L: protection function, L1: motor protection, L2: momentary power loss ride-thru – Yaskawa AC Drive-P1000 Industrial Fan User Manual
Page 442: B.8 l: protection function
B.8 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)
2: Drive dedicated motor with a speed range of 1:10
3: Vector motor with a speed range of 1:100
6: General purpose motor (50 Hz)
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 to 6
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
L1-03
(482)
Motor Overheat Alarm
Operation Selection
(PTC input)
Sets operation when the motor temperature analog input (H3-02, H3-10, or
H3-06 = E) exceeds the oH3 alarm level.
0: Ramp to stop
1: Coast to stop
2: Fast Stop (decelerate to stop using the deceleration time in C1-09)
3: Alarm only (“oH3” will flash)
Default: 3
Range: 0 to 3
L1-04
(483)
Motor Overheat Fault
Operation Selection
(PTC input)
Sets stopping method when the motor temperature analog input (H3-02,
H3-10, or H3-06 = E) exceeds the oH4 fault level.
0: Ramp to stop
1: Coast to stop
2: Fast Stop (decelerate to stop using the deceleration time in C1-09)
Default: 1
Range: 0 to 2
L1-05
(484)
Motor Temperature Input
Filter Time (PTC input)
Adjusts the filter for the motor temperature analog input (H3-02, H3-10, or
H3-06 = E).
Default: 0.20 s
Min.: 0.00
Max.: 10.00
L1-13
(46D)
Continuous Electrothermal
Operation Selection
0: Disabled
1: Enabled
2: Enabled (RTC)
Default: 1
Range: 0 to 2
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.
2: Recover as long as CPU has power. Uv1 is not detected.
3: KEB deceleration for the time set to L2-02.
4: KEB deceleration as long as CPU has power.
5: KEB deceleration to stop.
Default: 2
Range: 0 to 5
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
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
L2-04
(488)
Momentary Power Loss
Voltage Recovery Ramp
Time
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
B.8 L: Protection Function
442
YASKAWA SIEP YAIP1U 01B AC Drive - P1000 Technical Manual