Chapter 6 - Parameter Description
6-14
DC Braking is activated.
FG1-26 is the setting for DC Braking operating
time.
FG1-27 is the setting for DC Braking current as a
percentage of the Motor FLA.
The DC Braking mode is useful for low duty cycle
stopping of low inertia high speed loads such as
saw blade, spindle etc. Frequent use of DC Braking
mode can cause the motor to overheat.
) 4+
>
The Safety Stop
function is used to
prevent potential danger when the whole system is
stopped by power outage but the load keeps
spinning due to high load inertia. The VFD will use
regenerative power from the motor to decelerate
motor instead of coast stop. The Load Inertia rate
parameter FG2-46 determines the deceleration time
during safety stop. The highest FG2-46 value
represents the lowest load inertia and VFD will
calculate shortest DECEL time. If Load Inertia rate
is set to low value (high inertia system), the VFD
can trip on overvoltage.
) 5+
!
" 2' !
The Line Frequency
parameter should be set
to match the power line frequency 50Hz or 60Hz. If
Line Frequency parameter is changed from 60Hz to
50Hz, the FG1-30 and FG1-31 parameters will
automatically be changed to 50Hz. They can
manually be programmed back to 60Hz.
).*+
:
'
' ' " 2' !
The FG1-30 parameter
should be set to the
maximum output frequency that VFD can produce
at full speed reference signal. For most standard
industrial motors it should be set to 50Hz or 60Hz.
). + ;
" 2' !
The FG1-31 parameter
should be set to the
motor nameplate frequency rating. The VFD will
produce full voltage output at Base frequency. If
Maximum Frequency is set to 70Hz, Base to 60Hz
and Motor Voltage to 230V, the VFD during
acceleration will output 230V at 60Hz and from this
point increase only frequency to 70Hz.
). + " !- " 2' !
The FG1-32 Starting
Frequency parameter is
set to 0.5Hz as a default and normally it should not
be changed. This parameter determines from which
frequency VFD will start generating output to a
motor.
)/*+
# " C
"!
The FG1-40 parameter
has three selections:
Linear, Square and User V/F.
Linear
pattern is a basic control pattern and can be
used for constant and variable torque applications.
This pattern maintains a linear Volts/Hz ratio from
zero to base frequency. The motor control can be
improved with proper Torque Boost level settings.
Square
pattern is used for variable torque
applications such as fans, pumps etc. This pattern
maintains squared Volts/Hertz ratio creating slow
acceleration on 2/3 of the Base Frequency.
User V/F
pattern is used for special applications
with up to five different Volts/Frequency ratio step
requirements. The User V/F curve can have one or
two standard V/F segments and up to three custom
V/F ratio segments. The parameters FG1-41~48
define Voltage and Frequency for each point on the
FG1 Safety Stop
28 Yes
FG1 Line Freq
29 60.00 Hz
FG1 Max Freq
30 60.00 Hz
FG1 Base Freq
31 60.00 Hz
FG1 Start Freq
32 0.50 Hz
FG1 V/F Pattern
40 Linear
Output Voltage
Output
Frequency
Base
Freq.
100%
Max.
Freq.
Output Voltage
Output
Frequency
Base
Freq.
100%
Max.
Freq.
Summary of Contents for CI-007-P2
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Page 110: ...Chapter 6 Parameter Description 7 4 PID control with Pipe Broken function diagram...
Page 111: ...Chapter 6 Parameter Description 7 4 7 5 PID control with Pre PID function diagram...
Page 112: ...Chapter 6 Parameter Description 7 5 7 6 PID Control Setting Notes...
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