Danfoss VLT AQUA Drive FC 202 Programming Manual page 202

Parameter Description
23-65 Minimum Bin Value
Range:
Size [ 0 -
related 100
*
%]
3 3
23-66 Reset Continuous Bin Data
Option:
[0] Do not
*
reset
[1] Do reset
23-67 Reset Timed Bin Data
Option:
[0] Do not
*
reset
[1] Do reset
3.20.5 23-8* Payback Counter
The Payback Counter feature can give a rough calculation
of payback if 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 show the average power yielded
before the upgrade with variable speed control.
Illustration 3.78 Comparison of the Reference Power and
Actual Power
The difference between the reference power at fixed speed
and the actual power yielded with speed control shows
the actual saving.
200
VLT
Function:
Array with 10 elements ([0]–[9] below
parameter number in display). Press [OK] and
step between elements with [
Set the minimum limit for each interval in
parameter 23-61 Continuous Bin Data and
parameter 23-62 Timed Bin Data. Example: If
selecting [1] counter and changing setting from
10% to 12%, [0] counter is based on the
interval 0 to <12% and [1] counter on interval
12 to <20%.
Function:
Select [1] Do reset to reset all values in
parameter 23-61 Continuous Bin Data. After
pressing [OK], the setting of the parameter
value automatically changes to [0] Do not reset.
Function:
Select [1] Do reset to reset all counters in
parameter 23-62 Timed Bin Data.
After pressing [OK], the setting of the
parameter value automatically changes to [0]
Do not reset.
P
Rated power for the
motor size used
(P 1-20/21)
Reference power
(at xed speed)
(P 23-80)
Actual power yielded
with variable
speed control
(read P 16-10/11)
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®
AQUA Drive FC 202
As value for the fixed speed case, the rated motor size
(kW) is multiplied by a factor (set in %) showing the power
yielded at fixed speed. The difference between this
reference power and the actual power is accumulated and
stored. Read the difference in energy in
▲ ▼
] and [ ].
parameter 23-83 Energy Savings.
The accumulated value for the difference in power
consumption is multiplied by the energy cost in local
currency and the investment is subtracted. Read this
calculation for cost savings in parameter 23-84 Cost Savings.
Cost savings=(∑ (reference power – actual power)) x
energy cost – extra cost.
Breakeven (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
parameter 23-80 Power Reference Factor to 0.
Rated motor power
Power reference factor in %
Energy cost per kWh
Investment
Energy savings
Actual power
Cost savings
Table 3.31 Parameter Overview
23-80 Power Reference Factor
Range:
100 %
*
23-81 Energy Cost
Range:
1 [0 - 999999.99 ] Set the actual cost for a kWh in local
*
Parameter for settings
Parameter 1-20 Motor Power
[kW]
Parameter 23-80 Power Reference
Factor
Parameter 23-81 Energy Cost
Parameter 23-82 Investment
Parameters for readout
Parameter 23-83 Energy Savings
Parameter 16-10 Power [kW]/
parameter 16-11 Power [hp]
Parameter 23-84 Cost Savings
Function:
[0 - Set the percentage of the rated motor size (set
100 %] in parameter 1-20 Motor Power [kW] or
parameter 1-21 Motor Power [HP]), which shows
the average power yielded at the time running
with fixed speed (before upgrade with variable
speed control).
Set a value different from 0 to start counting.
Function:
currency. If the energy cost is changed
later on, it impacts the calculation for the
entire period.
MG20OB02