Mitsubishi Electric FR-A820-00046 Instruction Manual page 537

Parameters
● The items that can be monitored on the cumulative energy saving monitor (Pr. 52, Pr. 774 to Pr. 776,
Pr. 992 = "51") are indicated below.
(The monitor value of the cumulative monitor can be shifted to the right with Pr. 891 "Cumulative
power monitor digit shifted times".)
Energy saving
monitored item
Power saving
amount
Power cost saving
Annual power
saving amount
Annual power cost
savings
Tab. 5-139: Cumulative saving power monitor list
For communication, (RS-485 communication, communication option), the display increments are
1. For example, "10.00 kWh" is displayed as "10" for communication data.
When using the LCD operation panel or the parameter unit, "kW" is displayed
The increment differs according to capacities. (FR-A820-03160(55K) or lower, FR-A840-01800(55K)
or lower / FR-A820-03800(75K) or higher, FR-A840-02160(75K) or higher.)
NOTES The operation panel and the parameter unit have a 5-digit display. This means, for example, that
when a monitor value in 0.01 units exceeds "999.99", the decimal place is moved up as in "1000.0"
and the display changes to 0.1 units. The maximum display number is "99999".
The maximum value for communication (RS-485 communication, communication option) when
Pr. 898 "Power saving cumulative monitor clear" = "9999" is "65535". The maximum value for the
0.01-unit monitor is "655.35", and the maximum value for the 0.1-unit monitor is "6553.5".
Power saving real-time monitor ([
● On the [
during commercial power supply operation (estimated value) is calculated and displays on the
main monitor.
● In the following cases, the [
– (a) Calculated values of the power saving monitor are negative values.
– (b) During DC injection brake operation.
– (c) The motor is not connected (output current monitor is 0A).
● On the [
during the power supply operation (estimated value) as 100% is displayed. Pr. 895 "Power saving
rate reference value" needs to be set to "0". Energy saving monitor reference (motor capacity)
FR-A800
Description and formula
The cumulative power saving is added up per
hour.
 (³ Power saving × Δt)
The power saving amount in terms of cost.
Power saving amount × Pr. 896
Estimated value of annual power saving
amount.
Power saving amount
Operation time during
power saving
accumulation
Annual power saving amount in terms of cost.
Annual power saving amount × Pr. 896
Power saving] and [
Power saving monitor], an energy saving effect as compared to the consumed power
Power saving monitor] indicates "0".
Power saving rate monitor], the power saving rate considering the consumed power
(M) Monitor display and monitor output signal
Incre-
ment
0.01 kWh/
0.1 kWh
0.01/0.1
0.01 kWh/
Pr. 899
0.1 kWh
×24×365×
100
0.01/0.1
Power saving rate])
Parameter setting
Pr. 895 Pr. 896 Pr. 897 Pr. 899
⎯
9999
9999
0 to
⎯
500
⎯
⎯
9999
0 to
100%
0 to
⎯
500
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