YASKAWA T1000A - S5: KEB Accel;Decel Settings

5.11 S: Functions for Textile Applications
258 YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
n S4-14: KEB Reacceleration Prohibit Frequency
Sets the frequency level to prohibit re-acceleration after the power returned. If the drive output frequency fell below S4-
14 during KEB operation the drive will decelerate the motor to stop, even if the power returns. This parameter will have
no effect when KEB has been triggered by One Phase Loss Detection. The drive will always decelerate to a stop in this
case.
A setting of 0.0 essentially disables this parameter.
n
S4-15: KEB Supply Loss Detection Selection
This parameter can be used to trigger KEB operation when the hardware detection circuit detects that the AC supply
voltage has been lost.
Setting 0: Disabled
Setting 1: Enabled
u S5: KEB Accel/Decel Settings
S5 parameters govern settings for acceleration, deceleration and initial frequency step.
n
KEB Decel Time Switching
The KEB 1 and KEB 2 functions can be used with an automatic switch over between two deceleration times. After the
KEB function starts, the drive decelerates the motor according to KEB Decel Time 1 (S5-01). When the output frequency
reaches the switching level set to S5-03 it changes the deceleration time over to KEB Decel Time 2 (S5-02) within the
time set in S5-04.
Figure 5.96
Figure 5.96 KEB Decel Time Switching
Note: 1. S5-01 is enabled as long as the output frequency is greater than S5-03. When the output frequency is less than or equal to S5-03, the
drive uses the deceleration time set to S5-02.
2. S5-03 is set as a percentage of the output frequency just before the KEB function is triggered. It determines the point at which the
drive switches between deceleration times while the KEB function is executed.
No. Name Setting Range Default
S4-14 KEB Reacceleration Prohibit Frequency 0.0 to 100.0% 0.0%
No. Name Setting Range Default
S4-15
KEB Supply Loss Detection Selection
0, 1 1
No. Name Setting Range Default
S5-01
KEB Decel Time 1
0.0 to 200.0 sec 0.0 sec
S5-02 KEB Decel Time 2 0.0 to 200.0 sec 0.0 sec
S5-03 KEB Decel Time Switching Frequency 0.0 to 100.0% 0.0%
S5-04 KEB Decel Time Switching Time 0.0 to 10.0 sec 0.0 sec
Output Frequency
S5-03 (KEB Decel Time
Switching Frequency)
0 Hz
S5-02 (KEB Decel Time 2)
S5-01 (KEB Decel Time 1)
S5-04 (KEB Decel Time
Switching Time)