6 4
KEB COMBIVERT F4-C
10
Name: Basis
28.01.98
© KEB Antriebstechnik, 1997
All Rights reserved
Functional Description Set Value and Ramp Adjustment
Chapter Section
Page Date
(oP. 5)
-100% +100%
(oP. 8)
+f [Hz]
-f [Hz]
(oP. 7)
The unit differentiates between two set value settings:
- the percent set value setting, i.e. all values are converted in conformance with
the selected limit in percent. With the adjusted set value limits the frequency
range is defined. The setting 0 corresponds to the minimum frequency and 100
% correspond to the maximum frequency. The frequency after set value limitation
is calculated according to following formula:
Set value = f
min
+ (set value setting [%] x
∆f
)
100%
- the absolute set value setting, i.e. the set value is given directly in frequency
and is limited only by the adjusted maximum frequency.
The set value sources are assigned as follows:
Percent set value setting Absolute set value setting
Terminal strip Keyboard / Bus absolute
Keyboard / Bus in % Profile parameter absolute
Profile parameter in % Speed detection
Motor-poti
Pi-Controller
6.4.4 Set Value
Calculation
Picture 6.4.3.a Set value limits
Set value [%]
Set value [%]
Maximum
frequency forward
absolute maximum
frequency forward
Maximum
frequency reverse