User manual

Page 62
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 B HP Series
Schematic diagram: Application and result:
Offset
t
A
Amplitude
t1t2
A triangular wave signal for input current (direct) or input
voltage (indirect) is generated. The positive and negative
slope times are variable and can be set independently.
The offset 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 (isos-
celes triangle) or 99.9 ms:0.1 ms (right-angled triangle
or sawtooth).
3.10.7 Rectangular function
Thefollowingparameterscanbeconguredforarectangularwavefunction:
Value Range Description
I(A), U(A) 0...(Nominal value - (Offs)) of U, I A = Amplitude of the signal to be generated
I(Offs), U(Offs) 0...(Nominal value - (A)) of U, I Offs = Offset, based on the foot of the rectangular wave
t1 0.01 ms...36000 s Time (pulse width) of the upper level (amplitude)
t2 0.01 ms...36000 s Time (pause width) of the lower level (offset)
When adjusting very short time values for t1 and t2 not every adjustable amplitude can be
gained on the DC input. Rule of thumb: the smaller the time value, the lower the true amplitude.
Schematic diagram: Application and result:
Offset
t
A
Amplitude
t1 t2
A rectangular or square wave signal for input current
(direct) or input voltage (indirect) is generated. The
intervals t1 and t2 dene how long the value of the
amplitude (pulse) and how long the value of the offset
(pause) are effective.
The offset 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
is 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