🚀 go-pugleaf

On Sun, 19 Apr 2009 16:55:37 -0700, tuppy wrote:

> Many people (like myself) are installing 1kw grid tie inverter systems
> to take advantage of rebate system.

Who did you use?

>I am happy with it except the solar
> installer doesnt have technical knowledge about interfacing to the rs232
> port on the inverter for data logging etc.  The inverter is a generic
> rebadged brand so cant contact manufacturer. cms-2000
> http://www.aussiesolar.com.au/inverter_CMS-2000.pdf
>
> I am wondering if anyone has played with the serial port of their grid
> tie. What baud rate? Can you use hyperterminal that comes with xp. What
> command do you send to it?

nope, but there are two general problems;  wiring, then settings.

If you have never connected anything else to your serial port, you are on
a steep learning curve.

What wiring depends on what the ports on each end are. It depends if is
DTE or DCE on the solar boxen, whether you need a straight through or
crossover(null modem) cable.

Basically, there are null modem cables and null modem cables.

Then is depends on protocol, 9600, 8,N,1,P was common.

Practical steps, get a null modem cale and join them together. Load
hyperterminal, config for direct and above and tape the keys.

Try Xon/xoff forst over hardwire(?)

If you get garbage, especially a good strong string(menu?), then wiring
is generally okay and it is just a matter of protocol settings.

This sort of stuff is why I keep a couple of serial terminals around.
Save fighting terminal programs(hyper,mnicom,etc) to sort out basics.

tuppy wrote:

> Many people (like myself) are installing 1kw grid tie inverter systems
> to take advantage of rebate system.

You mean stealing other peoples' tax money. You should be ashamed of
yourself. Solar thermal is vastly better.

PV is a JOKE.

Graham

On Mon, 20 Apr 2009 18:04:14 +0100, Eeyore wrote:

> tuppy wrote:
>
>> Many people (like myself) are installing 1kw grid tie inverter systems
>> to take advantage of rebate system.
>
> You mean stealing other peoples' tax money.

With that attitude, I hope you have not accepted any government super co-
contributions.

On 20 Apr 2009 01:19:24 GMT, terryc <newssevenspam-spam@woa.com.au>
put finger to keyboard and composed:

>What wiring depends on what the ports on each end are. It depends if is
>DTE or DCE on the solar boxen, whether you need a straight through or
>crossover(null modem) cable.

You can tell which pins are outputs by looking for +/-12V. Inputs will
probably be floating.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

On Tue, 21 Apr 2009 07:47:11 +1000, Franc Zabkar <fzabkar@iinternode.on.net>
wrote:

>On 20 Apr 2009 01:19:24 GMT, terryc <newssevenspam-spam@woa.com.au>
>put finger to keyboard and composed:
>
>>What wiring depends on what the ports on each end are. It depends if is
>>DTE or DCE on the solar boxen, whether you need a straight through or
>>crossover(null modem) cable.
>
>You can tell which pins are outputs by looking for +/-12V. Inputs will
>probably be floating.

Sometimes they appear to have very weak pullups (pull-downs?) but sticking a 1K
resistor to ground will sort out which pins are outputs and which aren't.