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Power Failure Time Deceleration-to-stop Function - Mitsubishi Electric FR-CS84-012 Instruction Manual

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• Normally, the motor runs at the initial value as it is. However, adjust to suit the moment of inertia (J) of the load or the size
of the torque.
 Adjustment of restart operation (Pr.165, Pr.611)
• The stall prevention operation level at a restart operation can be set in
• Using
, the acceleration time to reach
Pr.611
be set. This can be set individually from the normal acceleration time.
NOTE
• Changing the terminal assignment using Pr.178 to Pr.182 (Input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
• The SU and FU signals are not output during the restart. These signals are output after the restart cushion time passes.
Parameters referred to
Pr.7 Acceleration time, Pr.21 Acceleration/deceleration time increments
Pr.13 Starting frequency
Pr.65, Pr.67 to Pr.69 (Retry function)
Pr.78 Reverse rotation prevention selection
Pr.178 to Pr.182 (Input terminal function selection)

5.10.4 Power failure time deceleration-to-stop function

At instantaneous power failure or undervoltage, the motor can be decelerated to a stop or to the set frequency for the re-
acceleration.
Pr.
Name
261
Power failure stop
A730
selection
 Action setting at undervoltage and power failure
• Set
to select the action at an undervoltage and power failure.
Pr.261
Pr.261
Action at undervoltage and power failure
setting
0
Output shutoff
1
Output is controlled to decelerate the motor to
a stop.
2
 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
Output frequency
STF
Y46
160
5. PARAMETERS
5.10 (A) Application parameters
Pr.20 Acceleration/deceleration reference frequency
page 99
page 115
page 108
page 142
Initial
Setting
value
range
0
0
1, 2
During deceleration at
occurrence of power failure
During stop at
occurrence of
power failure
Turn OFF STF once to make acceleration again
Pr.165
page 93
Power failure time deceleration-to-stop function disabled
Power failure time deceleration-to-stop function enabled
Select action at an undervoltage or when a power failure occurs.
Power restoration during
deceleration at occurrence of
power failure
Output is controlled to decelerate
the motor to a stop.
Re-acceleration
Time
.
after a restart operation can
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