Lenze i550

Notes:
•
Two dierent ramps can be parameterised for the frequency setpoint. The calculaon of
the speed compensaon is based on the acve delay me at the point of the stop com-
mand, either delay me 1 or delay me 2.
•
No speed compensaon is implemented if the delay me is acve for the quick stop.
•
No adjustment to the speed compensaon takes place if the delay is changed from decel-
eraon me 1 0x2918 (P221.00) to delay me 2 0x291A (P223.00) or vice versa during
deceleraon. The change-over is ignored.
•
The threshold for automac change-over to acceleraon me 2 and deceleraon me 2 is
ignored during deceleraon if this stop method is selected.
•
If the motor accelerates or decelerates at the me of the stop command, the speed com-
pensaon is calculated based on the output frequency at that me.
•
There is a congurable stop threshold 0x291E:003 (P226.03) which denes the speed
range within which the stop funcon is acve and NOT acve. The stop threshold value is
congurable from 0.0% to 100.0%. The percentage refers to the maximum fre-
quency 0x2916 (P211.00). The standard seng for the threshold value for the speed-com-
pensated stop is 10.0%. When stopping from a speed that is greater or equal to the stop
threshold value, the stop funcon is acve. When stopping from a speed that is smaller
than the stop threshold value, the stop funcon is NOT acve; normal deceleraon takes
place.
•
The performance of the speed compensaon depends on several factors: motor control
type, total capacity of the system mechanics, mass inera, system fricon, etc. These fac-
tors can inuence the calculaon of motor revoluons and consistency. Since the mechani-
cal and physical properes of the system cannot be inuenced by the inverter, the system
designer has to congure and test the speed compensaon for suitability in the actual
applicaon.
•
The general relave performance can be esmated on the part of the inverter based on
the selected motor control type:
Motor control type 0x2C00 (P300.00)
V/f characterisc control (VFC open
loop) [6]
Sensorless vector control (SLVC) [4] Sensorless control (SL PSM) [3] Servo control (SC ASM) [2]
Performance
Parameter
Address Name / seng range / [default seng] Info
0x291E:003
(P226.03)
S-Ramp characterisc: Stop threshold
(S-ramp char.: Stop threshold)
0.0 ... [10.0] ... 100.0 %
•
From version 05.03
•
Congurable stop threshold value which denes the speed range in
which the stop funcon is acve and NOT acve.
•
100 % ≡ maximum frequency (0x2916 (P211.00)).
Related topics
4Ramp mes ^ 84
4Change over to ramp 2 during operaon ^ 143
Conguring the frequency control
"Switch-o posioning" stop mode
147