6RL SERIES OPERATION MANUAL
SECTION 6: FRONT PANEL OPERATION
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2018 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
6RL Series Regenerative DC Load Operation Manual
Page 104 of 204
voltage values even if the user calculated them as current values and incorrectly loaded
them as an UI table. The UI function is suitable for simulating fuel cell characteristics.
In the IU function, the assignment of the values is the other way round, the behavior,
however, the same. Thus, the behavior of the load or the current and power consumption
can be controlled with dependence on output voltage and step changes can be created.
The IU function is suitable for the simulating solar panels in photovoltaics related tests.
Note: Uploading of a table from an USB memory stick requires the use of text files in CSV
format (*.csv). Integrity is checked on loading (values not too high, number of values
correct) and possible errors reported in which case the table will not be loaded.
Note: The 4096 values in the table are only checked for value and valid number of data
points. If all the values were to be graphically plotted, a curve would be created
which could include significant step changes in current or voltage. That could lead to
complications for connected loads if, for example, the internal current
measurement in the load swings slightly so that the voltage jumps backwards and
forwards between two values in the table, which, in the worst case scenario, could
be 0V and the maximum voltage.
6.9.12.1
Loading UI and IU tables from USB drive:
The so-called UI or IU value tables can be loaded from a file via a standard USB memory stick
formatted as a FAT32 file system. In order to load the file, it has to meet following
specifications:
The file name always begins with IU or UI (not case-sensitive), depending on which
of the two function you load the table for
The file must be a text file of type Excel CSV and must only contain one column with
exactly 4096 values without gaps
Values with decimal places must use a decimal separator as depending on the
selection with parameter “USB file separator format” (“US”: separator = comma,
decimal separator = dot)
No value may exceed the nominal value of the unit. For example, if you have an 80 V
model and you are going to load a table with values for voltage, none of the 4096
values may be higher than 80 V (the adjustment limits from the unit’s front panel do
not apply here)
The file(s) has/have to be put inside a folder named HMI_FILES in the root directory
of the.
If these specifications are not met, the unit will not accept the file and display an error
message on the display. Files with names beginning different to UI or IU are not recognized
for this purpose. The USB drive may contain multiple UI/IU files with different names and list
them for the selection of one.
How to load an UI or IU table from an USB drive:
1.
Do not plug the USB drive yet or pull it out if already plugged.
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