KEB COMBIVERT F5-A, Applications Manual, Page: 155 / 552

Setpoint, rotation- and ramp setting
© KEB, 2012-10 COMBIVERT F5-A, -E, -H Page 7.4 - 15
7
7.4.7 Setpoint calculation
The unit differentiates between two setpoint adjustments:
- the percentage setpoint adjustment
With the adjusted setpoint limits the speed range 0%...100% is defined. In this case the adjustment of 0%
corresponds to the minimal speed and 100% to the maximal speed.
The speed after the setpoint limiting is calculated according to following formula:
oP.10-oP.06
−−
100%
) positive setpoint = oP.06 + (setpoint setting [%] x
oP.11-oP.07
−−
100%
) negative setpoint = oP.07 + (setpoint setting [%] x
The absolute setpoint adjustment, i.e. the setpoint is directly adjusted as speed and limited through the
corresponding minimal and maximal values as well as through the absolute maximal values.
The setpoint sources are assigned as follows:
Setpoint adjustment in percent Absolute setpoint adjust-
ment
Terminal strip (analog setpoint) Keyboard/Bus absolute
Keyboard/bus in % Set speed value Sy.52
Motorpoti Speed measurement
Technology control High resolution
Fade out target for setpoint
Setting ranges are faded out with this function, in order to avoid resonances. The target is pass through with
the ramp. The setpoint value is always adjusted to the upper or lower limit of the target.
Parameter:
oP.65 min. proh. reference 1
oP.66 max. proh. reference 1
oP.67 min proh. reference 2
oP.68 max. proh. reference 2
The parameters are not programmable.
The adjusted values are accepted still as setpoint value, thus the function is not active in case that lower and
upper limit have the same value. If a higher value is selected for the lower limit than for the upper limit, the
function is also not active.