Omron Q2V Series Technical Manual page 671

The drive automatically adjusts the drive rated current to the best value as specified by the set temperature. Set the
ambient temperature of the area where you install the drive to a value that is more than the drive rating.
Refer to Derating Depending on Ambient Temperature on page 303
ambient temperature.
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L8-15: oL2@LoSpeed Selection
No.
Name
(Hex.)
L8-15 oL2@LoSpeed Selection
(04BB)
Note:
Contact the manufacturer or your nearest sales representative before disabling this function at low speeds. If you frequently operate
drives with high output current in low speed ranges, it can cause heat stress and decrease the life span of drive IGBTs.
0 : Disabled
The drive does not decrease the overload protection level.
1 : Enabled
When the drive detects oL2 during low speed operation, it automatically decreases the overload detection level.
At zero speed, the drive derates the overload by 50%.
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L8-18: Soft CurrLim Selection
No.
Name
(Hex.)
L8-18 Soft CurrLim Selection
(04BE)
0 : Disabled
When the output current is at the software current limit value, the drive does not restrict the output voltage.
Note:
The drive may detect an oC [Overcurrent] when loads are particularly heavy or the acceleration time is particularly short.
1 : Enabled
When the output current is at the software current limit value, the drive decreases output voltage to decrease
output current.
When the output current decreases to the software current limit level, the drive starts usual operation.
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L8-19: Frq Reduct@oHPre-Alarm
No.
Name
(Hex.)
L8-19 Frq Reduct@oHPre-Alarm
(04BF)
When these two conditions are correct, this function is enabled:
• L8-03 = 4 [Overheat Pre-Alarm Selection = Run@L8-19 Rate]
• oH alarm is output
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L8-27: OverCurr Det Gain
No.
Name
(Hex.)
L8-27 OverCurr Det Gain
(04DD)
Note:
• If the setting value for L8-27 is the same or almost the same as the setting value for L7-xx [Torque Limit], the drive can detect oC2
[Overcurrent2].
• This function is disabled when you set L8-27 = 0.0. Under usual circumstances, do not set L8-27 = 0.0.
• If the drive rated current is much higher than the motor rated current, PM motor magnets can demagnetize when current flows at the
drive overcurrent detection level. When you set a low overcurrent detection level to prevent PM motor demagnetization, make sure that
you adjust L8-27.
SIEPCYEUOQ2V01A Q2V Technical Manual
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the function to decrease drive overload at low speeds to prevent damage to the main circuit
transistor during low speed operation (at 6 Hz or slower) to prevent oL2 [Drive Overloaded].
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Set the software current limit selection function to prevent damage to the main circuit transistor
caused by too much current.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the ratio at which the drive derates the frequency reference during an oH alarm.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the PM motor overcurrent detection level as a percentage of the motor rated current value.
for information about derating as specified by
Description
Description
Description
Description
12.8 L: PROTECTION
Default
(Range)
1
(0, 1)
Default
(Range)
1
(0, 1)
Default
(Range)
0.8
(0.1 - 0.9)
Default
(Range)
300.0%
(0.0 - 1000.0%)
671
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