Vacon 100X series, Applications Manual

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Parameters vacon • 128
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6
6.2.7 Ramps And Brakes
P3.4.1.2 A
CCEL
T
IME
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 D
ECEL
T
IME
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 frequen-
cy 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 avail-
able as parameters in MPPT group, but it is suggested not to change them, unless needed be-
cause of stability issues.
P3.4.1.4 S
TART 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 decel-
eration 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.