On Sun, 17 Mar 2019 19:03:07 -0400
Gene Heskett <ghesk...@shentel.net> wrote:

> On Sunday 17 March 2019 17:56:02 Nicklas Karlsson wrote:
> 
> > > ...
> > > So once every 1/2 second a message starting with 0x40A shows up on
> > > the bus and everyone sees it.  The Charger and in this case also a
> > > small display are the only ones interested in it.   The charger uses
> > > the information to set charge on/off, voltage and current.  The
> > > display grabs the information and shows what the current charge
> > > voltage and max current are set to.
> > >
> > > The charger also reports in a different message what it measures for
> > > battery voltage and what the current charge current is and it
> > > reports if it's enabled.  That's all identified by the Object
> > > Dictionary entries at 18xx and 1Axx.
> >
> > I am familiar with CANopen communication and also to some degree
> > battery charging. The old style open Lead-acid batteries should bubble
> > like home brewn mash before they are done.
> >
> Fraid not Nik. And this is TL;DR, but read it anyway. LA batteries might 
> bubble gently when being heavily charged, but every bubble is 
> electrolite lost forever and its hard on the plates.

You have to refill.

> Someone in the distant past at kxne-tv had put a 10 amp charger on a pair 
> of 220 AH truck batteries with a 47 ohm 5 watt resistor in series, so 
> they were getting about 600 ma as a trickle charge into the two of them 
> in parallel. So they were boiling at a good rate. ...

You have to stop then they bubble like home brewn mash, at least after a while. 
They should not bubble during trickle charge.

> ... Since it was 
> started weekly for a 15 minute dry run, it never needed that charger in 
> the first place.


> > CiA 309-3 is to access a CANopen device over TCP/IP and as I added it
> > could be used to access dictionary of devices connected to Linuxcnc.

Nobody have anything to mention about CiA 309-3?


Nicklas Karlsson


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