
6.5
Frequency limits and ramp times
The frequency range can be limited by setting a minimum and maximum frequency. For the
frequency setpoint, two different ramps can be parameterised. Change-over to ramp 2 can be
carried out manually or automatically.
Details
•
The acceleration time set refers to the acceleration from standstill to the maximum fre-
quency set. In the case of a lower setpoint selection, the actual acceleration time is reduced
accordingly.
•
The deceleration time set refers to the deceleration from the maximum frequency set to
standstill. In the case of a lower actual frequency, the actual deceleration time is reduced
accordingly.
•
Change-over to the acceleration and deceleration time set for ramp 2 is effected automati-
cally if
•
"Motor potentiometer" function is active, or
•
frequency setpoint (absolute value) > auto-change-over threshold
0x291B (PAR 224)
.
•
With the "Activate ramp 2" function, acceleration time 2 and deceleration time 2 can be
activated manually.
4
Activating ramp 2 manually
^
204
Parameter
Name / value range / [default setting]
Info
0x2915
(PAR 210)
Minimum frequency
(Min. frequency)
0.0 ... [0.0] ... 599.0 Hz
Lower limit value for all frequency setpoints.
0x2916
(PAR 211)
Maximum frequency
(Max. frequency)
0.0 ... [50.0] ... 599.0 Hz
Upper limit value for all frequency setpoints.
0x2917
(PAR 220)
Acceleration time 1
(Acceleration time 1)
0.0 ... [5.0] ... 3600.0 s
The acceleration time set refers to the acceleration from standstill to the
maximum frequency set. In the case of a lower setpoint selection, the
actual acceleration time is reduced accordingly.
0x2918
(PAR 221)
Deceleration time 1
(Deceleration time 1)
0.0 ... [5.0] ... 3600.0 s
The deceleration time set refers to the deceleration from the maximum
frequency set to standstill. In the case of a lower actual frequency, the
actual deceleration time is reduced accordingly.
0x2919
(PAR 222)
Acceleration time 2
(Acceleration time 2)
0.0 ... [5.0] ... 3600.0 s
The acceleration time set refers to the acceleration from standstill to the
maximum frequency set. In the case of a lower setpoint selection, the
actual acceleration time is reduced accordingly.
Acceleration time 2 is active if
•
"Motor potentiometer" function is active, or
•
frequency setpoint (absolute value) > auto-change-over threshold
0x291B (PAR 224)
, or
•
the trigger assigned in
0x2631:039 (PAR 400/039)
of the "Activate
ramp 2" function is TRUE.
0x291A
(PAR 223)
Deceleration time 2
(Deceleration time 2)
0.0 ... [5.0] ... 3600.0 s
The deceleration time set refers to the deceleration from the maximum
frequency set to standstill. In the case of a lower actual frequency, the
actual deceleration time is reduced accordingly.
Deceleration time 2 is active if
•
"Motor potentiometer" function is active, or
•
frequency setpoint (absolute value) > auto-change-over threshold
0x291B (PAR 224)
, or
•
the trigger assigned in
0x2631:039 (PAR 400/039)
of the "Activate
ramp 2" function is TRUE.
0x291B
(PAR 224)
Auto-changeover threshold of ramp 2
(Switch ramp)
0.0 ... [0.0] ... 599.0 Hz
Threshold for the automatic change-over to acceleration time 2 and
deceleration time 2.
•
A change-over is effected if the frequency setpoint (absolute value) >
auto-changeover threshold.
•
With the setting 0, the automatic change-over function is deactivated.
Basic setting
Frequency limits and ramp times
73
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