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Mitsubishi Electric FR-A700 Instruction Manual Page 286

Fr-a700 series to 03460-na/09620-na/00330-n4/00170-n4.
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Energy saving operation and energy saving monitor
(2) Power saving instantaneous monitor ( 1) power savings, 2) power saving rate )
⋅ On the power saving monitor ( 1)), an energy saving effect as compared to the power consumption during
commercial power supply operation (estimated value) is calculated and displays on the main monitor.
⋅ In the following case, the power saving monitor ( 1)) is "0".
(a)Calculated values of the power saving monitor are negative values.
(b)During the DC injection brake operation
(c)Motor is not connected (output current monitor is 0A)
⋅ On the power saving rate monitor ( 2)), setting "0" in Pr. 895 Power saving rate reference value displays the power
saving rate on the assumption that power (estimated value) during commercial power supply operation is 100%.
When Pr. 895 = "1", the power saving rate on the assumption that the Pr. 893 Energy saving monitor reference (motor
capacity) value is 100% is displayed.
(3) Power saving average value monitor ( 3) power saving average value, 4) average power
saving rate average value, 5) power saving amount average value)
⋅ Power saving average value monitor can be displayed when a value other than "9999" is set in Pr. 897 Power saving
monitor average time.
⋅ The power saving average value monitor ( 3)) displays the average value per unit time of the power saving amount
at averaging.
⋅ The average value is updated every time an average time has elapsed after the Pr. 897 setting is changed, power is
turned on or the inverter is reset, assuming as a starting point.The power savings average value update timing
signal (Y92) is inverted every time the average value is updated.
When Pr.897=4 [Hr]
Power saving
instantaneous
value [kW]
0
Operation start
Pr. 897 setting
Power saving
average value
[kW]
Y92: power saving
average value
0
update timing signal
⋅ The power saving average value monitor ( 4)) displays the average value per unit time of power saving rate ( 2)) at
every average time by setting "0" or "1" in Pr. 895 Power saving rate reference value.
⋅ By setting the charge (power unit) per 1kWh of power amount in Pr. 896 Power unit cost, the power saving amount
average value monitor ( 5)) displays the charge relative to the power saving average value (power saving average
value ( 3)) × Pr. 896).
(4) Cumulative saving power monitor ( 6) power saving amount, 7) power saving amount
charge, 8) annual power saving amount, 9) annual power saving amount charge)
⋅ On the cumulative saving power monitor, the monitor data digit can be shifted to the right by the number of Pr. 891
Cumulative power monitor digit shifted times settings. For example, if the cumulative power value is 1278.56kWh
when Pr. 891 = "2", the PU/DU display is 12.78 (display in 100kWh increments) and the communication data is 12.
If the maximum value is exceeded at Pr. 891 = "0 to 4", the power is clamped at the maximum value, indicating that
a digit shift is necessary. If the maximum value is exceeded at Pr. 891 = "9999", the power returns to 0 and is
recounted. The other monitors are clamped at the display maximum value.
⋅ The cumulative saving power monitor ( 6)) can measure the power amount during a predetermined period.
Measure according to the following steps
1) Write "9999" or "10" in Pr. 898 Power saving cumulative monitor clear.
2) Write "0" in Pr. 898 at measurement start timing to clear the cumulative saving power monitor value and start
totalization of power saving.
3) Write "1" in Pr. 898 at measurement end timing to hold the cumulative saving power monitor value.
REMARKS
⋅ The cumulative saving power monitor value is stored every hour. Hence, when the power supply is switched on again within one
hour after it was switched off, the previously stored monitor value is displayed and totalization starts. (The cumulative monitor
value may decrease)
276
4
Average
0 in the first
measurement
4
During stop
8
12
Average
Average
8
12
Power
is off
16
20
Average
Last value
Stores Hi/Low when the
power is off and starts.
16
0
T
4

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Fr-a720-00030Fr-a740-00015

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