B.10 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
All Modes
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
309
L1-02
(0481)
Motor Overload
Protection Time
MOL Time Const
All Modes
Sets the motor thermal overload protection (oL1) time.
Default: 1.0 min
Min.: 0.1
Max.: 5.0
311
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
All Modes
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
313
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
All Modes
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
313
L1-05
(0484)
Motor Temperature
Input Filter Time (PTC
input)
Mtr Temp Filter
All Modes
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
313
L1-08
(1103)
oL1 Current Level OL1 current lvl1
All Modes
Sets the reference current for motor thermal overload detection
for motor 1 in amperes.
Default: 0.0 A
Min.: 10% of
drive rated
current
Max.: 150% of
drive rated
current
<2>
313
L1-09
(1104)
oL1 Current Level for
Motor 2
OL1 current lvl2
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLVV/f V/f w PG OLV CLVV/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLVV/f V/f w PG OLV CLV
Sets the reference current for motor thermal overload detection
for motor 2 in amperes.
Default: 0.0 A
Min.: 10% of
drive rated
current
Max.: 150% of
drive rated
current
<2>
314
L1-13
(046D)
Continuous
Electrothermal
Operation Selection
Mtr OL Mem Sel
0: Disabled
1: Enabled
All Modes
0: Disabled
1: Enabled
Default: 1
Range: 0, 1
314
<1> Default setting is determined by parameter A1-02, Control Method Selection.
<2> Display is in the following units:
2o0028, 2o0042, and 4o0011 to 4o0027: 0.01 A units
2o0054 to 2o0248 and 4o0034 to 4o0930: 0.1 A units
B.10 L: Protection Function
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
549
B
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