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Energy Savings Mode / Optional Accel/Decel
Energy Saving Mode – This function allows the inverter to deliver the minimum power
necessary to maintain speed at any given frequency. This works best when driving
variable torque characteristic loads such as fans and pumps. Parameter A085=01
enables this function and A086 controls the degrees of its effect. A setting of 0.0 yields
slow response but high accuracy, while a setting of 100 will yield a fast response with
lower accuracy.
“A” Function
Run
Mode
Edit
Defaults
Func.
Code
Name Description Lnitial data Units
A085
Energy-saving operation
mode
Two option codes:
00…Normal operation
01…Energy-saving operation
Range is 0.0 to 100 %.
U
00
−
A086
Energy-saving mode tuning
U
50.0 %
The acceleration time is controlled so that the output current below the level set by the
Overload Restriction Function if enabled (Parameters b021, b022, and b023). If Overload
Restriction is not enabled, then the current limit used is 150% of the inverter’s rated
output current.
The deceleration time is controlled so that the output current is maintained below 150%
of the inverter’s rated current, and the DC bus voltage is maintained below the OV Trip
level (400V or 800V).
NOTE: If the load exceeds the rating of the inverter, the acceleration time may be increased.
NOTE: If using a motor with a capacity that is one size smaller than the inverter rating,
enable the Overload Restriction function (b021) and set the Overload Restriction Level
(
b022) to 1.5 times the motor nameplate current.
NOTE: Be aware that the acceleration and deceleration times will vary, depending on the
actual load conditions during each individual operation of the inverter.
NOTE: When analog input is a source of frequency command, be sure to set analog filter
A016=31 (500ms). Otherwise, there can be the case that this energy saving function doesn’t
work well.
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