Mitsubishi Electric FR-A800, Instruction Manual

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(M) Monitor display and monitor output signal Parameters
5 - 358
Average power saving monitor
([
Average power saving], [ Average power saving rate], [ Average power cost savings])
●
The average power saving monitors are displayed by setting a value other than 9999 in Pr. 897
"Power saving monitor average time".
●
On the [ Average power saving monitor], average power saving amount for each average time
period s displayed.
●
When Pr. 897 is set, the average value is updated each time the average time period elapses, with
the power-ON or inverter reset as the starting point.
The power savings average value update timing signal (Y92) is inverted every time the average
value is updated.
●
When Pr. 895 "Power saving rate reference value" the [ Average power saving rate] for the
averaging time period is displayed on the [4 Average power saving rate] monitor.
●
When the power cost per 1 kWh power amount is set in Pr. 896 "Power unit cost", the cost of the
saved power ([
Average power saving] × Pr. 896) is displayed on the [ Average power cost
savings].
Cumulative energy saving monitors ([ Power saving amount], [ Power cost saving],
[ Annual power saving amount], [ Annual power saving savings]).
●
On the cumulative energy saving cumulative monitors, the monitor data digit can be shifted to
the right by the number of Pr. 891 "Cumulative power monitor digit shifted times". setting. For
example, if the cumulative power value is 1278.56 kWh when Pr. 891 = "2", the PU/DU display is
12.78 (display in 100 kWh increments) and the communication data is 12. If the maximum value
is exceeded when Pr. 891 = "0 to 4", the value is clamped at the maximum value, indicating that a
digit shift is necessary. If the maximum value is exceeded when Pr. 891 = "9999", the value returns
to 0, and the counting starts again. In other monitors, the value is clamped at the displayed
maximum value.
●
The [ Cumulative power saving amount] monitor (6)] can measure the power during a prede-
termined period. Measure with the following procedure.
Write "9999" or "10" in Pr. 898 "Power saving cumulative monitor clear".
Write "0" in Pr. 898 at the measurement start time to clear the power saving cumulative monitor
value and start power saving accumulation.
Write "1" in Pr. 898 at the measurement end time to hold the power saving cumulative monitor
value.
I002618E
Fig. 5-161: Update of the average value
0 4 8 12
16
20
Y92
4 0 8 12 16 0 4
During stop
Average
Average
Average
Average
Pr. 897
When Pr. 897 = 4 [Hr]
Power saving
instantaneous
value [kW]
Average
power
saving [kW]
Operation start
0 in the first
measurement
Power is off
Time
Last value
Stores Hi/Low when the
power is off and starts.
Time