning, the drive energizes the motor and the motor stays stopped.
• To Auto-Tune a specialized motor, for example a wound motor, prepare a motor test report before Auto-Tuning and make sure
that the motor parameter E2-xx is not too different than the value in the test report.
12.2 A: Initialization Parameters
Precautions
12
633