Heinzinger electronic GmbH
Phone: +49 (0) 8031 2458 0
www.heinzinger.com
Anton-Jakob-Str. 4, 83026 Rosenheim
Fax: + 49 (0) 8031 2458 58
Germany
Page 86
ERS COMPACT
3.11.8
Trapezoidal function
Restrictions which apply particularly to this function:
•
There is no preselection to which of both, source mode and sink mode, the function is applied; the settings decide
whether it’s “source mode only”, “sink mode only” or a mixture of both
•
When applying the function to the voltage, the device can only switch to and work in sink mode if the external
voltage on the DC terminal is higher than the highest point ( amplitude) of the wave and the current
setting “I Sink” is not 0
The following parameters can be configured for a trapezoidal function:
Parameter
Range
Description
Amplitude (A) 0...(rated value - |Offs|) of U or I
Amplitude of the signal to be generated
Offset (O)
0... (U
Nom
- A)
Offset, based on the foot of the trapezium
- (I
Nom
- A)...+(I
Nom
- A)
Time t1
0.1 ms...36,000,000 ms
Time for the positive slope of the trapezoidal wave signal.
Time t2
0.1 ms...36,000,000 ms
Time for the top value of the trapezoidal wave signal.
Time t3
0.1 ms...36,000,000 ms
Time for the negative slope of the trapezoidal wave signal.
Time t4
0.1 ms...36,000,000 ms
Time for the base value (=offset) of the trapezoidal wave signal
Schematic diagram:
Application and result:
O
ff
set
t
U,I
A
m
p
lit
u
d
e
t1
t2
t3
t4
O
ff
set
t
U,I
A
m
p
lit
u
d
e
t1
t2
t3
t4
Same as with other functions the generated signal can be applied
to the set value of voltage (U mode) or to the current (I mode).
The slopes of the trapezium can be varied by adjusting the times
for rise and fall separately.
The periodic duration and repetition frequency are the result of the
four adjustable time values. With suitable settings the trapezium
can be deformed to two triangular or two rectangular pulses. It
has, therefore, universal use.
3.11.9
DIN 40839 function
This function is based on the curve defined in DIN 40839 / EN ISO 7637 (test impulse 4), and is only applicable
to voltage. It shall replicate the progress of automobile battery voltage during engine starting. The curve is divided
into 5 parts (see diagram below) which each have the same parameters. The standard values from the DIN are
set already as default values for the five sequences.
Typically, this function is used with power supplies (here: source mode), but can also be used with electronic loads
(here: sink mode). However, the device can only switch to and work in sink mode if the external voltage on the
DC terminal is higher than the highest point ( amplitude) of the wave and the external source can’t deliver
more current than adjusted for sink mode (I sink). Else the device could regulate the voltage values resulting from
the curve. The global current set values are used to explicitly define in what operation mode the function shall run.
The following parameters can be configured for the single sequence points or the entire function:
Parameter
Range
Seq Description
Start
0...U
Nom
1-5
Start voltage of the ramp in part 1-5 (sequence point)
Uend
0...U
Nom
1-5
End voltage of the ramp in part 1-5 (sequence point)
Time
0.1 ms...36,000,000 ms
1-5
Time of the ramp
Cycles
0 / 1...999
-
Number of times to run the entire curve (0 = infinite)
Time t1
0.1 ms...36,000,000 ms
-
Time after cycle before repetition (cycle <> 1)
U(Start/End) 0...U
Nom
-
Voltage setting before and after the function run
I/P (PS)
0...I
Nom
/P
Nom
-
Set values of current and power for source mode. If either I=0 or
P=0, the device would only work in sink mode
I/P (EL)
0...I
Nom
/P
Nom
-
Set values of current and power for sink mode. If either I=0 or P=0,
the device would only work in source mode