KEB COMBIVERT F5 BASIC - Page 165

6
415
KEB COMBIVERT F5-G / B
Name: Basis
06.02.02
6
© KEB Antriebstechnik, 2002
All rights reserved
Functional DescriptionSet Value and Ramp Adjustment
Section PageDate Chapter
6.4.8 Limiter (oP.36...41)
The setpoint after the ramp generator can be changed for example through slip
compensation. Before the setpoint triggers the modulator, it is once again limited.
So the limiter determines the minimal and maximal output frequency and can be
programmed differently in all sets.
If the frequency drops below the adjusted minimal output frequency, the modulation
is switched off. For oP.37 = „=For“, the value for clockwise-rotation oP.36 is valid.
Setting range oP.36 0...400 Hz Default: 0 Hz
Setting range oP.37 =For; 0...400 Hz Default: =For
If the frequency rises above the adjusted maximal output frequency, it is limited
onto the adjusted value. For oP.41 = „=For“, the value for clockwise-rotation oP.40
is valid.
Setting range oP.40 0...400 Hz Default: 200 Hz
Setting range oP.41 =For; 0...400 Hz Default: =For
Minimal output frequency clockwise
rotation (oP.36)
Minimal output frequency counter-
clockwise rotation (oP.37)
Maximal output frequency
clockwise rotation (oP.40)
Maximal output frequency counter-
clockwise rotation (oP.41)
6.4.9 Ramp with constant
time
At the ramp with constant time the acceleration and deceleration times adjusted
with oP.28...oP.31 always equal the real ramp times, independent of the set value.
In this operating mode S-curves are not possible.
Here a little example for the use of ramps with constant time:
Two conveyor belts run with different speeds. Both of them receive the Stop-
command at the same time. The belts reduce the speed in proportion to the adjusted
time and come to a standstill simultaneously.
f_soll
f_ist
t
t_rampe
t_rampet_rampet_rampet_rampe
Fig. 6.4.9.a Forward acceleration with constant ramp time
f_soll
f_ist