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EPS Stromversorgung GmbH
Alter Postweg 101 • 86159 Augsburg
Germany
PSI 9000 3U Series
Fon: +49 821 / 570451-0
Fax: +49 821 / 570451-25
3.9.10.1 Loading and saving the arbitrary function
The 100 sequences 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 flash
drive via the front side USB port. Generally, all 100 sequences are saved or loaded using a text file of type CSV
(semicolon separator), 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 100 rows with 8 subsequent values (8 columns, separated by semicolons) and
must not have gaps
•
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)
•
Values with decimal places must use the comma as decimal separator
•
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
0...50% U or I
B
AC End
0...50% U or I
C
Frequency Start 0...1000 Hz
D
Frequency End 0...1000 Hz
E
Start angle AC
0...359°
F
DC Start
0...(Nominal value of U or I) - AC Start
G
DC End
0...(Nominal value of U or I) - AC End
H
Time in μs
100...36.000.000.000 (36 billion μs)
For details about the parameter and the arbitrary function refer to
Example CSV:
The example shows that only the first two sequences are configured, while all others are set to default values. The
table could be loaded as WAVE_U or WAVE_I when using, for example, the model PSI 9080-170 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
as selectable at all.
► How to load a sequence table (100 sequences) from a USB flash drive:
1.
Do not plug the USB drive yet or remove it.
2.
Access the function selection menu of the function generator with
MENU -> Function Generator -> Arbitrary -> U/I, to see the main screen
of sequence selector, as depicted to the right.
3.
Tap touch area
, then
and follow the instructions
on screen. If at least one valid files has been recognized (for file and
path naming see above), the device will show a list of files to select
from with
.
4.
Tap touch area
in the bottom right corner. The selected file is then checked and loaded, if valid.
In case it is not valid, the device will show an error message. Then the file must be corrected and the
steps repeated.
