Inverter Parts Life Display - Mitsubishi Electric 800 Series Instruction Manual

(E) Environment setting parameters
• When the PWM carrier frequency automatic reduction function is used, the operation with the carrier frequency set to 3 kHz
or higher (Pr.72  "3") automatically reduces the carrier frequency for heavy-load operation as shown below.
Pr.260 Pr.570
setting setting
0 (SLD),
1 (LD)
1
2 (ND),
3 (HD)
0 (SLD)
1 (LD)
0
2 (ND),
3 (HD)
NOTE
• Reducing the PWM carrier frequency is effective as a countermeasure against EMI from the inverter or for reducing leakage
current, but doing so increases the motor noise.
• When the PWM carrier frequency is set to 1 kHz or lower (Pr.72  1), the increase in the harmonic current causes the fast-
response current limit to activate before the stall prevention operation, which may result in torque shortage. In this case,
disable the fast-response current limit in Pr.156 Stall prevention operation selection.
• During fast-response operation, the carrier frequency automatic reduction function is disabled.
Parameters referred to ???????
Pr.156 Stall prevention operation selection
Pr.570 Multiple rating setting
Pr.800 Control method selection
5.7.16

Inverter parts life display

The degree of deterioration of the control circuit capacitor, main circuit capacitor, cooling fan, and inrush current limit
circuit can be diagnosed on the monitor.
When a part approaches the end of its life, an alarm can be output by self diagnosis to prevent a fault.
(Note that the life diagnosis of this function should be used as a guideline only, because with the exception of the main
circuit capacitor, the life values are theoretical calculations.)
Pr.
255
Life alarm status display
E700
256 Inrush current limit circuit life
E701 display

257 Control circuit capacitor life
E702 display
258 Main circuit capacitor life
E703 display

259 Main circuit capacitor life
E704 measuring


The setting range (reading only) for separated converter types is "0, 1, 4, or 5".

The setting is available only for standard models.
262
PARAMETERS
Carrier frequency automatic reduction operation
FR-A860-01080 or lower
Continuous operation with the 85% or higher inverter rated current reduces the carrier frequency automatically.
Operation with the 150% or higher inverter rated
current for the ND rating reduces the carrier frequency
automatically.
Continuous operation with the 85% or higher inverter rated current reduces the carrier frequency automatically.
Without carrier frequency automatic reduction
(Perform continuous operation with the carrier frequency set to 2 kHz or lower or with less than 85% of the
inverter rated current.)
Without carrier frequency automatic reduction
page 332
page 249
page 137
Initial
Name
value
0
100%
100%
100%
0
FR-A860-01440 or higher
Continuous operation with the 85% or higher inverter
rated current reduces the carrier frequency
automatically.
Without carrier frequency automatic reduction
(Perform continuous operation with the carrier
frequency set to 2 kHz or lower or with less than 85%
of the inverter rated current.)
Setting
range
Displays whether or not the parts of the control
circuit capacitor, main circuit capacitor, cooling
(0 to 15)

fan, and inrush current limit circuit have reached
the life alarm output level. Read-only.
Displays the deterioration degree of the inrush
(0 to 100%)
current limit circuit. Read-only.
Displays the deterioration degree of the control
(0 to 100%)
circuit capacitor. Read-only.
Displays the deterioration degree of the main
(0 to 100%) circuit capacitor. Read-only.
The value measured by Pr.259 is displayed.
Setting "1" and turning the power supply OFF
starts the measurement of the main circuit
capacitor life.
0, 1
If the setting value of Pr.259 becomes "3" after
(2, 3, 8, 9)
turning the power supply ON again, it means that
the measurement is completed. The deterioration
degree is read to Pr.258.
Description