YASKAWA HV600 User Manual

5.8 L: Protection Functions
342 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
■ L8-03: Overheat Pre-Alarm Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-03
(04AF)
Overheat Pre-Alarm
Selection
Sets drive operation if it detects an oH alarm. 4
(0 - 4)
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. Figure 5.88 shows the output of the alarm and the drive
operation at a decreased output frequency.
H2-xx = 4D: oH Pre-Alarm Reduction Limit
L8-19: Freq Reduction @ oH Pre-Alarm
oH Alarm: Heatsink Overheat
Figure 5.88 Drive Operation at a Decreased Output Frequency when the Overheat Alarm is Output
*1 If the oH alarm continues after 10 reduction cycles, the terminal set for H2-xx = 4D [oH Pre-Alarm Reduction Limit] will activate.
Note:
• The drive will use the largest value of Y1-06 [Minimum Speed], Y4-12 [Thrust Frequency], or d2-02 [Frequency Reference Lower Limit] as
the lower limit for output frequency.
• Parameter L8-97 [Carrier Freq Reduce during OH] enables and disables the carrier frequency reduction during oH pre-alarm.

YASKAWA HV600 Specifications

General

Category	DC Drives
Series	HV600
Overload Capacity	150% for 60 seconds
Output Voltage	0 - Input Voltage
Enclosure	NEMA 1, NEMA 12
Communication	Ethernet/IP, Modbus, DeviceNet, Profibus
Safety	Safe Torque Off (STO)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Short Circuit
Humidity	5-95% (non-condensing)
Altitude	Up to 1000m (3280ft) without derating
Control Method	Vector Control