YASKAWA A1000 Series Technical Manual page 273

L8-35: Installation Method Selection
■
Selects the type of installation for the drive and changes the drive overload (oL2) limits accordingly.
Note: 1. This parameter is not reset when the drive is initialized.
2. The value is preset to the appropriate value when the drive is shipped. Change the value only when using Side-by-Side installation or
when mounting a standard drive with the heatsink outside the cabinet.
No.
L8-35
Setting 0: IP00 enclosure
For an IP00 enclosure drive installed with at a minimum of 30 mm space to the next drive or a cabinet wall.
Setting 1: Side-by-Side mounting
For drives mounted according to Yaskawa's Side-by-Side specifications (requires 2 mm between drives).
Setting 2: IP20 or NEMA Type 1 enclosure
For drives compliant with IP20 or NEMA Type 1 enclosure specifications.
Setting 3: Finless drive or external heatsink Installation
For finless drives or a standard drive mounted with the heatsink outside the cabinet or enclosure panel.
L8-38: Carrier Frequency Reduction Selection
■
Lets the drive reduce the carrier frequency when the output current exceeds a certain level. This temporarily increases the
overload capability (oL2 detection), allowing the drive to run through transient load peaks without tripping.
L8-38 selects the operation of the carrier frequency reduction function.
Note: This function cannot be used in Advanced Open Loop Vector for PM motors.
No.
L8-38
Setting 0: Disabled
No carrier frequency reduction at high current.
Setting 1: Enabled for output frequencies below 6 Hz
The carrier frequency is reduced at speeds below 6 Hz when the current exceeds 100% of the drive rated current. The
drive returns to its normal carrier frequency when the current falls below 88% or the output frequency exceeds 7 Hz.
Setting 2: Enabled for entire frequency range
The carrier frequency is reduced at the following speeds:
• Below 6 Hz when the current exceeds 100% of the drive rated current.
• Above 7 Hz when the current exceeds 112% of the drive rated current.
The drive uses the delay time set in parameter L8-40 and a hysteresis of 12% when switching the carrier frequency back
to the set value.
■ L8-40: Carrier Frequency Reduction Off-Delay Time
Sets a hold time before returning to the original carrier frequency setting after the carrier frequency has been temporarily
derated as determined by L8-38. The carrier frequency reduction function is disabled if this value is 0.00 s.
No.
L8-40
L8-41: High Current Alarm Selection
■
Triggers a high current alarm (HCA) when the output current rises too much.
No.
L8-41
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Name
Installation Method Selection
Name
Carrier Frequency Reduction Selection
Name
Carrier Frequency Reduction Off-Delay Time
Name
High Current Alarm Selection
5.8 L: Protection Functions
Setting Range Default
0 to 3 Determined by o2-04
Setting Range Default
Determined by A1-02,
0 to 2
C6-01 and o2-04
Setting Range Default
0.00 to 2.00 s Determined by A1-02
Setting Range Default
0 or 1
5
0
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