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Sets the voltage upper limit during automatic energy saving. 100% corresponds to 230V or 460V depending on

the inverter class used. Refer to the gure 4.4.89.

Figure4.4.89Voltagelimitvalueofcommissioningoperation

11-21

Voltage Limit

Output

Voltage

11-22: Adjustment time of automatic energy saving

Sets sample time constant for measuring output power.

Reduce the value of 11-22 to increase response when the load changes.

Notes:: If the value of 11-22 is too low and the load is reduced the motor may become unstable.

11-23: Detection level of automatic energy saving

Sets the automatic energy saving output power detection level.

11-24: Coefcient of automatic energy saving

The coefcient is used to tune the automatic energy saving. Adjust the coefcient while running the inverter on

light load while monitoring the output power. A lower setting means lower output voltage.

Notes: - If the coefficient is set to low the motor may stall.

- Coefficient default value is based on the inverter rating. Set parameter 13-00. If the motor power does not match

the inverter rating.

Code Parameter Name / Range

11-29 Auto De-rating Selection

0: Disable

1: Enable

The automatic de-rating function automatically reduces the output frequency by 30% of the nominal motor

speed when the inverter detects an overheat condition (heatsink).

Automatic de-rating function depends on the automatic carried frequency reduction selection (11-03).

If automatic carrier frequency reduction is disabled (11-03=0), the output frequency is reduced by 30% of the

nominal motor speed when an overheat condition is detected.

If automatic carrier frequency reduction is enabled (11-03=1), the output frequency is reduced by 30% of the

nominal motor speed when the carrier frequency is at its minimum setting.

11-29=0: Auto de-rating selection disabled, carrier frequency is based on 11-01 or 11-03.

11-29=1: Auto de-rating selection is enabled.

Code Parameter Name / Range

11-30 Variable Carrier Frequency Max. Limit

2~16 kHz

11-31 Variable Carrier Frequency Min. Limit

1~16 kHz

11-32 Variable Carrier Frequency Proportional Gain

00~99

Carrier frequency method depends on the selected control mode.

228 VDI100 • Instruction manual

gefran VDI100 Series User Manual

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