User Manual

Page 68
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSB 9000 2.5 kW Series
AfterthesettingsfortheselectedsequencepointareacceptedwithSAVE,furtherpointscanbecongured.Ina
second settings screen, which can be reached by tapping NEXT in the sequence point selection screen, following
global settings for all 99 points are adjustable:
Value Range Description
Start seq. 1...End seq. First sequence point in the block
End seq. Start seq...99 Last sequence point in the block
Seq. Cycles ∞or1...999 Number of cycles to run the block
Schematic diagram: Applications and results:
Start (DC)
t
U,I
Seq.time
En d ( DC)
Example 1
Focussing 1 cycle of 1 sequence point:
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axiso󰀨set(DC
value at start and end).
The number of sine waves per cycle depend on the sequence point
time and the frequency. If the time was 1 s and the frequency 1 Hz,
there would be exactly 1 sine wave. If the time was 0.5 s at the same
frequency, there would only be a half sine wave.
Start (DC)
t
U,I
Seq.time
En d ( DC)
Example 2
Focussing 1 cycle of 1 sequence point:
The DC values at start and end are the same but the AC (amplitude)
not. The end value is higher than the start so that the amplitude
increases with each new half sine wave continuously through the
sequence. This, of course, only if the sequence time and frequency
allow for multiple waves to be created. e. g. for f=1 Hz and Seq. time
= 3 s, three complete waves would be generated (for angle = 0°) and
reciprocally the same for f=3 s and Seq. time=1 s.
Start (DC)
t
U,I
Start (AC) En d ( AC )
Seq.time
En d (DC)
Start (DC)
t
U,I
Start (AC) En d ( AC )
Seq.time
En d (DC)
Example 3
Focussing 1 cycle of 1 sequence point:
The DC values at start and end are unequal, as are also the AC val-
ues. In both cases the end value is higher than the start so that the
o󰀨setincreasesfromstarttoend(DC)andtheamplitudealsowith
each new half sine wave.
Additionallytherstsinewavestartswithanegativehalfwavebe-
cause the angle is set at 180°. The start angle can be shifted at will
in 1° steps between 0° and 359°.
Start (DC)
t
U,I
f (st art)
f (end)
Seq.time
En d ( DC)
Example 4
Focussing 1 cycle of 1 sequence point:
Similar to example 1 but with another end frequency. Here this is
shown as higher than the start frequency. This impacts the period
of the sine waves such that each new wave will be shorter over the
total span of the sequence time.