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VLT Automation VT Drive FC322
Programming Guide
As value for the fixed speed case, the rated motor size (kW) is multiplied with a factor (set in %) representing the power yielded 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,
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 par. 23-84,
Cost Savings = ( (Reference Power – Actual Power)) * Energy Cost – Additional 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,
Parameter overview:
Rated Motor Power
Power Reference Factor in %
Energy Cost per kWh
Investment
23-80 Power Reference Factor
Range:
100 %*
[0 - 100 %]
23-81 Energy Cost
Range:
1.00*
[0.00 - 999999.99 ]
23-82 Investment
Range:
0*
[0 - 999999999 ]
23-83 Energy Savings
Range:
0 kWh*
[0 - 0 kWh]
23-84 Cost Savings
Range:
0*
[0 - 2147483647 ]
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Cost Savings
Parameter for settings
Par. 1-20
Par. 23-80
Par. 23-81
Par. 23-82
Function:
Set the percentage of the rated motor size (set in par. 1-20
Power [HP]
) which is supposed to represent the average power yielded at the time running with
fixed speed (before upgrade with variable speed control).
Must be set to a value different from zero to start counting.
Function:
Set the actual cost for a kWh in local currency. If the energy cost is changed later on it will impact
the calculation for the entire period!
Function:
Set the value of the investment spent on upgrading the plant with speed control, in same currency
as used in par. 23-81
Function:
This parameter allows a readout of the accumulated difference between the reference power and
the actual output power.
If motor size set in Hp (par. 1-21
Energy Savings.
Function:
This parameter allows a readout of the calculation based on the above equation (in local currency).
MG.20.W1.22 - VLT is a registered Danfoss trademark
.
Parameters for readout
Energy Savings
Actual Power
Cost Savings
Energy Cost
.
Motor Power [HP]
), the equivalent kW value will be used for the
2 Parameter Description
Energy
Power Reference Factor
, to 0.
Par. 23-83
Par. 16-10/11
Par. 23-84
Motor Power [kW]
or par. 1-21
Motor
2
239
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