6-103
• When this parameter is set to 3, in contrast to a setting of 0, the deceleration time is automatically
prolonged with main axis overvoltage (OV) easily detected. Therefore the actual deceleration time
becomes
longer than the deceleration time that has been set. This can be adjusted, however
, by set
-
ting
a shorter deceleration time than for the 0 setting,
so that the actual deceleration time will also be
shorter.
Note The parameter cannot be set to 3 in flux vector control.
Deceleration Stall Prevention Example: L3-04 = 1
Output frequency
The deceleration time is controlled
to prevent overvoltage.
Time
Deceleration time
(set value)
Parameter Display name Setting Units Default
Valid access levels
number
range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
L3-05
StallP Run Sel
0 to 2 --- 1 Basic or Advanced Not applicable.
Note This parameter cannot be changed during operation.
Setting Function
0 Disabled. (Run according to the settings. Stalls may occur with large loads.)
1 Enabled – deceleration time 1. (Use deceleration time in C1-02 for stall prevention function.)
2 Enabled – deceleration time 2. (Use deceleration time in C1-04 for stall prevention function.)
• When
setting 1 or 2 (enabled) is selected, deceleration is started if the run stall prevention level’
s
cur
-
rent continues for more than 100 ms. The motor is accelerated back to the reference frequency again
when the current falls below this level.
Parameter Display name Setting Units Default
Valid access levels
number
range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
L3-06 StallP Run Level 30 to 200 % 160 Basic or Advanced Not applicable.
Note This parameter cannot be changed during operation.
• This setting is valid when L3-05 is set to 1 or 2.
• Normally it isn’t necessary to change this setting.
• Decrease
this setting when the motor
’
s capacity
is small compared to the Inverter
’
s capacity or stalling
occurs
when the motor is operated with the default setting. The standard target setting is 2
to 3 times
the
motor
’
s rated current. (Set this current value as a percentage of the Inverter
’
s rated current, i.e.,
100% corresponds to the Inverter’s rated current.)
Advanced Operation Chapter
6
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