User manual

Page 52
EL 9000 T Series
www.elektroautomatik.de
[e-mail]
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
► How to start and stop a function
1. The function can be started either by tapping or pushing the “On/Off” button, if the DC input is
currently switched off. The function then starts immediately. In case START is used while the DC input is
still switched off, the DC input will be switched on automatically.
2. The function can be stopped either by tapping or pushing the “On/Off” button. However, there
is a difference:
a) The are only stops the function, the DC input remains ON with the static value in effect.
b) The “On/Off“ button stops the function and switches the DC input off.
Any device alarm (overvoltage, overtemperature etc.), protection (OPP, OCP) or event with
action = Alarm stops the function progress automatically, switches off the DC input and reports
the alarm in the display.
3.10.5 Sine wave function
Thefollowingparameterscanbeconguredforasine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 zero point of the mathematical sine curve against
0, may not be smaller than the amplitude.
Freq. 1...10000 Hz Static frequency of the signal to be generated
Schematic diagram: Application and result:
Offset
Amplitude
t
A
f
Amplitude
A normal sine wave signal is generated and applied to
the selected set value, e.g. current (I). At a constant
input voltage the current input of the load will follow a
sine wave.
For calculating the maximum power input the amplitude
and offset values for the current must be added.
Example: with an input voltage of 15 V and sin(I) se-
lected, set the amplitude to 8 A and the offset to 12 A.
The resulting maximum input power is then achieved at
thehighestpointofthesinewaveandis(12A+8A)*
15 V = 300 W.
3.10.6 Triangular function
Thefollowingparameterscanbeconguredforatriangular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 triangular wave against 0
t1 0.01 ms...36000 s Time for the positive slope of the triangular wave signal.
t2 0.01 ms...36000 s Time for the negative slope of the triangular wave signal
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.