6RL SERIES OPERATION MANUAL
SECTION 7: REMOTE PROGRAMMING
Entire Contents Copyright
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 161 of 204
When adjusting parameters for the arbitrary function generator manually on the unit’s front
panel, they are limited to each so the resulting signal will work as expected. But in remote
control, there will be no feasibility check and so it is up to the user to write correct values.
For example, index 0 is connected to index 5, as the DC value is the base line of the AC
amplitude. It means, if you, for instance, want to achieve a sine wave with 5 A amplitude on
the DC input current of an electronic load, the base line of the resulting sine wave has to be
at minimum 5 A, else the negative wave will be clipped at 0. Indexes 5 and 6 are adjustable
DC offsets, which move the AC wave’s base line on the Y axis. So the values in indexes 5 and
6 should at least be as high as index 0 or 1 (whichever is bigger), but they can also be higher.
See figures below.
In relation to the adjustments for a function as they can be done on the unit’s front panel,
following indexes are selectable and readable/writable with sub command :DATA.
Index
Parameter
Value range
Note
0
Start value(AC part) in A or V
0...Nominal value of U or I
For AC part only
1
End value (AC part) in A or V
0...Nominal value of U or I
For AC part only
2
Start frequency in Hz (integer)
0...1000
For AC part only
3
End frequency in Hz (integer)
0...1000
For AC part only
4
Start angle in ° (integer)
0...359
For AC part only
5
Start level (offset) in A or V
0...Nominal value of U or I
For AC and DC part
6
End level (offset) in A or V
0...Nominal value of U or I
For AC and DC part
7
Sequence time in seconds
0.0001...36000
Note: In case start and end value (indexes 0+1 and indexes 5+6) are not equal, the unit
expects a certain minimum change of ±0.058%/s resp. of ±9.3 Hz/s for the start and
end frequency (indexes 2+3) over the sequence time. It is therefore not possible to
let the input current rise by 1 A over 1 h (ramp), because this exceeds the internal
set value resolution by far. Another example: with the sequence time being set to 2
s, a start frequency of 1 Hz and end frequency of 10 Hz would not be accepted,
because difference only 9 Hz/s, but start frequency of 30 Hz and end frequency of 5
Hz would.
7.12.15.3
Load table data (XY generator)
The XY generator is based on a table with 4096 values for 0...125% of the referenced
physical value. It is expected to write the full table.
It is important to decide whether the table is going to be used for a UI or for a IU function,
because the unit will interpret those 4096 values either as voltage or current values. For
example, the table might contain values up to 170A for a 6RL03-170-80-2 with 80 V/170 A,
which would be acceptable for a IU function, but not for UI function, because then the table
would be interpreted as voltage values where 80 V is maximum and will lead to incorrect
results.
Command
Description
[SOURce:]FUNCtion:GENerator:XY:LEVel˽{0...4095}
1. Select one out of 4096 table entries for writing or
returns the currently selected entry number.
Summary of Contents for 6RL Series
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