YASKAWA iQpump Micro CIMR-PW Series User Manual page 211

L8-18: Software Current Limit Selection
n
The Software Current Limit (CLA) is a drive protection function that prevents output transistor failures caused by high current.
Parameter L8-18 enables or disables this function.
Note: This setting should not be changed unless absolutely necessary. For proper drive protection and operation leave the Software CLA function
enabled.
No.
L8-18
Setting 0: Disabled
The drive may trip on an oC fault if the load is too heavy or the acceleration is too short.
Setting 1: Enabled
When the soft CLA current level is reached, the drive reduces the output voltage in order to reduce the current. If the current
level drops below the Software CLA level, then normal operation will continue.
L8-35: Installation Method Selection
n
Selects the type of installation 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: IP20/IP00 Drive
Must be selected if an IP20/IP00 drive is installed with a minimum of 30 mm space to the next drive or a cabinet wall.
Setting 1: Side-by-Side Mounting
Must be selected if drives are Side-by-Side mounted with a minimum space of 2 mm.
Setting 2: NEMA 1, UL Type 1 Drive
Must be selected if the drive has a NEMA 1, UL Type 1 enclosure or an IP20/Open-Chassis drive fitted with the NEMA 1,
UL Type 1 Kit option.
Setting 3: Finless Drive or External Heatsink Installation
Must be selected for finless drives or if a standard drive is mounted with the heatsink outside the cabinet.
L8-38: Carrier Frequency Reduction Selection
n
The drive can reduce the carrier frequency when the output current exceeds a certain level. This temporarily increases the
overload capability (oL2 detection) and the drive can run through transient load peaks without tripping.
L8-38 selects the operation of the carrier frequency reduction function.
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.
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
Name
Software Current Limit Selection
Name
Installation Method Selection
Name
Carrier Frequency Reduction Selection
5.8 L: Protection Functions
Setting Range
0 or 1
Setting Range
Determined by
0 to 3
Setting Range
0 to 2
Default
0
Default
o2-04
Default
1
5
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