14.10 Power Failure Time Deceleration-To-Stop Function - Mitsubishi Electric 800 Series Instruction Manual

14.10
Power failure time deceleration-to-stop function
V/F V/F V/F Magnetic flux Sensorless Sensorless Sensorless
Magnetic flux Magnetic flux
This is a function to decelerate the motor to a stop when an instantaneous power failure or undervoltage occurs.
Pr. Name
261 Power failure stop
A730 selection
 Power failure stop function (Pr.261 = "1")
• Even if power is restored during deceleration triggered by a power failure, deceleration stop is continued after which the
inverter stays stopped. To restart operation, turn the start signal OFF then ON again.
Pr.261=1
Power
supply
During deceleration at
occurrence of power failure
STF
Turn OFF STF once to make acceleration again
Y46
NOTE
• If the automatic restart after instantaneous power failure is selected (Pr.57 Restart coasting time ≠ "9999") while the power
failure time deceleration stop function is set enabled (Pr.261 = "1"), the power failure time deceleration stop function is
disabled.
• When the power failure time deceleration stop function is enabled (Pr.261 = "1"), the inverter does not start even if the power
is turned ON or inverter reset is performed with the start signal (STF/STR) ON. Turn OFF the start signal once and then ON
again to make a start.
Power supply
362
14. (A) Application Parameters

14.10 Power failure time deceleration-to-stop function

Initial Setting
value range
0
1
0
2
During stop at
occurrence of
power failure
Time
ON
Not started as inverter
is stopped due to power
failure
STF
OFF
ON
Y46
Description
The inverter output is shut off at an undervoltage or when a power
failure occurs.
The inverter decelerates the motor to a stop at an undervoltage or
when a power failure occurs.
The inverter decelerates the motor to a stop at an undervoltage or
when a power failure occurs.
The inverter re-accelerates the motor if the power restores during
the deceleration.
Output
frequency
Time
ON