Danfoss VLT FC 102 Programming Manual page 534

Programming Guide | VLT® HVAC Drive FC 102
P
Figure 99: Comparison of Reference Power and Actual Power
The difference between the reference power at fixed speed and the actual power yielded with speed control represents 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 parameter 23-83 Energy Savings. The accumulated value for the difference in power consumption is multiplied with the
energy cost in local currency and the investment is subtracted. This calculation for cost savings can also be read in parameter 23-84 Cost
Savings. 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.
Table 51: Parameter Overview
Parameter for settings
Rated motor power
Power reference factor in %
Energy cost per kWh
Investment
23-80 Power Reference Factor
Default value:
100%
Setup: 2 setups
Data type: Uint8
Set the percentage of the rated motor size (set 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.
23-81 Energy Cost
Default value: 1
534 | © 2024.10
Rated power for the
motor size used
(P 1-20/21)
Reference power
(a ed speed)
(P 23-80)
Actual power yielded
with variable
speed control
(read P 16-10/11)
Parameter 1-20 Motor Power
[kW]/1-21 Motor Power [hp]
Parameter 23-80 Power
Reference Factor
Parameter 23-81 Energy Cost
Parameter 23-82 Investment
Parameters for readout
Energy savings
Actual power
Cost savings
–
Parameter type:
Conversion index:
Change during operation:
Parameter type:
Parameter Descriptions
Parameter 23-83 Energy
Savings
Parameter 16-10 Power
[kW]/Parameter 16-11 Power
[hp]
Parameter 23-84 Cost Savings
–
Range, 0 - 100%
0
True
Range, 0 - 999999.99
AU430028034214en-001901 / 130R0310