Increase Cooling Fan Life; Slip Compensation; Selection Of Motor Stopping Method And Start Signal; Input/Output Phase Failure Protection Selection - Mitsubishi Electric FR-A700 Manual

Pr.
Pr.
244

Increase cooling fan life

Pr.244 Cooling fan operation selection
You can control the operation of the cooling fan (200V class 1.5K
or more, 400V class 2.2K or more) built in the inverter.
Pr.244 Setting
Operates at power on
0 Cooling fan on/off control invalid (the cooling fan is
always on in power-on status)
Cooling fan on/off control valid
1
The fan is always on while the inverter is running.
(initial value) During a stop, the inverter status is monitored and the
fan switches on-off according to the temperature.
Pr.
Pr.
245 to 247

Slip compensation

Pr.245 Rated slip
Pr.247 Constant-power region slip compensation selection
The inverter output current may be used to assume motor slip to
keep the motor speed constant.
Pr.
Pr.
250
Selection of motor stopping method and
start signal
Pr.250 Stop selection
Used to select the stopping method (deceleration to a stop or
coasting) when the start signal turns off.
Used to stop the motor with a mechanical brake, etc. together with
switching off of the start signal.
You can also select the operations of the start signals (STF/STR).
Pr.250
Start signal
Setting
(STF/STR)
0 to STF signal: Forward rotation start
100s STR signal: Reverse rotation start
1000s to STF signal: Start signal
1100s STR signal: Forward/reverse signal
STF signal: Forward rotation start
9999
STR signal: Reverse rotation start
STF signal: Start signal
8888
STR signal: Forward/reverse signal
When "9999 (initial value) or "8888" is set in Pr.250
Start
ON
signal
RUN
signal
When a value other than "9999 (initial value) or "8888" is set in Pr.250
ON
Start signal
ON
RUN signal
61
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Description
V/F V/F V/F
Pr.246 Slip compensation time constant
Description
Stop operation
The motor is coasted to a
stop when the preset time
elapses after the start
signal is turned off.
The motor is coasted to a
stop (Pr. 250 - 1000)s after
the start signal is turned off.
When the start signal is
turned off, the motor
decelerates to stop.
Deceleration starts
when start signal turns off
Deceleration time
(Time set in Pr. 8, etc.)
DC brake
Time
OFF
ON OFF
Output is shut off when set
time elapses after start signal
turns off
Pr.250
Motor coasts to stop
Time
OFF
OFF
Pr.
Pr.
251, 872

Input/output phase failure protection selection

Pr.251 Output phase failure protection selection
Pr.872 Input phase failure protection selection
You can disable the output phase failure protection function that
stops the inverter output if one of the inverter output side (load
side) three phases (U, V, W) opens.
The input phase failure protection selection of the inverter input
side (R, S, T) can be made valid.
Pr. Number Setting Range
0
251
1 (initial value)
0 (initial value)
872
1
Pr. Pr.
252, 253
Refer to the section about Pr.73.
Pr.
Pr.
255 to 259
Display of the life of the inverter parts
Pr.255 Life alarm status display
Pr.257 Control circuit capacitor life display
Pr.259 Main circuit capacitor life measuring
Degrees of deterioration of main circuit capacitor, control circuit
capacitor or inrush current limit circuit and cooling fan can be
diagnosed by monitor.
When any part has approached the end of its life, an alarm can be
output by self diagnosis to prevent a fault.
(Use the life check of this function as a guideline since the life
except the main circuit capacitor is calculated theoretically.)
Pr. Setting
Number Range
Display whether the control circuit capacitor,
main circuit capacitor, cooling fan, and each
255 (0 to 15) parts of the inrush current limit circuit has
reached the life alarm output level or not.
Reading only
Display the deterioration degree of the inrush
256 (0 to 100%)
current limit circuit. Reading only
Display the deterioration degree of the control
257 (0 to 100%)
circuit capacitor. Reading only
Display the deterioration degree of the main
258 (0 to 100%) circuit capacitor. Reading 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.
259 0, 1
When the Pr.259 value is "3" after powering on
again, the measuring is completed.Read the
deterioration degree in Pr.258 .
Description
Without output phase failure
protection
With output phase failure protection
Without input phase failure protection
With input phase failure protection
Pr.256 Inrush current limit circuit life display
Pr.258 Main circuit capacitor life display
Description