YASKAWA AC Drive-A1000 - L: Protection Function; L1: Motor Protection; L2: Momentary Power Loss Ride-Thru

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 detection, and torque limits.
u
L1: Motor Protection
No.
(Addr.
Hex)
Name Description Values Page
L1-01
(480)
Motor Overload Protection
Selection
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
238
L1-02
(481)
Motor Overload Protection
Time
All Modes
Sets the motor thermal overload protection (oL1) time.
Default: 1.0 min
Min.: 0.1
Max.: 5.0
240
L1-03
(482)
Motor Overheat Alarm
Operation Selection
(PTC input)
All Modes
Sets operation when the motor temperature analog input (H3-02, H3-06, or
H3-10 = 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
242
L1-04
(483)
Motor Overheat Fault
Operation Selection
(PTC input)
All Modes
Sets stopping method when the motor temperature analog input (H3-02,
H3-06, 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
242
L1-05
(484)
Motor Temperature Input
Filter Time (PTC input)
All Modes
Adjusts the filter for the motor temperature analog input (H3-02, H3-06, or
H3-10 = E).
Default: 0.20 s
Min.: 0.00
Max.: 10.00
242
L1-13
(46D)
Continuous Electrothermal
Operation Selection
All Modes
0: Disabled
1: Enabled
Default: 1
Range: 0, 1
243
<1> Default setting is determined by parameter A1-02, Control Mode Setting.
u
L2: Momentary Power Loss Ride-Thru
No.
(Addr.
Hex)
Name Description Values Page
L2-01
(485)
Momentary Power Loss
Operation Selection
All Modes
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: 0
Range: 0 to 5
243
L2-02
(486)
Momentary Power Loss
Ride-Thru Time
All Modes
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
248
B.10 L: Protection Function
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
427
B
Parameter List