User manual

Page 69
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSI 9000 2U Series
By linking together a number of differently congured sequences, complex progressions can be created. Smart
conguration of the arbitrary generator can be used to match triangular, sine, rectangular or trapezoidal wave func-
tions and thus, e.g. a sequence of rectangular waves with differing amplitudes or duty cycles could be produced.
Assignment to either U or I makes up to 100 sequences available for either current or voltage
but not a mix. That means that a sequence X which produces a ramp up on current cannot be
followed by sequence Y which applies a sine wave to the voltage.
Schematic diagram: Applications and results:
t
A
Example 7
Focussing 1 cycle of 2 sequences from 100:
A sequence congured as in example 3 is run.
As the settings demand that the end offset (DC)
is higher than the start, the second sequence
run will revert to the same start level as the rst,
regardless of the values achieved at the end of
the rst run. This can produce a discontinuity
in the total progression (marked in red) which
may only be compensated with careful choice
of settings.
t
A
Sequence 1 Sequence 2
Example 8
Focussing 1 cycle of 2 sequences from 100:
Two sequences run consecutively. The rst
generates a sine wave with increasing ampli-
tude, the second with a decreasing amplitude.
Together they produce a progression as shown
left. In order to ensure that the maximum wave
in the middle occurs only once, the rst se-
quence must end with a positive half wave and
the second start with a negative half wave as
shown in the diagram..
t
A
Sequence 1 Sequence 2 Seq. 3 Sequence 4
Example 9
Focussing 1 cycle of 4 sequences from 100:
Sequence 1: 1/4th sine wave (angle = 270°)
Sequence 2: 3 Sine waves (relationship fre-
quency to sequence time: 1:3)
Sequence 3: Horizontal ramp (f = 0)
Sequence 4: Falling ramp (f = 0)