354
YASKAWA
TOEPYAIHV6002A HV600 Drive Programming
■
L1-22: Leakage Current Filter Time1
No.
(Hex.)
Name
Description
Default
(Range)
L1-22
(0768)
RUN
Leakage Current Filter
Time1
Sets the leakage current detection reduction filter time constant during constant speed run.
Determined by C6-02
(0.0 - 60.0 s)
Note:
You can set this parameter when
C6-02 = B [Carrier Frequency Selection = Leakage Current Detection Reduction Rate PWM]
.
If incorrect detection of alarms, for example
oL1 [Motor Overload]
, occur or errors occur in the values on the current
monitor because of a leakage current, increase the setting value.
■
L1-23: Leakage Current Filter Time2
No.
(Hex.)
Name
Description
Default
(Range)
L1-23
(0769)
RUN
Leakage Current Filter
Time2
Sets the leakage current detection reduction filter time constant during acceleration/deceleration.
Determined by C6-02
(0.0 - 60.0 s)
Note:
•
You can set this parameter when
C6-02 = B [Carrier Frequency Selection = Leakage Current Detection Reduction Rate PWM]
.
•
When the setting value increases, the current monitor will start up slowly. Examine the relevant sequence for problems.
If errors occur in the values on the current monitor during acceleration/deceleration, increase the setting value.
◆
L2: Power Loss Ride Through
L2 parameters
set the drive operation during momentary power loss and the KEB Ride-Thru function method of
operation.
■
KEB Ride-Thru Function
KEB is an acronym for Kinetic Energy Backup. If the drive detects a power loss or momentary power loss, it will
quickly decelerate the motor. The drive uses regenerative energy from the motor to keep the main circuit operating.
When you return power during motor deceleration, the drive returns operation to the status before the power loss. The
KEB Ride-Thru function is different than other functions for continuous operation. If the drive detects momentary
power loss, the motor will ramp to stop. It will not coast to stop. This function is applicable for applications in which
it is necessary to prevent materials from running out, for example control for film and fiber lines.
The KEB Ride-Thru function has 2 methods of operation. Parameter
L2-29 [Kinetic Energy Backup Method]
sets the
method.
When you use the KEB Ride-Thru function with one drive, set
L2-29 = 0, 1 [Single Drive KEB Ride-Thru 1, Single
Drive KEB Ride-Thru 2]
.
Table 2.57 KEB Ride-Thru Function Operation Method
L2-29
Kinetic Energy
Backup Method
Operation
Configuration Precautions
0
Single Drive KEB
Ride-Thru 1
The drive uses regenerative energy from the motor to keep the DC bus
voltage at the level set in
L2-11 [KEB DC Bus Voltage Setpoint]
while it
adjusts the rate of deceleration.
The KEB operation continues while the drive adjusts the deceleration rate
with the setting of
C1-09 [Fast Stop Time]
.
•
Set
C1-09
correctly to prevent
Uv1 [DC Bus Undervoltage]
and
ov
[Overvoltage]
.
•
If the drive detects
Uv1
during the KEB operation, decrease the value
set in
C1-09
.
•
If the drive detects
ov
during the KEB operation, increase the value
set in
C1-09
.
1
Single Drive KEB
Ride-Thru 2
The drive uses information about the inertia of the connected machinery
to find the deceleration rate necessary to keep the DC bus voltage at the
level set in parameter
L2-11
.
The drive uses system inertia to calculate the deceleration time. You
cannot adjust this value.
•
If the drive detects
Uv1
during the KEB operation, increase the setting
value of
L3-20 [DC Bus Voltage Adjustment Gain]
and
L3-21
[OVSuppression Accel/Decel P Gain]
.
•
If the drive detects
ov
during the KEB operation, decrease the setting
values of
L3-20
and
L3-21
.
V/f
OLV/PM
OLV/PM
EZOLV
V/f
OLV/PM
OLV/PM
EZOLV
