YASKAWA T1000A - Page 257

5.11 S: Functions for Textile Applications
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 257
Parameter Details
5
n S4-07: KEB End Detection Time
Sets the time for that the DC bus voltage must exceed the level set in S4-06 in order to end the KEB function and
reaccelerate to the set frequency reference.
Note: This parameter is disregarded by the drive is an input terminal is set for KEB (H1- = 65 or 66).
n S4-08: KEB 1 Phase Loss Detection Level
Defines the DC bus voltage ripple that indicates a one phase loss on input side, thus triggering the KEB function. A
setting of 0 V will keep the KEB function from being triggered when one phase loss occurs.
n
S4-09: KEB 1 Phase Loss Sampling Time
Sets the sampling time used to detect one input phase loss.
n
S4-10: KEB 1 Phase Loss Detection Time
Sets the time that the ripple in the DC bus voltage must exceed the level set in S4-08 to trigger one phase loss detection.
n
S4-11: KEB Target Voltage
When KEB 1 or KEB 3 has been selected, the drive attempts to keep the DC bus voltage at the target voltage defined in
S4-11 multiplied by E1-01.
Note: 1. This parameter is disabled when KEB 2 is enabled.
2. S4-06 must be set to higher value than S4-11.
n S4-12: KEB Hold Time
Once KEB is complete, S4-12 sets the time to hold the frequency reference before reacceleration.
n
S4-13: KEB Minimum Operation Time
Sets the minimum period of time the KEB must operate for once it has been triggered. Even if the conditions that
triggered KEB may no longer be present, KEB will still continue until the time set to S4-13 has passed.
No. Name Setting Range Default
S4-07 KEB End Detection Time 0 to 2000 ms
0 ms
No. Name Setting Range Default
S4-08
<1> This value is for 200 V drives. Double this setting when using a 400 V class drive.
KEB 1 Phase Loss Detection Level 0 to 800 V <1> 0 V
No. Name Setting Range Default
S4-09 KEB 1 Phase Loss Sampling Time 0 to 3000 ms 0 ms
No. Name Setting Range Default
S4-10 KEB 1 Phase Loss Detection Time 0 to 10 ms 10 ms
No. Name Setting Range Default
S4-11 KEB Target Voltage 0.80 to 1.50 1.35
No. Name Setting Range Default
S4-12 KEB Hold Time 0.0 to 10.0 s 0.0 s
No. Name Setting Range Default
S4-13 KEB Minimum Operation Time 0 to 2000 ms 50 ms