Yaskawa AC Drive P1000 Bypass Technical Manual - Manual (Page 250)

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 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
0: Disabled
1: General purpose 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
126
L1-02
(481)
Motor Overload Protection
Time
Sets the motor thermal overload protection (oL1) time. Default: 1.0 min
Min.: 0.1
Max.: 5.0
127
u L2: Momentary Power Loss Ride-Thru
No.
(Addr.
Hex)
Name Description Values Page
L2-01
(485)
Momentary Power Loss
Operation Selection
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.
Note: L2-02 is dependent on drive model selection and is not
accessible.
2: Recover as long as CPU has power.
Uv1 is not detected.
Default: 2
Range: 0 to 2
127
L2-02
(486)
Momentary Power Loss
Ride-Thru Time
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
128
L2-03
(487)
Momentary Power Loss
Minimum Baseblock Time
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
128
L2-05
(489)
Undervoltage Detection
Level (Uv1)
Sets the DC bus undervoltage trip level. Default: 190 Vdc
<2> <3>
Min.: 150 Vdc
Max.: 220 Vdc
<3>
128
<1> Default setting is dependent on parameter o2-04, Drive Model Selection.
<2> Default setting is dependent on parameters o2-04, Drive Model Selection, and E1-01, Input Voltage Setting.
<3> Values shown are specific to 208 V bypass drives. Double the value for 480 V bypass drives.
u L3: Stall Prevention
No.
(Addr.
Hex)
Name Description Values Page
L3-02
(490)
Stall Prevention Level
during Acceleration
Used when L3-01 = 1 or 2. 100% is equal to the drive rated current. Default: 120%
Min.: 0
Max.: 120
<1>
128
L3-03
(491)
Stall Prevention Limit
during Acceleration
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
129
B.9 L: Protection Function
250 YASKAWA SIEP YAIP1B 01A YASKAWA AC Drive – P1000 Bypass Technical Manual