9122
Motor potentiometer parameters
Pos. Description
1 Frequency Reference
2 Max Frequency
3 Min Frequency
4 Motor potentiometer UP
5 Motor potentiometer DOWN
6 Motor potentiometer ramp time
7 Time [s]
8.2.7 Ramps And Brakes
P3.4.1.2 Accel Time 1
Ramp time, referred to variation from zero frequency
to max frequency.
A specific acceleration time from zero to minimum
frequency is available (P2.9).
Normal acceleration time (P1.3) is active only in case
power is from mains supply.
P3.4.1.3 Decel Time 1
Ramp time, referred to variation from max frequency
to zero.
Normal deceleration time (P3.4.1.3) is active in mains
supply and in case the external frequency reference
is lowered below the reference of maximum power. It
is also active when start command falls and ramping
stop is programmed (stop mode is anyway by
coasting, when the output frequency is below
minimum).
Specific acceleration and deceleration time are used
during power regulation. They are available as
parameters in MPPT group, but it is suggested not to
change them, unless needed because of stability
issues.
P3.4.1.4 Start Acceleration Time
A specific acceleration time from zero to minimum
frequency is available (P3.4.1.4). Normal acceleration
time (P3.4.1.3) is active only in case power is from
mains supply. Normal deceleration time (P3.4.1.4) is
active in mains supply and in case the external
frequency reference is lowered below the reference of
maximum power. It is also active when start
command falls and ramping stop is programmed
(stop mode is anyway by coasting, when the output
frequency is below minimum).
Specific acceleration and deceleration time are used
when power is from solar panels. They are available
as parameters in MPPT group, but it is suggested not
to change them, unless needed because of stability
issues.
8.2.8 Flux Braking
P3.4.5.1 Flux Braking
Instead of DC braking, flux braking is a useful way to
raise the braking capacity in cases where additional
brake resistors are not needed.
When braking is needed, the frequency is reduced
and the flux in the motor is increased, which in turn
increases the motor's capability to brake. Unlike DC
braking, the motor speed remains controlled during
braking.
The flux braking can be set ON or OFF.
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English (GB)
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