Name: YASKAWA E1000
Brand: YASKAWA
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5.8 L: Protection Functions

236 YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual

■ L8-10: Heatsink Cooling Fan Operation Selection

Selects the heatsink cooling fan operation.

Setting 0: Run with timer

The fan is switched on when a Run command is active. It is switched off with the delay set in parameter L8-11 after the

Run command has been released. Using this setting extends the fan lifetime.

Setting 1: Run always

The fan runs whenever power is supplied to the drive.

■

L8-11: Heatsink Cooling Fan Off-Delay Time

Sets the cooling fan switch off-delay time if parameter L8-10 is set to 0.

■

L8-12: Ambient Temperature Setting

If the temperature where the drive is mounted is above the specified values, the drive rated current must be reduced for

optimal performance life. By setting the ambient temperature to parameter L8-12 and adjusting the installation method

setting in L8-35, the drive rating automatically adapts to safe values.

■

L8-15: oL2 Characteristics Selection at Low Speeds

Selects whether the drive overload capability (oL fault detection level) is reduced at low speeds in order to prevent

premature output transistor failures.

Note: Contact Yaskawa for consultation first before disabling this setting.

Setting 0: Protection disabled at low speed

The overload protection level is not reduced. Frequently operating the drive with high output current at low speed can

lead to premature drive faults.

Setting 1: protection enabled at low speed

The overload protection level (oL2 fault detection level) is automatically reduced at speeds below 6 Hz.

■

L8-18: Software Current Limit Selection

The Software Current Limit (CLA) is a drive protection function that prevents main circuit 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.

Setting 0: Software CLA disabled (gain = 0)

The drive may trip on an oC fault if the load is too heavy or the acceleration is too short.

Setting 1: Software CLA 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.