Mitsubishi Electric 800 Series Instruction Manual page 244

 Actual operation time monitoring (Pr.171, Pr.564)
• 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.)
• One hour is displayed as "0.001", and the value is counted up to "65.53".
• The values are stored in EEPROM every 10 minutes. The EEPROM is also updated at power OFF.
• When the cumulative energization time counter reaches 65535, it starts from 0 again. The number of times the actual
operation time counter reaches 65535 can be checked with Pr.564.
• Setting "0" in Pr.171 clears the actual operation time meter.
NOTE
• 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 values can be used for indication via terminal AM (analog voltage output), on communication options, and via
terminal AM0 (of the FR-A8AY). To check which items can be monitored with indication of negative numbers, refer to
Monitor description list (on
Negative numbers
Pr.290 setting
indication (via terminal AM)
0 (initial value) —
1 Enabled
4 —
5 Enabled
8 —
9 Enabled
12 —
13 Enabled
—: Negative numbers indication disabled (positive only)
*1 Negative numbers indication is disabled via RS-485 communication (Mitsubishi inverter protocol or MODBUS RTU).
NOTE
• When indication with negative numbers is enabled for the output via terminal AM/AM0 (analog voltage output), the output is
within the range of -10 to +10 VDC. Connect the meter with which output level is matched.
• The operation panel displays only unsigned numbers.
Description
page 237).
Negative numbers
indication (via
communication option)
—
—
Enabled
Enabled
—
—
Enabled
Enabled
Negative numbers indication (via
terminal AM0) (with the FR-A8AY)
*1
—
—
—
—
Enabled
Enabled
Enabled
Enabled
11.(M) Item and Output Signal for Monitoring
11.2 Monitor item selection on operation panel or via communication
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12
13
14
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16
17
18
19
20
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