User Manual

Page 65
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:
Offset
t
U,I
Amplitude
t1t2
A triangular wave signal for use on the current or voltage is
generated. The positive and negative slope times can be set
independently.
Theo󰀨setshiftsthesignalontheYaxis.
The sum of the intervals t1 and t2 gives the cycle time and its
reciprocal is the frequency.
Example: a frequency of 10 Hz is required and would lead to
periodic duration of 100 ms. This 100 ms can be freely allocated
to t1 and t2, e. g. 50 ms:50 ms (isosceles triangle) or 99.9 ms:0.1
ms (right-angled triangle or sawtooth).
3.11.7 Rectangular function
Restrictions which apply particularly to this function:
• There is no preselection to which of both, source mode and sink mode, the function is applied to; the settings
decide whether it’s “source mode only”, “sink mode only” or a mixture of both
• When applying the function to the voltage, the device can only switch to and work in sink mode if the external
voltageon theDCterminalishigherthan thehighestpoint(o󰀨set+amplitude)ofthewaveandthe current
setting “I Sink” isn’t 0
Thefollowingparameterscanbeconguredforarectangularfunction:
Value Range Description
U(A), I(A) 0...(ratedvalue-[O󰀨s]) A = Amplitude of the signal to be generated
U(O󰀨s) 0... (U
Nom
- A)
O󰀨s=O󰀨set,basedonthefootoftherectangularwave
I(O󰀨s) - (I
Nom
- A)...+(I
Nom
- A)
t1 0.1 ms...36000 s Time (pulse width) of the upper level (amplitude)
t2 0.1 ms...36000 s Time(pausewidth)ofthelowerlevel(o󰀨set)
Schematic diagram: Application and result:
Offset
t
U,I
Amplitude
t1 t2
Offset
t
U,I
Amplitude
t1 t2
A rectangular or square wave signal for use on the current
orvoltageisgenerated.Theintervalst1andt2denehow
long the value of the amplitude (pulse) and how long the
valueoftheo󰀨set(pause)aree󰀨ective.
Theo󰀨setshiftsthesignalontheYaxis.
Intervalst1andt2canbeusedtodeneadutycycle.The
sum of t1 and t2 gives the period and its reciprocal the
frequency.
Example: a rectangular wave signal of 25 Hz and a duty
cycle of 80% are required. The sum of t1 and t2, the period,
is 1/25 Hz = 40 ms. For a duty cycle of 80% the pulse time
(t1) is 40 ms*0.8 = 32 ms and the pause time (t2) is 8 ms