Mitsubishi Electric FR-F720-0.75K to 110K Instruction Manual page 155

Operation selection at power failure
and instantaneous power failure
Pr.261 = 1
Power
supply
During deceleration at
occurrence of power failure
During stop at
occurrence of
power failure
STF
Y46
Turn off STF once to make acceleration again
(4) Operation continuation at instantaneous power failure function (Pr. 261 = "2")
⋅ When power is restored during deceleration after an instantaneous power failure, acceleration is made again up to
the set frequency.
⋅ When this function is used in combination with the automatic restart after instantaneous power failure operation,
deceleration can be made at a power failure and acceleration can be made again after power restoration. When
power is restored after a stop by deceleration at an instantaneous power failure, automatic restart operation is
performed if automatic restart after instantaneous power failure has been selected (Pr. 57 ≠ "9999")
.
When power is restored during
Pr. 261 = 2
deceleration at occurrence of
power failure
Power
supply
Output
frequency
During deceleration
at occurrence of
power failure
Y46
* Acceleration time depends on Pr. 7 (Pr. 44 ).
(5) Power failure stop function (with DC bus voltage constant control) (Pr. 261 = "21").
Pr.261 = 21
Power
supply
During deceleration at
occurrence of power failure
Deceleration time: automatically adjusted
STF
Y46
Turn OFF STF once to make acceleration again
146
(3) Power failure stop function (Pr. 261 = "1")
⋅ If power is restored during power failure deceleration, deceleration
to a stop is continued and the inverter remains stopped. To restart,
turn off the start signal once, then turn it on again.
Time
IPF
Reacceleration*
Time
During stop at
occurrence of
power failure
Time
REMARKS
ON
Power supply
Not started as inverter
is stopped due to power
failure
STF
Y46
⋅
When automatic restart after instantaneous power failure is selected (Pr. 57
≠
"9999"), deceleration to stop function is invalid and the restart after
instantaneous power failure operation is performed.
⋅
After a power failure stop, the inverter will not start even if the power is
restarted with the start signal (STF/STR) input. After switching on the power
supply, turn off the start signal once and then on again to make a start.
Pr.261 = 2, Pr.57
9999
During power failure
Power
supply
Output
frequency
During deceleration
at occurrence of
power failure
Y46
⋅ Deceleration time is automatically adjusted to keep (DC bus)
voltage constant in the converter when the inverter
decelerates to a stop. Even if power is restored during power
failure deceleration, deceleration to a stop is continued and
the inverter remains stopped. To restart, turn OFF the start
signal once, then turn it ON again.
⋅ Setting Pr. 261 = "21" disables the settings of Pr. 262 to Pr. 266.
REMARKS
Power supply
STF
Y46
⋅
When automatic restart after instantaneous power failure is selected
≠
(Pr. 57 "9999"), deceleration to stop function is invalid and the restart
after instantaneous power failure operation is performed.
⋅
After a power failure stop, the inverter will not start if the power supply
is switched ON with the start signal (STF/STR) input. After switching
ON the power supply, turn OFF the start signal once and then ON
again to make a start.
Output
frequency
Time
OFF ON
When used with automatic restart
after instantaneous power failure
Automatic restart
after instantaneous
power failure
Reset time + Pr.57
ON
Not started as inverter
Output
is stopped due to power
frequency
failure
Time
OFF
ON
Time