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"A" Group: Standard Functions Section 3-5
3-5-11 Energy Savings Mode / Optional Accel/Decel
Energy Saving Mode - This function allows the inverter to deliver the mini-
mum 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.
The acceleration time is controlled so that the output current is 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 main-
tained below the OV Trip level (400 V or 800 V).
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 rat-
ing, 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 (500 ms). Otherwise, there can be the case that this energy sav-
ing function doesn't work well.
"A" Function Run
Mode
Edit
Defaults
Func.
Code
Name Description EU Units
A085 Energy-saving operation mode Two option codes:
00... Normal operation
01... Energy-saving operation
8 00 –
A086 Energy-saving mode tuning Range is 0.0 to 100 %. 8 50.0 %
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