L: Protection Function; L1: Motor Protection; L2: Momentary Power Loss Ride-Thru - YASKAWA P1000 Technical Manual

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.
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L1: Motor Protection

No.
(Addr. Name
Hex)
L1-01 Motor Overload Protection
(480) Selection
L1-02 Motor Overload Protection
(481) Time
Motor Overheat Alarm
L1-03 Operation Selection
(482) (PTC input)
Motor Overheat Fault
L1-04 Operation Selection
(483) (PTC input)
L1-05 Motor Temperature Input
(484) Filter Time (PTC input)
L1-13 Continuous Electrothermal
(46D) Operation Selection
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L2: Momentary Power Loss Ride-Thru

No.
(Addr. Name
Hex)
L2-01 Momentary Power Loss
(485) Operation Selection
L2-02 Momentary Power Loss
(486) Ride-Thru Time
L2-03 Momentary Power Loss
(487) Minimum Baseblock Time
Momentary Power Loss
L2-04
Voltage Recovery Ramp
(488)
Time
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
Description
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.
Sets the motor thermal overload protection (oL1) time.
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)
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)
Adjusts the filter for the motor temperature analog input (H3-02, H3-10, or
H3-06 = E).
0: Disabled
1: Enabled
2: Enabled (RTC)
Description
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.
Sets the Power Loss Ride-Thru time. Enabled only when L2-01 = 1 or 3.
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.
Sets the time for the output voltage to return to the preset V/f pattern during
Speed Search.
B.9 L: Protection Function
Values Page
Default: 1
234
Range: 0 to 6
Default: 1.0 min
Min.: 0.1 236
Max.: 5.0
Default: 3
237
Range: 0 to 3
Default: 1
237
Range: 0 to 2
Default: 0.20 s
Min.: 0.00 238
Max.: 10.00
Default: 1
238
Range: 0 to 2
Values Page
Default: 2
240
Range: 0 to 5
<1>
Default:
245
Min.: 0.0 s
Max.: 25.5 s
<1>
Default:
245
Min.: 0.1 s
Max.: 5.0 s
<1>
Default:
246
Min.: 0.0 s
Max.: 5.0 s
B
463