YASKAWA Z1000 - L: Protection Function; L1: Motor Protection; L2: Momentary Power Loss Ride-Thru; L3: Stall Prevention

B.9 L: Protection Function
L parameters provide protection to the drive and motor, including control during momentary power loss, stall prevention,
frequency detection, fault restarts, overtorque and undertorque detection, and other types of hardware protection.
u
L1: Motor Protection
No.
(Addr.
Hex)
Name Description Values Page
L1-01
(480)
Motor Overload Protection
Selection
Mtr OL Charact
0: Disabled
0: OL1 Disabled
1: General purpose motor
1: VT Motor
(standard fan cooled)
The drive may not be able to provide protection when using multiple motors,
even if overload is enabled in L1-01. Set L1-01 to 0 and install separate thermal
relays to each motor.
Default: 1
Range: 0, 1
168
L1-02
(481)
Motor Overload Protection
Time
MOL Time Const
Sets the motor thermal overload protection (oL1) time.
Default: 1.0 min
Min.: 0.1
Max.: 5.0
169
u
L2: Momentary Power Loss Ride-Thru
No.
(Addr.
Hex)
Name Description Values Page
L2-01
(485)
Momentary Power Loss
Operation Selection
PwrL Selection
0: Disabled.
0: Disabled
Drive trips on Uv1 fault when power is lost.
1: Recover within the time set in L2-02.
1: Enbl with Timer
Uv1 will be detected if power loss is longer than L2-02.
Note: L2-02 is dependent on drive model selection and is not
accessible.
2: Recover as long as CPU has power.
2: Enbl whl CPU act
Uv1 is not detected.
Default: 2
<1>
Range: 0 to 2
169
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:
<2>
Min.: 0.0 s
Max.: 25.5 s
170
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:
<2>
Min.: 0.1 s
Max.: 5.0 s
170
L2-05
(489)
Undervoltage Detection
Level (Uv1)
PUV Det Level
Sets the DC bus undervoltage trip level.
Default: 190 Vdc
<3> <4>
Min.: 150 Vdc
Max.: 220 Vdc
<4>
170
<1> Default is 0 in bypass controller software versions VST800297 and earlier.
<2> Default setting is dependent on parameter o2-04, Drive Model Selection.
<3> Default setting is dependent on parameters o2-04, Drive Model Selection, and E1-01, Input Voltage Setting.
<4> Values shown are specific to 208 Vac. Double the value for 480 Vac.
u
L3: Stall Prevention
No.
(Addr.
Hex)
Name Description Values Page
L3-02
(490)
Stall Prevention Level
during Acceleration
StallP Accel Lvl
Used when L3-01 = 1 or 2. 100% is equal to the drive rated current.
Default:
<1>
Min.: 0%
Max.: 150%
<1>
170
L3-03
(491)
Stall Prevention Limit
during Acceleration
StallPAcc LowLim
Sets Stall Prevention lower limit during acceleration when operating in the
constant power range. Set as a percentage of drive rated current.
Default: 50%
Min.: 0
Max.: 100
171
B.9 L: Protection Function
328
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual