• Setting example for operation time rate: In the case where the average operation time per day is about 21 hours and the
average operation days per month is 16 days.
Annual operation time = 21 (h/day) × 16 (days/month) × 12 (months) = 4032 (h/year)
Therefore, set 46.03% in Pr.899.
• Calculate the annual energy saving from the value of [3 Average power saving] cumulated according to the setting of
Pr.899 Operation time rate (estimated value).
Annual power saving amount (kWh/year) =
• When the power cost per hour is set in Pr.896 Power unit cost, the annual energy cost savings can be monitored.
The annual energy cost savings is determined by calculation using the following formula.
Annual power cost saving = annual power saving amount (kWh/year) × Pr.896
• During regenerative driving, substitute the output power during the commercial power supply operation for the saved power
(therefore, input power = 0).
Parameters referred to
Pr.52 Operation panel main monitor
Pr.54 FM/CA terminal function
Pr.158 AM terminal function
5.11.6 Output terminal function selection
Use the following parameters to change the functions of the open collector output terminals and relay output terminals.
5.11 (M) Item and output signal for monitoring
Operation time rate (%) =
24 (h/day) × 365 (days/year)
× 100(%) ＝ 46.03%
With Pr.898 = 10 or 9999, average power
saving (kW) during cumulative period
× 24h × 365 days ×