Is anyone running a Schneider SW4024 and the XWSCP Control Panel?

[sparkie]

I just bought a new SW4024 and control panel.  The control panel load display (in Watts) is a moving target. Running a single 500w lamp (off-grid batt) the panel display load is fluctuating  between 400-580 watts, every time the display refreshes its a different reading. I also notice the current reading is low showing 16A at 25.1V, some movement in the current also, but not enough to produce the crazy power readings.  AC readings are rock stable 119.1V @ 4.2A.  Does anyone have this configuration and experience this type of behavior?

Thanks!

[mike90045]

I feel your pain, but I have no solution.

[DMJ72]

I have that configuration and that is what happens here too. I am not sure how the system computes the AC loads, but that has been my experience.

I will try and post a video , but in the meantime take a look at a clip I made when I just got the inverter .. The iron was the only load plugged into it :

http://youtu.be/cyAvsF0Sx6M?list=UU6Ek-i77nG4gsxFn5WZOZag


Is this what you notice?

[sparkie]

Yes, it looks just like the video, even without a load applied it's all over the place.  Also seems to effect scan mode on lighter loads.

[tecnodave]

Sparkie & Mike90045

I will try to explain this.  It has to do with the digital sampling rate of the A-D (analog to digital converter) . Very  much smoother readings will be the result of a higher sampling rate but this takes computer power, clock cycles to do this but the processor has many things to do, it controls all aspects of the inverter and can spend only so much time reading the inputs and outputs.

If you think about the AC sine wave you realize that at two points in the cycle the current will be zero.....only for a few milliseconds......and at two points the current will be at a maximum......if you read only on the peak readings or at the same exact time in the waveform  the output will be more stable......but this is getting into timing issues with the microprocessor , it's got more important things to do

In the design of the Classic multiple microprocessors were used to off load computations to other processors. This results in the main processor having more time to do its task and offloads readings to a DSP (digital signal processor) and communications to another processor (MNGP). This leaves more time for each processor to do its task.

Did you ever wonder why Windows is so clunky......the processor spends only a few nanoseconds looking at what you are doing, most of the time it is housecleaning, refreshing memories.....every location every 200 microseconds or less, reading disk drive, reading mouse, etc.   The more whistles and bells the less time for the system to do the job that it really is designed for

It's a real trade-off......really good performance requires a RTOS (real time operating system) vs GUI (graphical user interface)

Really good serious computer design does not have bunches of whistles and bells like windows but has a minimum of user input and output but spends most of its time in the job at hand......

Thus we have the Classic which does not have a web server.......it concentrates on getting power from the sun.  Data logging is not its main job.

Let's  get some data unit to provide user data,  beagle bone or something of that sorts that takes all that load from the main processor

td