Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 330)

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.
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
0: Disabled
1: General purpose motor (standard fan cooled)
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
182
L1-02
(0481)
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
183
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, H3-06, 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
–
u L2: Momentary Power Loss Ride-Thru
No.
(Addr.
Hex)
Name LCD Display Description Values Page
L2-01
(0485)
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.
Fdv is not detected.
Default: 2
Range: 0 to 2
183
L2-02
(0486)
Momentary Power Loss
Ride-Thru Time
PwrL Ridethru t
Sets the Power Loss Ride-Thru time. Enabled only when
L2-01 = 1.
Default: 0.5 s
Min.: 0.0
Max.: 2.5
184
L2-03
(0487)
Momentary Power Loss
Minimum Baseblock
Time
PwrL Baseblock t
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.
Default: <1>
Min.: 0.1 s
Max.: 5.0 s
184
L2-21
(04F7)
Low Input Voltage
Detection Level
AVV Detect evel Set the level at which to detect a low input voltage.
Default: 150 V
Min.: 100 V
<2>
Max.: 230 V <2>
–
L2-27
(04F7)
Power Supply
Frequency Fault
Detection Width
FDV Detect Width
Sets the frequency width to use to detect power supply
frequency fault (Fdv).
Default: 6.0 Hz
Min.: 3.0 Hz
Max.: 20.0 Hz
–
<1> Default setting is dependent on parameter o2-04, Drive Model Selection.
<2> Values shown are specific to 208 Vac. Double the value for 480 Vac.
B.9 L: Protection Function
330 YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual