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15
ANTRIEBSTECHNIK
6
4
15
KEB COMBIVERT F4-C
Name: Basis
28.01.98
6
©
KEB Antriebstechnik, 1997
All Rights reserved
Functional Description
Set Value and Ramp Adjustment
Section
Page
Date
Chapter
f_soll
f_ist
t
t_rampe
t_rampe
t_rampe
t_rampe
t_rampe
At the ramp with constant time the acceleration and deceleration times adjusted with
oP.11...oP.14 always equal the real ramp times, independent of the set value. In this
operating mode S-curves are not possible. For acceleration the actual set value is
always used as reference value, for deceleration the last set values is always used.
Here a little example for the use of ramps with constant time:
Two conveyor belts run with different speed. 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.
Ramp with constant time
f_soll
f_ist
t
t_rampe
t_rampe
t_rampe
t_rampe
t_rampe
Picture 6.4.6.f
Forward acceleration with constant ramp time
Picture 6.4.6.g
Forward deceleration with constant ramp time
f_set
f_actual
f_set
f_actual