Testing functionality of EXTIO circuits

[acidclown33]

Hi Dacian, 

Is there a way to test the operation of each EXTIO circuit to ensure it will be triggered when it's needed? 

I'm bench testing my system and I would like to force a HVD instance for EXTIO 4 and a LVD instance for EXTIO 3 to ensure that it'll do what it's supposed to when the time comes, without actually running the battery up and down on the bench.

Thanks, 

Iain

[Dacian Todea (electrodacus)]

Iain,

Yes you can just set the respective EXT IOx that you want to test to type 0 push OK to confirm and all devices controlled by that EXT IOx should turn OFF then set it back to whatever type it was.

If that works and all is turned OFF then all that needs to be correct is that you selected the correct battery in advanced settings and ideally just use the default values and did not manually changed things in advanced settings.

[acidclown33]

Thank you. I thought that was the case. For some reason it doesn't seem to be tripping my sterling b2b when I set it to 0. I have extio4+ connected to +ve through a 1kohm resistor, and extio4- connected to bms2 of the b2b. No idea why it isn't working. The same for my victron battery protect on extio3. 

I bought the sbms0 second hand "unused" but don't know the history of it.

Is there maybe a way of testing the EXTIO ports with a multimeter to check they're working properly? Or is there another way of wiring it up to trigger the devices?

[Dacian Todea (electrodacus)]

First test to se those devices work (turn OFF) by just removing the EXT IO4- and EXT IO3- from them and see if they turn OFF.

It is fairly unlikely that EXT IOx has a problem. EXT IOx is nothing more than a solid state switch open circuit when OFF (type 0) and close circuit when ON

Meaning there will be no voltage at EXT IO3- or EXT IO4- when on type 0 and so it is likely that your devices are not configured correctly and I suspect they will not turn OFF when you remove the EXT IO3- / EXT IO4- from them.