Frequency Limits And Ramp Times - Lenze i55AE125B Manual

Basic setting

Frequency limits and ramp times

7.6 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 frequency setpoint is internally led via a ramp generator.
The acceleration time set in
•
the maximum frequency set in
acceleration time decreases accordingly.
The deceleration time set in
•
mum frequency to standstill. In case of a lower actual frequency, the actual deceleration
time is reduced accordingly.
Input signals
Frequency setpoint selection
Output signals
Output frequency
0x2DDD
Automatic/manual change-over to ramp 2
For ramp 2, the acceleration time 2 set in
•
set in 0x291A (P223.00)
The change-over to ramp 2 is effected automatically if the frequency setpoint (absolute
•
value) ≥ auto-changeover threshold
Input signals
Frequency setpoint selection
Output signals
Output frequency
0x2DDD
The "Activate ramp 2" function serves to manually activate the acceleration time 2 and the
•
deceleration time 2. 4Activating ramp 2 manually
Parameter Name / value range / [default setting]
0x2915 Minimum frequency
(P210.00) (Min. frequency)
0.0 ... [0.0] ... 599.0 Hz
0x2916 Maximum frequency
(P211.00) (Max. frequency)
Device for 50-Hz mains: 0.0 ... [50.0] ... 599.0 Hz
Device for 60-Hz mains: 0.0 ... [60.0] ... 599.0 Hz
156
0x2917 (P220.00) refers to an acceleration from standstill to
0x2916 (P211.00). At a low setpoint selection, the real
0x2918 (P221.00) refers to the deceleration of the set maxi-
60 Hz
50 Hz
40 Hz
30 Hz
20 Hz
10 Hz
0 Hz
60 Hz
50 Hz
40 Hz
30 Hz
20 Hz
10 Hz
0 Hz
0x2917
0x2919 (P222.00)
apply.
0x291B (P224.00).
60 Hz
50 Hz
40 Hz
30 Hz
20 Hz
10 Hz
0 Hz
60 Hz
50 Hz
40 Hz
30 Hz
20 Hz
10 Hz
0 Hz
^ 576
0x2916
0x2918
and the deceleration time 2
Ramp 2 active
Ramp 1 active
Info
Lower limit value for all frequency setpoints.
Upper limit value for all frequency setpoints.
0x291B = 20 Hz
t
t
t
t