Mitsubishi Electric 800 Series Instruction Manual page 256

• When the setting of Pr.897 is changed, when the inverter is powered ON, or when the inverter is reset, the averaging is
restarted. The Energy saving average value updated timing (Y92) signal is inverted every time the averaging is restarted.
When Pr.897=4 [Hr]
Pr.897
Power saving
instantaneous
value [kW]
0
Operation start
Average power
0 in the first
saving [kW]
measurement
Y92
0
• On [4 Average power saving rate] monitoring, the average hourly monitored value of [2 Power saving rate]) is displayed
when Pr.895 Power saving rate reference value is set to "0 or 1".
• On [5 Average power cost savings] monitoring, a monetary value of the average hourly energy saving ([3 Average
power saving] × Pr.896 setting) is displayed when the unit price, power cost per kilowatt (hour), is set in Pr.896 Power
unit cost.
 Cumulative energy saving monitoring ([6 Power saving amount], [7
Power cost saving], [8 Annual power saving amount], [9 Annual power
cost savings])
• The digit of the cumulative energy monitored value can be moved to the right by the number set in Pr.891 Cumulative
power monitor digit shifted times. For example, when Pr.891 = "2", the cumulative power value 1278.56 kWh is
displayed as 12.78 (in 100 kWh increments) on the operation panel, or displayed as 13 on a display used for monitoring
via communication. When Pr.891 = "0 to 4" and the cumulative energy reaches more than the upper limit of readout, the
readout peaks out at the upper limit, which indicates that moving digit is necessary. When Pr.891 = "9999" and the
cumulative energy reaches more than the upper limit of readout, cumulative value is reset to 0 and the metering restarts.
The readout of other items in the cumulative energy saving monitoring peaks out at the upper limit of readout.
• With the monitored value of [6 Power saving amount], a cumulative energy saving during a desired time period can be
measured. Follow this procedure.
1.
Set "10" or "9999" in Pr.898 Power saving cumulative monitor clear.
2.
Change the setting of Pr.898 to "0" when you want to start measuring the energy saving. The cumulative value is
cleared and the cumulative energy saving meter restarts.
3.
Change the setting of Pr.898 to "1" when you want to stop measuring the energy saving. The meter stops and the
cumulative value is fixed.
Power saving
instantaneous
value [kW]
0
Accumulation
Power saving
amount [kWh]
0
Accumulation start
(Pr.898=0)
NOTE
• The cumulative value of energy saving is refreshed every hour. This means that the last cumulative value is displayed at a
restart of the inverter and the cumulative meter restarts if the time elapsed between turning OFF and re-turning ON of the
inverter is shorter than an hour. (In some cases, the cumulative energy value may decrease.)
During stop
4 8
Average Average
4 8
Running
During stop
Power is off
Power
is off
12
16
Average
Average
12 16
Running
Time
Time
Pause
Clear (Pr.898=0)
(Pr.898=1)
Resume accumulation
(Pr.898=10 or 9999)
11.(M) Item and Output Signal for Monitoring
Time
20
Last value
Time
Stores Hi/Low when the
power is off and starts.
0 4
11.5 Energy saving monitoring
11
12
13
14
15
16
17
18
19
20
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