Mitsubishi Electronics FR-A500 Manuel D’Utilisation
172
4.2.59 Power failure-time deceleration-to-stop function (Pr. 261 to Pr. 266)
Pr. 261"power failure stop selection"
Pr. 262"subtracted frequency at deceleration
start"
Pr. 263"subtraction starting frequency"
Pr. 264"power-failure deceleration time 1"
Pr. 265"power-failure deceleration time 2"
Pr. 266"power-failure deceleration time switch-over frequency"
When an instantaneous power failure or undervoltage occurs, the inverter can be decelerated to a stop.
z
Remove the jumpers from across terminals R-R1 and terminals S-S1 and connect terminal R1 to terminal P
and terminal S1 to terminal N.
<Setting>
Parameter
Number
Factory Setting
Setting Range
261
0
0, 1
262
3Hz
0 to 20Hz
263
60Hz
0 to 120Hz, 9999
264
5 s
0 to 3600/0 to 360 s
265
9999
0 to 3600/0 to 360 s, 9999
266
60Hz
0 to 400Hz
Parameter
Number
Setting
Description
261
0
Coasting to stop
When undervoltage or power failure occurs, the inverter output is shut off.
When undervoltage or power failure occurs, the inverter output is shut off.
1
When undervoltage or power failure occurs, the inverter is decelerated to a stop.
262
0 to 20Hz
Normally, operation can be performed with the factory setting unchanged. The frequency can
be adjusted within the range 0 to 20Hz according to the load specifications (moment of inertia,
torque).
be adjusted within the range 0 to 20Hz according to the load specifications (moment of inertia,
torque).
263
0 to 120Hz
If the output frequency at occurrence of undervoltage or power failure is equal to or greater
than the frequency set in Pr. 263, deceleration starts at the value found by subtracting the
frequency set in Pr. 262 from the output frequency at that time. If the output frequency at
occurrence of undervoltage or power failure is less than the frequency set in Pr. 263, the
inverter is decelerated to a stop, starting at the output frequency at that time.
than the frequency set in Pr. 263, deceleration starts at the value found by subtracting the
frequency set in Pr. 262 from the output frequency at that time. If the output frequency at
occurrence of undervoltage or power failure is less than the frequency set in Pr. 263, the
inverter is decelerated to a stop, starting at the output frequency at that time.
9999
The inverter is decelerated to a stop, starting at the value found by subtracting the frequency
set in Pr. 262 from the output frequency at occurrence of undervoltage or power failure.
set in Pr. 262 from the output frequency at occurrence of undervoltage or power failure.
264
Pr. 21 = 0
0 to 3600 s
Set a deceleration slope down to the frequency set in Pr. 266. Set the slope in terms of time
required for deceleration from the frequency set in Pr. 20 to 0Hz.
required for deceleration from the frequency set in Pr. 20 to 0Hz.
Pr. 21 = 1
0 to 360 s
265
Pr. 21 = 0
0 to 3600 s
Set a deceleration slope below the frequency set in Pr. 266. Set the slope in terms of time
required for deceleration from the frequency set in Pr. 20 to 0Hz.
required for deceleration from the frequency set in Pr. 20 to 0Hz.
Pr. 21 = 1
0 to 360 s
9999
Same slope as in Pr. 264
266
0 to 400Hz
Set the frequency at which the deceleration slope is is switched from the Pr. 264 setting to the
Pr. 265 setting.
Pr. 265 setting.
R elated param eters
Pr. 12 "DC injection brake voltage"
Pr. 20 "acceleration/deceleration
Pr. 20 "acceleration/deceleration
reference frequency"
Pr.262
Pr.264
Pr.265
Pr.266
Time
Power supply
Ou
tpu
t fr
eque
ncy (
H
z
)
Switch-over frequency
Subtracted frequency
Power-failure deceleration time 1
Power-failure deceleration time 2