No. Parameter Name Description Setting Range Default
C1-10 Accel/Decel Time Setting Units
Sets the setting resolution of C1-01 to C1-09.
0: 0.01 s (0.00 to 600.00 s)
1: 0.1 s (0.0 to 6000.0 s)
0, 1 1
<1> The parameter can be changed during run.
<2> 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
WARNING! Sudden Movement Hazard. Rapid deceleration may cause the drive to fault on an overvoltage condition, resulting in death or serious injury due to an uncontrolled
motor state. Set an acceptable deceleration time in parameter C1-09 when using the Fast-stop feature.
n
Accel/Decel Time Setting Units
Set the units for the acceleration and deceleration times using parameter C1-10 (default = 1).
Setting Description
0 Time is set in units of 0.01 s, making the setting range 0.00 to 600.00 seconds.
1 Time is set in units of 0.1 s, making the setting range 0.0 to 6000.0 seconds.
n
Switching Accel/Decel Times with Digital Input Terminals
Up to four different acceleration / deceleration times can be selected using any two digital input terminals S1 through S7.
Program two parameters H1-01 through H1-07 to “07” (Accel/Decel Time 1) and “1A” (Accel/Decel Time 2). The combination of these two inputs
activates the acceleration/deceleration times as shown below. As the contacts of the terminals open and close, the following acceleration and deceleration
time combinations are possible:
Accel/Decel Time 1
H1-oo = 7
Accel/Decel Time 2
H1-oo = 1A
Acceleration Time Deceleration Time
Open (not selected) Open (not selected) C1-01 C1-02
Closed Open (not selected) C1-03 C1-04
Open (not selected) Closed C1-05 C1-06
Closed Closed C1-07 C1-08
n
Automatically Switching Acceleration/Deceleration Times
The drive can automatically switch between acceleration and deceleration times.
When the output frequency reaches the value set to C1-11, the drive will switch acceleration and deceleration times as shown in the figure below. Setting
C1-11 to 0.0 Hz disables this function.
Output Frequency
C1-11
Accel/Decel Time
Switch Frequency
C1-07
setting
When the output frequency ≥ C1-11, drive uses Accel/Decel Time 1 (C1-01, -02)
When the output frequency < C1-11, drive uses Accel/Decel Time 2 (C1-07, -08)
C1-01
setting
C1-02
setting
C1-08
setting
Figure 4.21 Accel/Decel Time Switching Frequency
n
Using S-Curve Characteristics during Acceleration/Deceleration
Using S-curve characteristics to smooth acceleration and deceleration minimizes abrupt shock to the load. Set S-curve characteristic time during
acceleration/deceleration at start and acceleration/deceleration at stop.
Note: 1. Setting S-curve characteristics will lengthen accel/decel times as follows: Accel Time = Selected Accel Time + (C2-01 + C2-02)/2 Decel Time = Selected Decel Time +
(C2-03 + C2-04)/2
2. Set longer S-curve times using PM Open Loop Vector Control.
Setting Example
Figure 4.22 illustrates S-curve characteristics switching between forward and reverse.
C2-02
C2-01
C2-03
C2-04
C2-02
C2-01
C2-03
C2-04
Forward Run
Command
Reverse Run
Command
Output
Frequency
Figure 4.22 S-Curve Characteristics
4.6 Basic Drive Setup Adjustments
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
81
4
Start-Up Programming
& Operation
To Next Page
Loading...
