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Related Parameters - Toshiba TOSVERT VF-AS1 Manual

Current and speed control gain adjustment method
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1. Introduction
Thank you for purchasing a TOSVERT VF-AS1/PS1 industrial inverter.
This instruction manual explains the functions of the VF-AS1/PS1's parameters f458 through f466.
2. Function
2-1. Control gain adjustment function (f458 to f462)
When the inverter is operated in automatic torque boost mode or vector control mode (setting of parameter
pt: 2, 3, 4, 7 or 8), the speed response can be optimized according to the inertia of the load and
vibrations can be reduced.
The settings of these parameters do not need to be changed, if no problem arises when they are at their
factory defaults.
2-2. Speed control gain switching function (f463 to f466)
This function is used to change the speed response in low-speed and high-speed ranges when controlling
speed in vector control mode.
When the inverter is used with a load whose moment of inertia changes significantly according to the
operation frequency, response can be enhanced with this function.
To do so, first specify two kinds of speed control gains (proportional, stability factor and moment of inertia of
load), and then switch from one to the other using the frequency switching function (f466).
*1: This function is not provided for the VF-PS1.

3. Related parameters

Communi
Title
cation
Function
No.
Current control
f458 0458
proportional gain
Speed loop
f460 0460
proportional gain
Speed loop
f461 0461
stabilization
coefficient
Moment of inertia
f462 0462
of load 1
Second speed
f463 0463
loop proportional
gain
Second speed
f464 0464
loop stabilization
coefficient
Moment of
f465 0465
inertia of load 2
Speed PI
f466 0466
switching
frequency
Minimum
Adjustment
setting unit
range
(Panel/
Communication)
1/1
0~100
1/1
1~9999
1/1
1~9999
1/1
0~100
1/1
1~9999
1/1
1~9999
1/1
0~100
0.0~
1/1
Hz
- 1 -
*1
Vector control
Write
Default
during
Speed
setting
running
control
0
Disabled
●/●
12
Enabled
●/●
100
Enabled
●/●
35
Enabled
●/●
12
Enabled
●/●
100
Enabled
●/●
35
Enabled
●/●
0.0
Enabled
●/●
Sensorless vector/vector with sensor
E6581333
V/f
Note
Torque
Constant
control
AS1
●/●
-
only
AS1/
-
-
PS1
AS1/
-
-
PS1
AS1/
-
-
PS1
AS1
-
-
only
AS1
-
-
only
AS1
-
-
only
AS1
-
-
only
●: Effective, -: Ineffective

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