KEB COMBIVERT F4-C - Page 131

15
ANTRIEBSTECHNIK
6
415
KEB COMBIVERT F4-C
Name: Basis
28.01.98
6
© KEB Antriebstechnik, 1997
All Rights reserved
Functional DescriptionSet Value and Ramp Adjustment
Section
Page
Date
Chapter
f_soll
f_ist
t
t_rampe
t_rampet_rampet_rampet_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_rampet_rampet_rampet_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