Operating instructions
23-66 Reset Continuous Bin Data
Option: Function:
Select Do reset [1] to reset all values in
par. 23-61 Continuous Bin Data.
After pressing OK the setting of the parameter
value will automatically change to Do not reset
[0].
[0]
*
Do not reset
[1] Do reset
23-67 Reset Timed Bin Data
Option: Function:
Select Do reset [1] to reset all counters in
par. 23-62 Timed Bin Data.
After pressing OK the setting of the parameter
value will automatically change to Do not reset
[0].
[0]
*
Do not reset
[1] Do reset
3.21.5 23-8* Payback Counter
The frequency converter includes a feature which can give a
rough calculation on payback in cases where the frequency
converter has been installed in an existing plant to ensure
energy saving by changing from fixed to variable speed
control. Reference for the savings is a set value to represent
the average power yielded before the upgrade with variable
speed control.
The difference between the Reference Power at fixed speed
and the Actual Power yielded with speed control represent
the actual saving.
As value for the fixed speed case, the rated motor size (kW) is
multiplied with a factor (set in %) representing the power
produced at fixed speed. The difference between this
reference power and the actual power is accumulated and
stored. The difference in energy can be read in
par. 23-83 Energy Savings.
The accumulated value for the difference in power consump-
tion is multiplied with the energy cost in local currency and
the investment is subtracted. This calculation for Cost Savings
can also be read in par. 23-84 Cost Savings.
Cost
Savings
=
{
∑
t
=0
t
(
Rated
Motor
Power
∗
Power
Reference
Factor
)
−
Actual
Power
Consumption
×
Energy
Cost
}
−
Investment
Cost
Break even (payback) occurs when the value read in the
parameter turns from negative to positive.
It is not possible to reset the Energy Savings counter, but the
counter can be stopped any time by setting par. 23-80 Power
Reference Factor to 0.
Parameter overview:
Parameter for settings Parameters for readout
Rated Motor Power Par. 1-20 Motor Power [kW] Energy Savings Par. 23-83 Energy Savings
Power Reference Factor in % Par. 23-80 Power Reference Factor Actual Power Par. 16-10 Power [kW],
par. 16-11 Power [hp]
Energy Cost per kWh Par. 23-81 Energy Cost Cost Savings Par. 23-84 Cost Savings
Investment Par. 23-82 Investment
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CA.02 - VLT
®
is a registered Danfoss trademark 159
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