Yaskawa AC Drive Z1000 - Manual (Page 310)

u L2: Momentary Power Loss Ride-Thru
No.
(Addr.
Hex)
Name LCD Display Description Values Page
L2-01
(485)
Momentary Power Loss
Operation Selection
PwrL Selection
0: Disabled
1: Enbl with Timer
2: Enbl whl CPU act
0: Disabled.
Drive trips on Uv1 fault when power is lost.
1: Recover within the time set in L2-02.
Uv1 will be detected if power loss is longer than L2-02.
2: Recover as long as CPU has power.
Uv1 is not detected.
Default: 0
Range: 0 to 2
137
L2-02
(486)
Momentary Power Loss
Ride-Thru Time
PwrL Ridethru t
Sets the Power Loss Ride-Thru time. Enabled only when
L2-01 = 1 or 3.
Default: <1>
Min.: 0.0 s
Max.: 25.5 s
138
L2-03
(487)
Momentary Power Loss
Minimum Baseblock
Time
PwrL Baseblock t
Sets the minimum wait time for residual motor voltage decay
before the drive output reenergizes after performing Power
Loss Ride-Thru.
Increasing the time set to L2-03 may help if overcurrent or
overvoltage occur during Speed Search or during DC Injection
Braking.
Default: <1>
Min.: 0.1 s
Max.: 5.0 s
–
L2-04
(488)
Momentary Power Loss
Voltage Recovery Ramp
Time
PwrL V/F Ramp t
Sets the time for the output voltage to return to the preset V/f
pattern during Speed Search.
Default: <1>
Min.: 0.0 s
Max.: 5.0 s
–
L2-05
(489)
Undervoltage Detection
Level (Uv1)
PUV Det Level
Sets the DC bus undervoltage trip level. Default: 190 Vdc
<2> <3>
Min.: 150 Vdc
Max.: 220 Vdc
<3>
–
L2-06
(48A)
KEB Deceleration
Time
KEB Decel Time
Sets the time required to decelerate from the speed when KEB
was activated to zero speed.
Default: 0.00 s
Min.: 0.00
Max.: 6000.0
–
L2-07
(48B)
KEB Acceleration
Time
KEB Accel Time
Sets the time to accelerate to the frequency reference when
momentary power loss is over. If set to 0.0, the active
acceleration time is used.
Default: 0.00 s
Min.: 0.00
Max.: 6000.0
–
L2-08
(48C)
Frequency Gain at KEB
Start
KEB Freq Red
Sets the percentage of output frequency reduction at the
beginning of deceleration when the KEB Ride-Thru function is
started.
Reduction = (slip frequency before KEB) × L2-08 × 2
Default: 100%
Min.: 0
Max.: 300
–
L2-10
(48E)
KEB Detection Time
(Minimum KEB Time) KEB Detect Time
Sets the time to perform KEB Ride-Thru. Default: 50 ms
Min.: 0
Max.: 2000
–
L2-11
(461)
DC Bus Voltage
Setpoint during KEB
KEB DC Bus Level
Sets the desired value of the DC bus voltage during KEB Ride-
Thru.
Default: <2>
[E1-01] × 1.22
Min.: 150 Vdc
Max.: 400 Vdc
<3>
–
L2-29
(475)
KEB Method Selection
KEB Mode Sel
0: Single Mode KEB1
1: Single Mode KEB2
0: Single Drive KEB Ride-Thru 1
1: Single Drive KEB Ride-Thru 2
Default: 0
Range: 0, 1
–
<1> Default setting is dependent on parameter o2-04, Drive Model Selection.
<2> Default setting is dependent on parameter E1-01, Input voltage Setting.
<3> Values shown are specific to 200 V class drives. Double the value for 400 V class drives.
B.8 L: Protection Function
310 YASKAWA ELECTRIC TOEP C710616 45E YASKAWA AC Drive – Z1000 User Manual