4-208
In certain applications the optimum AES voltage needs to be adjusted in order to achieve optimum energy
savings. Use the following AES parameters for manual adjustment:
11-21: Voltage limit value of AES commissioning operation
Set the voltage upper limit during automatic energy saving. 100% corresponds to the settings of parameter
01-03 (Maximum Output Voltage) depending on the inverter class used. Refer to the Fig.4.4.80.
11-21
11-21
Voltage Limit
Output
Voltage
Figure 4.4.80 Voltage limit value of commissioning operation
11-22: Adjustment time of automatic energy saving
Set sample time constant for measuring output power.
Reduce the value of 11-22 to increase response when the load changes.
Note: 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
Set the automatic energy saving output power detection level.
11-24: Coefficient of automatic energy saving
The coefficient is used to tune the automatic energy saving. Adjust the coefficient 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.