User Manual

Page 67
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
Schematic diagram: Application and result:
t
U
U start
1 2 3 4 5 t1
Sequence points
If the function is set up to run in source mode, the built-
in load function acts as a sink and ensures the quick
output voltage drop as required for some parts of the
curve, allowing the output voltage progress to follow
the DIN curve.
The curve conforms to test impulse 4 of the DIN. With
suitable settings, other test impulses can be simulated.
If the curve part in sequence point 4 should contain a
sine wave instead, then these 5 sequences would have
to be set up for the arbitrary generator.
The global start (and end) voltage is adjustable as
parameter “U(Start/end)” in the menu page “U/I/P Lim-
its”. It does no modify the voltage settings in the single
sequence points, but it should match the start voltage
setting (U start) of sequence point 1.
3.11.10 Arbitrary function
Thearbitrary(freelydenable)functiono󰀨erstheuserfurtherscope.Thereare99sequencepointsavailableforuse
oneithercurrent(I)orvoltage(U),allofwhichhavethesamesetofparametersbutcanbedi󰀨erentlycongured,
so that a complex function process can be built up. An arbitrary number out of the 99 sequence points can run in
a sequence point block, and this block can then be repeated up to 999 times or endlessly. The function only acts
on either current or voltage, thus a mix of assignment to current (I) or voltage (U) isn’t possible.
The arbitrary curve can overlay a linear progression (DC) with a sine curve (AC) whose amplitude and frequency
is shaped between start and end. When both, start frequency and end frequency, are 0 Hz the AC overlay has no
impactandonlytheDCpartise󰀨ective.EachsequencepointisallocatedasequencepointtimeinwhichtheAC/
DC curve from start to end will be generated.
Thefollowingparameterscanbeconguredforeachsequencepointinthearbitraryfunction:
Value Range Description
Is(AC) -50%...+50% I
Nom
Start amplitude of the sine wave part (I mode)
Ie(AC) -50%...+50% I
Nom
End amplitude of the sine wave part (I mode)
Us(AC) 0...50% U
Nom
Start amplitude of the sine wave part (U mode)
Ue(AC) 0...50% U
Nom
End amplitude of the sine wave part (U mode)
fs(1/T) 0 Hz...10000 Hz Start frequency of the sine wave part
fe(1/T) 0 Hz...10000 Hz End frequency of the sine wave part
Angle 0°...359° Start angle of the sine wave part
Is(DC) ±(Is(AC)...(I
Nom
- Is(AC))) Startvalue(=o󰀨set)oftheDCpartofthecurve(Imode)
Ie(DC) ±(Ie(AC)...(I
Nom
- Ie(AC))) Endvalue(=o󰀨set)oftheDCpartofthecurve(Imode)
Us(DC) Us(AC)...(U
Nom
- Us(AC)) Startvalue(=o󰀨set)oftheDCpartofthecurve(Umode)
Ue(DC) Ue(AC)...(U
Nom
- Ue(AC)) Endvalue(=o󰀨set)oftheDCpartofthecurve(Umode)
Seq.time 0.1 ms...36000 s Time setting of the selected sequence point
The sequence point time (seq. time) and the start and end frequency are related. The minimum
value for Δf/s is 9.3. Thus, for example, a setting of fs = 1 Hz, fe = 11 Hz and Seq.time = 5 s
would not be accepted as Δf/s is only 2. A seq. time of 1 s would be accepted, or, if the time
remains at 5 s, then fe = 51 Hz must be set.
The amplitude change between start and end is related to the sequence time. A minimal change
over an extended time isn’t possible and in such a case the device will report an inapplicable
setting.