A.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
(480)
Motor Overload
Protection Selection
Mtr OL Charact
0: OL1 Disabled
1: VT Motor
4: PM Motor
0: Disabled
1: General purpose motor (standard fan cooled)
4: PM motor with variable torque
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, 4
99
L1-02
(481)
Motor Overload
Protection Time
MOL Time Const
Sets the motor thermal overload protection (oL1) time. Default: 1.0 min
Min.: 1.0
Max.: 5.0
100
L1-03
(482)
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 or H3-10 = E) exceeds the 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
101
L1-04
(483)
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, or H3-10 = 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
101
L1-05
(484)
Motor Temperature
Input Filter Time (PTC
input)
Mtr Temp Filter
Adjusts the filter for the motor temperature analog input
(H3-02, or H3-10 = E).
Default: 0.20 s
Min.: 0.00
Max.: 10.00
102
L1-08
(1103)
oL1 Current Level oL1 Current Lvl
Sets the reference current for motor thermal overload detection
for the motor in amperes.
Default:
<2>
Min.: 10% of
drive rated
current
Max.: 150% of
drive rated
current
<3>
102
L1-13
(46D)
Continuous
Electrothermal
Operation Selection
Mtr OL Mem Sel
0: Disabled
1: Enabled
2: Enabled(RTC)
0: Disabled
1: Enabled
2: Enable using Real Time Clock
Default: 1
Range: 0 to 2
102
<1> Default setting is determined by parameter A1-02, Control Method Selection.
<2> Default setting is determined by parameters o2-04, Drive Model Selection, and C6-01, Drive Duty Selection.
<3> Display is in the following units: 5A0007 to 5A0017: 0.01 A units; 5A0022 to 5A0242: 0.1 A units.
u
L2: Momentary Power Loss Ride-Thru
No.
(Addr.
Hex)
Name LCD Display Description Values Page
L2-01
(485)
Momentary Power Loss
Operation Selection
PwrL Selection
0: Disabled
1: Enbl with Timer
2: Enbl whl CPU act
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.
Default: 2
Range: 0 to 2
102
L2-02
(486)
Momentary Power Loss
Ride-Thru Time
PwrL Ridethru t
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
103
A.10 L: Protection Function
YASKAWA SIEP YAIZ1U 03B YASKAWA AC Drive – Z1000 Programming Manual
213
A
Parameter List
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