Power-Failure Deceleration Stop Function (Pr. 261) - Mitsubishi Electric FR-E720-008 Instruction Manual

Operation selection at power failure and instantaneous power failure

4.13.2 Power-failure deceleration stop function (Pr. 261)

When a power failure or undervoltage occurs, the inverter can be decelerated to a stop or can be decelerated and re-
accelerated to the set frequency.
Parameter
Name
Number
Power failure stop
261
selection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 187)
Power
ON
Pr. 261 = 1
Power
During deceleration
at occurrence of power failure
During stop
at occurrence
of power failure
STF
Y46
Turn OFF STF once to make acceleration again
REMARKS
When automatic restart after instantaneous power failure is selected (Pr. 57 ≠ "9999"), power failure stop function is invalid and
automatic restart operation after instantaneous power failure is valid.
When the power failure deceleration stop function is active (Pr. 261 = "1"), the inverter will not start even if the power is turned
ON with the start signal (STF/STR) ON. After switching ON the power, turn OFF the start signal once and then ON again to
make a start.
Initial Setting
Value Range
0
1
0
2
(1) Parameter setting
OFF
When Pr. 261 is set to "1" or "2", the inverter decelerates to a
stop if an undervoltage or power failure occurs.
Pr. 261 = 0
Pr. 261 = 1, 2
(2) Operation outline of deceleration to stop at power
failure
When undervoltage or power failure has occurred, the output
Time
frequency is decreased and controlled so that the converter
circuit (DC bus) voltage is constant and decreased to 0Hz to
stop.
(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
ON
Power
Not started as inverter
is stopped due to
power failure
STF
Y46 ON
Description
Coasts to stop.
When undervoltage or power failure occurs, the inverter output
is shut off.
When undervoltage or a power failure occurs, the inverter can
be decelerated to a stop.
When undervoltage or a power failure occurs, the inverter can
be decelerated to a stop.
If power is restored during a power failure, the inverter
accelerates again.
Output frequency
Time
OFF
ON
4
167