Mitsubishi Electric FR-A800, Instruction Manual

Page: 760 / 1042

(A) Application parameters Parameters
5 - 580
5.14.16 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.
The power failure time deceleration stop function is available only for standard models and IP55 com-
patible models.
Connection and parameter setting
Pr.
Name
Initial value
Setting
range
Description
FM CA
261
A730
Power failure stop
selection
0
0
Power failure time deceleration-to-stop function
disabled
1, 2, 11, 12,
21, 22
Power failure time deceleration-to-stop function
enabled
Select action at an undervoltage or when an power
failure occurs.
262
A731
Subtracted frequency at
deceleration start
3 Hz 0 to 20 Hz
Normally, the motor runs at the initial value as it is.
However, adjust to suit the size of the load
specification (moment of inertia, torque).
263
A732
Subtraction starting
frequency
60 Hz 50 Hz
0 to 590 Hz
When output frequency
≥
Pr. 263
Output frequency - deceleration from Pr. 262
When output frequency < Pr. 263
Deceleration from output frequency
9999
The motor decelerates from the "output frequency -
Pr. 262".
264
A733
Power-failure deceleration
time 1
5 s 0 to 3600 s
Set the slope applicable from the deceleration start to
the Pr. 266 set frequency.
265
A734
Power-failure deceleration
time 2
9999
0 to 3600 s
Set the slope applicable for the frequency range
starting at Pr. 266 and downward.
9999 Same as Pr. 264.
266
A735
Power failure deceleration
time switchover frequency
60 Hz 50 Hz 0 to 590 Hz
Set the frequency at which the slope during
deceleration switches from the Pr. 264 setting to the
Pr. 265 setting.
294
A785
UV avoidance voltage gain 100% 0 to 200%
Adjust the response at undervoltage avoidance
operation. Setting a large value improves the
response to changes in the bus voltage.
668
A786
Power failure stop
frequency gain
100% 0 to 200%
Adjust the response level for the operation where the
deceleration time is automatically adjusted.
606
T722
Power failure stop external
signal input selection
1
0 Normally open input (NO contact input specification)
1
Normally closed input (NC contact input
specification)
Fig. 5-289:
Connection of the standard model
I001172E
Power supply
Inverter
Remove the jumper
Connect terminals
R1/L11 and P/+
and terminals
S1/L21 and N/–.