Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

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(M) Monitor display and monitor output signal Parameters
5 - 374
●
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".)
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.)
Power saving real-time monitor ([ Power saving] and [ Power saving rate])
●
On the [ Power saving monitor], an energy saving effect as compared to the consumed power
during commercial power supply operation (estimated value) is calculated and displays on the
main monitor.
●
In the following cases, the [ Power saving monitor] indicates "0".
– (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 [ Power saving rate monitor], the power saving rate considering the consumed power
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)
Energy saving
monitored item
Description and formula
Incre-
ment
Parameter setting
Pr. 895 Pr. 896 Pr. 897 Pr. 899
Power saving
amount
The cumulative power saving is added up per
hour.

( Power saving ×
Δ
t)
0.01 kWh/
0.1 kWh
⎯
9999
⎯
9999
Power cost saving
The power saving amount in terms of cost.
Power saving amount × Pr. 896
0.01/0.1
⎯
0 to
500
Annual power
saving amount
Estimated value of annual power saving
amount.
0.01 kWh/
0.1 kWh
⎯
9999
0 to
100%
Annual power cost
savings
Annual power saving amount in terms of cost.
Annual power saving amount × Pr. 896
0.01/0.1
⎯
0 to
500
Tab. 5-143: Cumulative saving power monitor list
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 amount
×24×365×
Pr. 899
Operation time during
power saving
accumulation
100