Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 434

 Cumulative energization time / actual operation time monitoring (Pr.171,
Pr.563, Pr.564)
• Cumulative energization time monitoring (Pr.52 = "20") accumulates energization time from shipment of the inverter every
hour.
• On the actual operation time monitoring (Pr.52 = "23"), the inverter running time is added up every hour. (Time is not added
up during a stop.)
• When the cumulative value exceeds 65535, the meter is reset to 0 and restarts adding up. To check how many times the
cumulative energization time meter has exceeded 65535 h, use Pr.563. To check how many times the actual operation
time meter has exceeded 65535 hours, use Pr.564.
• Setting "0" in Pr.171 clears the actual operation time meter. (The cumulative energization time meter cannot be cleared.)
NOTE
• The cumulative energization time does not increase if the power is turned OFF after less than an hour.
• The actual operation time does not increase if the cumulative running time before power OFF is less than an hour.
• Once "0" is set in Pr.171, the setting of Pr.171 is always turned to "9999" afterwards. Setting "9999" does not clear the actual
operation time meter.
 Hiding the decimal places for the monitors (Pr.268)
• The numerical figures after a decimal point displayed on the operation panel may fluctuate during analog input, etc. The
decimal places can be hidden by selecting the decimal digits with Pr.268.
Pr.268 setting
9999 (initial value) No function
For the first or second decimal places (0.1 increments or 0.01 increments) of the monitor, numbers
0 in the first decimal place and smaller are rounded to display an integral value (1 increments). The
monitor value equal to or smaller than 0.99 is displayed as 0.
When monitoring with the second decimal place (0.01 increments), the 0.01 decimal place is
1 dropped and the monitor displays the first decimal place (0.1 increments). When monitoring with the
first decimal place, the display will not change.
NOTE
• The number of readout digits of the cumulative energization time (Pr.52 = "20"), actual operation time (Pr.52 = "23"),
cumulative energy (Pr.52 = "25"), and cumulative energy saving (Pr.52 = "51") does not change.
 Enabling display of negative numbers during monitoring (Pr.290)
• Negative signal outputs can be selected for the items monitored via terminal AM (analog voltage output), via a
communication option, and on the operation panel. To check which items can be monitored with indication of negative
numbers, refer to the monitor items list (on
Negative numbers
Pr.290 setting
indication (via terminal AM)
0 (initial value) —
1 Enabled
2 —
3 Enabled
4 —
5 Enabled
6 —
7 Enabled
—: Negative numbers indication disabled (positive only)
Description
page 425).
Negative numbers indication
on operation panel
—
—
Enabled
Enabled
—
—
Enabled
Enabled
Negative numbers indication (via
communication option)
—
—
—
—
Enabled
Enabled
Enabled
Enabled
5. PARAMETERS
5.11 (M) Item and output signal for monitoring
1
2
3
4
5
6
7
8
9
10
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