User manual

Page 52
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
EL 3000 B Series
FollowingparameterscanbeconguredfortrackingmodeMPP2:
Value Range Description
U
OC
0...Nominal value of U Voltage of the solar panel when unloaded, taken from the panel specs
I
SC
0...Nominal value of I Short-circuitcurrent,max.speciedcurrentofthesolarpanel
Δt 5 ms...65535 ms IntervalformeasuringUandIduringtheprocessofndingtheMPP
ΔP 0 W...0.5 P
Nom
Tracking/regulation tolerance below the MPP
3.9.10.3 Mode MPP3
Alsocalled“fasttrack”,thismodeisverysimilartomodeMPP2,butwithouttheinitialstepwhichisusedtond
theactualMPP,becausemodeMPP3woulddirectlyjumptothepowerpointdenedbyuserinput(U
MPP
, P
MPP
).
In case the MPP values of the equipment under test are known, this can save a lot of time in repetitive tests. The
rest of the function run is the same as with MPP2 mode. During and after the function, the least acquired MPP
values of voltage (U
MPP
), current (I
MPP
) and power (P
MPP
) are shown in the display.
FollowingparameterscanbeconguredfortrackingmodeMPP3:
Value Range Description
U
OC
0...Nominal value of U Voltage of the solar panel when unloaded, taken from the panel specs
I
SC
0...Nominal value of I Short-circuitcurrent,max.speciedcurrentofthesolarpanel
U
MPP
0...Nominal value of U Voltage in the MPP
P
MPP
0...Nominal value of P Power in the MPP
Δt 5 ms...65535 ms IntervalformeasuringUandIduringtheprocessofndingtheMPP
ΔP 0 W...0.5 P
Nom
Tracking/regulation tolerance below the MPP
3.9.10.4 Mode MPP4
Thismodeisdifferent,becauseitdoesnottrackautomatically.Itratheroffersthechoicetodeneausercurveby
setting up to 100 points of voltage values, then track this curve, measure current and power and return the results
in up to 100 sets of acquired data.
Startandendpointcanbeadjustedarbitrarily,Δtdenesthetimebetweentwopointsandthefunctionruncanbe
repeated up to 65535 times. Once the function stops at the end or by manual interrupt, the DC input is switched
off and the measured data is made available.
Conguration,controlandanalysisarealldoneusinganyoftheoptionallyavailable,digitalinterfaces(USB,Eth-
ernet). This mode is supported by ModBus RTU and SCPI protocol, as well as by the software EA Power Control,
which is included with the interface option on USB stick.
3.9.11 Remote control of the function generator
The function generator can be remotely controlled via any of the optionally available, digital interfaces (USB, Eth-
ernet),butcongurationandcontrolofthefunctionswithindividualcommandsisdifferentfrommanualoperation.
The external documentation “Programming Guide ModBus RTU & SCPI” on USB stick, which is included with the
interface option, explains the approach. In general the following items apply:
• The function generator is not controllable via the analog interface