User manual

Page 53
EA Elektro-Automatik GmbH
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Germany
Fon: +49 2162 / 3785-0
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www.elektroautomatik.de
[e-mail]
EL 9000 T Series
Schematic diagram: Application and result:
Offset
t
A
Amplitude
t1t2
A triangular wave signal for input current or input voltage
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
Ampl. 0...(Nominal value - Offset) of U, I Amplitude of the signal to be generated
Offset Ampl...(Nominal value - Ampl.) of U, I Offset of the foot of the rectangular wave against 0
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 value 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 or
input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 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