L8: Drive Protection - YASKAWA HV600 Manual

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L7-16: Torque Limit Process at Start
No.
Name
(Hex.)
L7-16 Torque Limit Process at Start
(044D)
0 : Disabled
There is torque limit at start without a delay time.
Use this setting to maximize the response time when sudden acceleration or deceleration at start is necessary.
1 : Enabled
There is a delay time of 64 ms at start to build the torque limit.
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L8: Drive Protection

L8 parameters set protective functions that prevent faults such as overheating, phase loss, and ground faults.
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L8-02: Overheat Alarm Level
No.
Name
(Hex.)
L8-02 Overheat Alarm Level
(04AE)
If the heatsink temperature is more than the temperature set in this parameter, the drive detects an overheat pre-alarm.
To enable this function, set one of H2-01 to H2-03 [MFDO Function Select] to 20 [Drive Overheat Pre-Alarm (oH)].
If the temperature increases to the overheat fault level, the drive will trigger an oH1 [Heatsink Overheat] fault and
stop operation.
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L8-03: Overheat Pre-Alarm Selection
No.
Name
(Hex.)
L8-03 Overheat Pre-Alarm
Selection
(04AF)
0 : Ramp to Stop
The drive ramps the motor to stop in the deceleration time. Fault relay output terminal MA-MC activates and MB-MC
deactivates.
1 : Coast to Stop
The output turns off and the motor coasts to stop. Fault relay output terminal MA-MC turns activates and MB-MC
deactivates.
2 : Fast Stop (Use C1-09)
The drive stops the motor in the deceleration time set in C1-09 [Fast Stop Time]. Fault relay output terminal MA-MC
activates and MB-MC deactivates.
3 : Alarm Only
The keypad shows oH and the drive continues operation. The output terminal set for Alarm [H2-01 to H2-03 = 10]
activates.
4 : Operate at Reduced Speed (L8-19)
The drive decelerates to the level set in L8-19 [Freq Reduction @ oH Pre-Alarm] and continues operation. oH flashes
on the keypad.
oH flashes on the keypad. When the alarm is output, the drive decelerates each 10 seconds. If the drive decelerates 10
times and the alarm continues to be output, the output terminal set for oH Pre-Alarm Reduction Limit [H2-01 to H2-
03 = 4D] activates. When the alarm is not output during deceleration, the drive accelerates until it is at the frequency
reference that was applicable before the alarm was turned off.
drive operation at a decreased output frequency.
YASKAWA TOEPYAIHV6002A HV600 Drive Programming
V/f OLV/PM EZOLV OLV/PM
Assigns a time filter to allow the torque limit to build at start.
V/f OLV/PM EZOLV OLV/PM
Sets the oH detection level temperature.
V/f OLV/PM EZOLV OLV/PM
Sets drive operation if it detects an oH alarm.
Description
Description
Description
Figure 2.107 shows the output of the alarm and the
2.9 L: Protection Functions
Default
(Range)
1
(0, 1)
Default
(Range)
Determined by o2-04
(50 - 150 °C)
Default
(Range)
4
(0 - 4)
2
383