C2: S-Curve Characteristics - YASKAWA FSDrive-MV1000 Parameter Manual

C1-09: Fast Stop Time
■
Parameter C1-09 sets a special deceleration that is used when certain faults occur or that can be operated by closing a
contact input configured as H1-
continuously, even a momentary closure will trigger the Fast Stop operation. Unlike standard deceleration, once the Fast
Stop operation is initiated, the drive cannot be restarted until the deceleration is complete, the Fast Stop input is cleared,
and the Run command is re-input.
A contact output programmed for "During Fast Stop" (H2-
A Fast Stop can be selected as the action the drive should take when certain faults occur, such as L8-03 (Overheat Pre-
Alarm Operation Selection).
No. Parameter Name
C1-09 Fast Stop Time
<1> The setting range for the acceleration and deceleration times is determined by the acceleration/deceleration time setting units in C1-10.
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.
Note: Rapid deceleration can trigger an overvoltage fault. When a fault occurs, 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.
■ 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.
No.
Accel/Decel Time Setting
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 1: 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.

◆ C2: S-Curve Characteristics

Use S-curve characteristics to smooth acceleration and deceleration and to minimize abrupt shock to the load. Set S-
curve characteristic time during acceleration/deceleration at start and acceleration/deceleration at stop. If the STo fault
(Hunting Detection) occurs when starting a PM motor, try increasing the value set to C2-01.
C2-01 to C2-04: S-Curve Characteristics
■
C2-01 through C2-04 set separate S-curves for each section of the acceleration or deceleration.
No.
C2-01
C2-02
C2-03
C2-04
<1> For details on the default settings, refer to
YASKAWA ELECTRIC EZZ010930 FSDrive-MV1000 Parameter Guide
= 15 (N.O. input) or 17 (N.C. input). The input does not have to be closed
0.0 to 6000.0 s
Name
0, 1
Units
Parameter Name
S-Curve Characteristic at Accel Start
S-Curve Characteristic at Accel End
S-Curve Characteristic at Decel Start
S-Curve Characteristic at Decel End
Control Mode Dependent Parameter Default Values on page
= 4C) will be closed as long as Fast Stop is active.
Setting Range
<1>
Setting Range
2.3 C: Tuning
Default
120.0 s
Default
1
Setting Range
Determined by A1-02
0.00 to 10.00 s
79.
Default
<1>
0.20 s
0.20 s
0.00 s
125