6-102
Note 1. This parameter cannot be changed during operation.
Note 2. N.A. = Not applicable.
• There is normally no need to change this setting.
• Set
this parameter when a high-speed motor is being used in the high-speed range (the high frequen
-
cy range above the base frequency).
The standard target setting is 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.)
L3-02
(Acceleration stall prevention level)
Output frequency
L3-03
(Acceleration stall prevention limit)
E1-06
Base frequency (F
A
)
• When
the
motor is used in the high-speed range, the acceleration stall prevention
level is automatically lowered to provide smoother acceleration.
The acceleration stall prevention limit (L3-03) limits how much the acceleration
stall
prevention level is lowered
so that it isn’t lowered any more than necessary
.
Acceleration stall
prevention 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
L3-04
StallP Decel Sel
0 to 3 --- 1 Basic or Advanced
Note This parameter cannot be changed during operation.
Setting Function
0 Disabled. (Decelerate according to the settings. Main circuit over-voltage may occur if the
deceleration time is too short.)
1 Enabled. (Stops deceleration if the main circuit voltage exceeds the over-voltage level. Decelerate
again when voltage recovers.)
2 Intelligent. (Decelerate as fast as possible judging from the main circuit voltage. Ignore the
deceleration time setting.)
3 Enabled. (Stall preventive function using a Braking Resistor or Braking Resistor Unit.)
• If the parameter is set to 1, the deceleration time will be automatically prolonged without using the
braking
function (i.e., without using a Braking Resistor or Braking Resistor Unit and Braking Unit) so
that the main circuit overvoltage (OV) will not result.
• Set
the parameter to
0 or 3 when using the braking function (i.e., using a Braking Resistor or Braking
Resistor
Unit and Braking Unit), otherwise the braking function cannot
be used and the deceleration
time will not be shortened. If 3 is set, part of deceleration time will be automatically prolonged to
pre
-
vent
main
circuit overvoltage (OV) with the braking function (a Braking Resistor or Braking Resistor
Unit
and Braking Unit) used. As a result, the possible set time will be shorter than that possible with the
parameter set to 0, and the deceleration time will be shortened as well. Set the parameter to 0, howev
-
er, if it is desired to decelerate the motor in the set deceleration time.
Advanced Operation Chapter
6
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