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EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
PSB 9000 3U Series
Schematic diagram:
Applications and results:
t
A
Point 1
Point 2
Pt. 3
Point 4
Example 9
Focussing 1 cycle of 4 sequence points from 99:
Point 1: 1/4th sine wave (angle = 270°)
Point 2: Three sine waves (ratio of frequency to
sequence time: 1:3)
Point 3: Horizontal ramp (f = 0)
Point 4: Falling ramp (f = 0)
3.11.10.1 Loading and saving the arbitrary function
The 99 sequence points of the arbitrary function, which can be manually configured with the control panel of the
device and which are applicable either to voltage (U) or current (I), can be saved to or loaded from a common USB
stick via the front side USB port. Generally, all 99 points are saved or loaded at once using a text file of type CSV
which represents a table of values.
In order to load a sequence table for the arbitrary generator, following requirements have to be met:
•
The table must contain exactly 99 rows with 8 subsequent values (8 columns) and must not have gaps
•
The column separator (semicolon, comma) must be as selected by MENU parameter “USB file separator format”;
it also defines the decimal separator (dot, comma)
•
The files must be stored inside a folder called HMI_FILES which has to be in the root of the USB drive
•
The file name must always start with WAVE_U or WAVE_I (not case-sensitive)
•
All values in every row and column have to be within the specified range (see below)
•
The columns in the table have to be in a defined order which must not be changed
Following value ranges are given for use in the table, related to the manual configuration of the arbitrary generator
(column headers like in Excel):
Column Parameter
Range
A
AC start amplitude
0...50% U or I
B
AC end amplitude
0...50% U or I
C
Start frequency
0...10000 Hz
D
End frequency
0...10000 Hz
E
AC start angle
0...359°
F
DC start offset
0...(Nominal value of U or I) - AC start amplitude
G
DC end offset
0...(Nominal value of U or I) - AC end amplitude
H
Sequence point time in μs
100...36.000.000.000 (36 billion μs)
For details about the parameter and the arbitrary function refer to
„3.11.10. Arbitrary function“.
Example CSV:
The example shows that only the first two sequence points are configured, while all others are set to default val
-
ues. The table could be loaded as WAVE_U or WAVE_I when using, for example, the model PSB 9080-120 3U,
because the values would fit both, voltage and current. The file naming, however, is unique. A filter prevents you
from loading a WAVE_I file after you have selected “Arbitrary --> U” in the function generator menu. The file would
not be listed at all.
