User manual

Page 55
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
EL 9000 T Series
3.10.10 Arbitrary function
Thearbitrary(freelydenable)functionofferstheuserfurtherscope.Upto100sequencesareavailableforuse
forcurrentIandvoltageU,allofwhichhavethesameparametersbutwhichcanbedifferentlyconguredsothat
a complex function process can be built up. The 100 sequences can run one after another in a sequence block,
and this sequence block can then be repeated many times or endlessly. From the 100 sequences a block can be
freelydenedtorunfromsequencextosequencey.Asequenceorsequenceblockactsonlyoncurrentorvolt-
age, thus a mix of assignment to current I or voltage U is not possible.
The arbitrary curve overlays a linear progression (DC) with a sine curve (AC), whose amplitude and frequency
are shaped between start and end values. If the start frequency (Fs) = end frequency (Fe) = 0 Hz the AC values
have no impact and only the DC part is effective. Each sequence is allocated a sequence time in which the AC/
DCcurvefromstarttonishwillbegenerated.
Thefollowingparameterscanbeconguredforeachsequenceinthearbitraryfunction(thetablelistsparameters
for current, for voltage it would be Us, Ue etc.)
Value Range Seq. Description
ACs 0...50% nominal value of U, I 1-100 Start amplitude of the sine wave part of the curve (AC)
ACe 0...50% nominal value U, I 1-100 End amplitude of the sine wave part of the curve (AC)
DCs ACs...(Nominal value - ACs) of U, I 1-100 Start value of the DC part of the curve
DCe ACe...(Nominal value - ACe) of U, I 1-100 End value of the DC part of the curve
S.Freq 0 Hz...10000 Hz 1-100 Start frequency of the sine wave part of the curve (AC)
E.Freq 0 Hz...10000 Hz 1-100 End frequency of the sine wave part of the curve (AC)
Angle 0 °...359 ° 1-100 Start angle of the sine wave part of the curve (AC)
Time 0.01 ms...36000 s 1-100 Time for the selected sequence
The sequence time (“Time”) and the start and end frequency are related. The minimum value
for Δf/s is 9.3. Thus, for example, a setting of S.Freq = 1 Hz, E.Freq = 11 Hz and Time = 5 s
would not be accepted as Δf/s is only 2. A sequence time of 1 s would be accepted or, if the
time remains at 5 s, then E.Freq = 51 Hz or higher must be set .
The amplitude change between start and end is related to the sequence time. A minimal change
over an extended time is not possible and in such a case the device will report an inapplicable
setting.
AfterthesettingsfortheselectedsequenceareacceptedwithSAVE,furthersequencescanbecongured.If
the button NEXT is touched a second settings screen appears in which global settings for all 100 sequences are
displayed.
The following parameters can be set for the total run of an arbitrary function:
Value Range Description
Start seq. 1...End seq. First sequence in the sequence block
End seq. Start seq...100 Last sequence in the sequence block
Seq. Cycles ∞oder1...999 Number of cycles of the sequence block.
Schematic diagram: Applications and results:
Start (DC)
t
A
Start (AC)
Seq.time
End (DC)
Example 1
Focussing 1 cycle of 1 sequence from 100
DC values for start and end are the same, also the AC amplitude.
With a frequency >0 a sine wave progression of the set value is
generatedwithadenedamplitude,frequencyandYshift(offset,
DC value at start and end)
The number of sine waves per cycle depend on the sequence time
and the frequency. If the sequence time were 1 s and the frequency
1 Hz, there would be exactly 1 sine wave. If the time were 0.5 s at
the same frequency, there would only be a half sine wave.