Mitsubishi Electric FR-A700 Series, Technical Manual

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362
PARAMETER
(2) Energy saving instantaneous monitor
1) Power saving,
2)Power saving rate
The power saving monitor 1) calculates power saving
effect (difference) to the power consumption
(estimated value) during commercial power supply
operation and displays on the main monitor.
In the following case, the power saving monitor 1) is
0.
(a) The calculated value of the power saving
monitor is negative value.
(b) During DC injection brake operation
(c) The motor is not connected (output current
monitor is 0A)
Power saving rate monitor 2) displays the power
saving rate on the assumption that the power
consumption (estimated value) during commercial
power supply operation is 100% by setting [
Pr. 895
Power saving rate reference value
= 0]. In addition,
when [ Pr. 895 = 1], the monitor displays the power
saving rate on the assumption that the [ Pr. 893 Energy
saving monitor reference (motor capacity) ] is 100%.
(3) Power saving average value monitor
3) Average power saving value,
4) Average power saving rate
5) Average power saving amount charge
The power saving average value monitor is displayed
by setting a value other than 9999 in [
Pr. 897 Power
saving monitor average time ].
The power saving average value monitor 3) displays
the unit time average value of power saving amount
at every averaging.
The average value is updated when the [
Pr. 897 ]
setting is changed, power is turned ON, or the
average time has passed since the inverter is reset.
Power saving average value update timing signal
(Y92) is inversed every time the average value is
updated.
When 0 or 1 is set in [
Pr. 895 Power saving rate
reference value ], power saving average value monitor
4) displays unit time average value of power saving
rate 2) at every averaging time.
When charge (unit power value) per 1kWh of power
amount is set in [
Pr. 896 Unit power value ], power
saving amount average value monitor 5) displays
charge (power saving average value 3) [
Pr. 896
]) to
the power saving average value.
(4) Power saving cumulative monitor
6) Power saving amount,
7) Power saving amount charge,
8) Annual power saving amount,
9) Annual power saving amount charge
The power saving cumulative monitor data digit can
be shifted to the right by the number set in [
Pr.
891Cumulative power monitor digit shifted time
]. For
example, if the cumulative power value is
1278.56kWh when [
Pr. 891 = 2] , the PU/DU display is
12.78 (displayed in 100kWh increments) and the
communication data is 12.
If the maximum value exceeded at [
Pr. 891 = 0 to 4],
the power is clamped at the maximum value,
indicating that a digit shift is necessary. When [
Pr. 891
= 9999], the value returns to 0 if it exceeds the
maximum value, then counting restarts.
The other monitors are clamped at the display upper
limit.
The power saving cumulative monitor value is stored
every hour. Hence, when the power supply is
switched OFF within one hour, and switched ON
again, the previously stored monitor value is
displayed and accumulation starts. (The cumulative
monitor value may decrease)
The power saving amount monitor 6) can measure
the power amount during a predetermined period.
Carry measurement according to the following steps.
i) Write 9999 or 10 in [
Pr. 898 Power saving cumulative
monitor clear ].
ii) Write [ Pr. 898 = 0] at measurement start timing to
clear the power saving cumulative monitor value
and start accumulation of power saving.
iii) Write [ Pr. 898 = 1] at measurement end timing to
hold the power saving cumulative monitor value.
0 4 8 12 16 20 T
Average power saving value when [ Pr.897 = 4] [Hr]
Power saving
instantaneous
value [kW]
[ Pr. 897 ] setting
Power saving
average value
[kW]
Y92: power saving
average value
update timing signal
Operation start
0 in the first
measurement
Average Average
During stop
Average
Average
Power
is OFF
Last value
Stores High/Low when the
power is off and starts.
4 0 8 12 16 0 4