KEB COMBIVERT F4-C Applications Manual page 131

Set Value and Ramp Adjustment
Ramp with constant time
© KEB Antriebstechnik, 1997
All Rights reserved
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.
Picture 6.4.6.f Forward acceleration with constant ramp time
f_set
f_soll
f_actual f_ist
t_rampe
Picture 6.4.6.g Forward deceleration with constant ramp time
f_set
f_soll
f_ist
f_actual
t_rampe
Name: Basis
KEB COMBIVERT F4-C
Functional Description
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Date
28.01.98
ANTRIEBSTECHNIK
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