YASKAWA OYMC V1000, Programming Manual

Page: 80 / 408

1.3 C: Tuning
80 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
NOTICE: Rapid deceleration can trigger an overvoltage fault. When faulted, the drive output shuts off, and
the motor coasts. To avoid this uncontrolled motor state and to ensure that the motor stops quickly and
safely, set an appropriate Fast Stop time to C1-09.
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C1-10: Accel/Decel Time Setting Units
Determines the units for the acceleration and deceleration times set to C1-01 through C1-09
using parameter C1-10.
Setting 0: 0.01 s Units
The accel/decel. times are set in 0.01 s units. The setting range will be 0.00 to 600.00 s. If
any of the parameters C1-01 to C1-09 is set to 600.1 seconds or more, then C1-10 cannot be
set to 0.
Setting 0: 0.1 s Units
The accel/decel. times are set in 0.1 s units. The setting range will be 0.0 to 6000.0 s.
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C1-11 Accel/Decel Switch Frequency
Sets the switching frequency for automation accel/decel. time change over. Refer to
Switching Acceleration and Deceleration Times by a Frequency Level on page 78
Note: Setting C1-11 to 0.0 Hz disables this function.
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C2: S-Curve Characteristics
Using S-curve characteristics to smooth acceleration and deceleration minimizes abrupt
shock to the load. If a STo fault (Hunting Detection 2) occurs when starting a PM motor, try
increasing the value set to C2-01.
No.
<1> The setting range for the acceleration and deceleration times is determined by C1-10 (Accel/Decel Time Setting
Units). For example, if the time is set in units of 0.01 s (C1-10 = 0), the setting range becomes 0.00 to 600.00 s
Parameter Name Setting Range Default
C1-09 Fast Stop Time 0.0 to 6000.0 s
<1>
10.0 s
No. Parameter Name Setting Range Default
C1-10 Accel/Decel Time Setting Units 0 or 1 1
No. Parameter Name Setting Range Default
C1-11 Accel/Decel Switch Frequency 0.0 to 400.0 Hz 0.0 Hz