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 and undertorque detection, and other types of hardware protection.
u
L1: Motor Protection
No.
(Addr.
Hex)
Name LCD Display Description Values Page
L1-01
(0480)
Motor Overload
Protection Selection
Mtr OL Charact
0: OL1 Disabled
1: VT Motor
2: CT Motor
3: Vector Motor
4: PM Motor
5: Constant Torque
6: 50Hz VT Motor
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
4: PM motor with variable torque
5: PM motor with constant torque control
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
(0481)
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
–
L1-03
(0482)
Motor Overheat Alarm
Operation Selection
(PTC input)
Mtr OH Alarm Sel
0 : Ramp to Stop
1: Coast to Stop
2: Fast-Stop
3: Alarm only
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
(0483)
Motor Overheat Fault
Operation Selection
(PTC input)
Mtr OH Fault Sel
0 : Ramp to Stop
1: Coast to Stop
2: Fast-Stop
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
(0484)
Motor Temperature
Input Filter Time (PTC
input)
Mtr Temp Filter
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
–
L1-08
(1103)
<2>
oL1 Current Level OL1 current lvl1
Sets the reference current for motor thermal overload detection
for motor 1 in amperes.
Note: This parameter is not available in models
4A0930 and 4A1200.
Default: 0.0 A
Min.: 10% of
drive rated
current
Max.: 150% of
drive rated
current
<3>
–
L1-09
(1104)
<2>
oL1 Current Level for
Motor 2
OL1 current lvl2
Sets the reference current for motor thermal overload detection
for motor 2 in amperes.
Note: This parameter is not available in models
4A0930 and 4A1200.
Default: 0.0 A
Min.: 10% of
drive rated
current
Max.: 150% of
drive rated
current
<3>
–
L1-13
(046D)
Continuous
Electrothermal
Operation Selection
Mtr OL Mem Sel
0: Disabled
1: Enabled
0: Disabled
1: Enabled
Default: 1
Range: 0, 1
–
L1-15
(0440)
Motor 1 Thermistor
Selection (NTC)
M1 OH5 Fault Sel
0: Disabled
1: Enabled
Note: This parameter is only available in models
4A0930 and 4A1200.
Default: 0
Range: 0, 1
–
L1-16
(0441)
Motor 1 Overheat
Temperature
M1 OH5 level
Sets the temperature for motor 1 that triggers an overheat fault
(oH5).
Note: This parameter is only available in models
4A0930 and 4A1200.
Default: 120 °C
Min.: 50
Max.: 200
–
B.8 L: Protection Function
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide
299
B
Parameter List
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