5.4 Details of Function Codes
5-107
Details of
Function Codes
F37 to F41
E codes
C codes
P codes
H codes
A codes
b codes
r codes
J codes
d codes
U codes
y codes
Chapter 5 Function Code
Auto energy saving operation (H67)
This feature automatically controls the supply voltage to the motor to minimize the total power loss of motor
and inverter. (Note that this feature may not be effective depending upon the motor or load characteristics.
Check the advantage of energy saving before you actually apply this feature to your machinery.)
You can select whether applying this feature to constant speed operation only or applying to constant speed
operation and accelerating/decelerating operation.
Data for H67 Auto energy saving operation
0
Enable only during running at constant speed (In accelerating/decelerating, the
torque boost by F09 or the auto torque boost applies depending on the F37 setting.)
1
Enable during running at constant speed or accelerating/decelerating (Note: For
accelerating/decelerating, enable only when the load is light.)
If auto energy saving operation is enabled, the response to a motor speed change from constant speed
operation may be slow. Do not use this feature for such machinery that requires quick
acceleration/deceleration.
y Use auto energy saving only where the base frequency is 60 Hz or lower. If the base
frequency is set at 60 Hz or higher, you may get a little or no energy saving advantage. The
auto energy saving operation is designed for use with the frequency lower than the base
frequency. If the frequency becomes higher than the base frequency, the auto energy saving
operation will be invalid.
y This function is controlled in accordance with the motor characteristics. Since this function
relies also on the characteristics of the motor, set the base frequency 1 (F04), the rated
voltage at base frequency 1 (F05), and other pertinent motor parameters (P01 through P03
and P06 through P99) in line with the motor capacity and characteristics, or else perform
auto-tuning (P04).
y Under vector control without speed sensor, the auto energy saving operation is disabled.
F38 and
F39
Stop Frequency (Detection mode and Holding time) (Refer to F23.)
For details about the setting of the stop frequency (detection mode and holding time), refer to the description
of F23.
F40 and
F41
Torque Limiter 1-1, 1-2
Related function codes: E16 and E17 (Torque Limiter 2-1, 2-2)
H73 (Torque Limiter, Operating conditions)
H76 (Torque Limiter, Frequency increment limit for braking)
Under V/f control
If the inverter’s output torque exceeds the specified levels of the torque limiters (F40, F41, E16, E17, and
E61 to E63), the inverter controls the output frequency and limits the output torque for preventing a stall.
To use the torque limiters, it is necessary to configure the function codes listed in the table below.
In braking, the inverter increases the output frequency to limit the output torque. Depending on the
conditions during operation, the output frequency could dangerously increase. H76 (Frequency
increment limit for braking) is provided to limit the increasing frequency component.
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