Thanks for helping me understand the the voltage parameters. I figured it was multiplied to the amount of cells the pl8 expects to be in series, but wasn't sure.1st
Over the years , I have gotten used to working the way it works .. but .. Soo , kind of like the language I speak , it starts to seem easier for me , but French is easier than English for someone else, but French would be very hard for me .. but .. I will still agree ... the PL8 CCS definfately is not perfect and definately has room for improvement.
I'm sorry if I gave the wrong impression .. no miracles or anything like that .. perhaps instead of 'psychic' .. another way to describe it would be .. the difficulty is mainly , once you know what it is you want it to do .. top voltage , bottom voltage , amp rate , charge time out , discharge time out , CV or not , balance or not , etc .. etc .. once you know how you want it .. you then have to translate that through the filter of the constraints of the built in safeties , and into PL8eese language for it to understand you.
Even without either of the two post #10 , files I posted .. the 3.35 firmware file for the PL8 or the LTO preset .. even without either of those .. if your Duo won't accept them.
For your discharge 12s battery to a set voltage without the balance leads effort.
You can do that under the unbalanced 24v Lead Acid OEM preset .. with it selected as being unbalanced , you don't need the balance nodes/leads .. then set the discharge voltage for the whole 12s pack .. keep in mind .. a 24v PbA battery is a 12s PbA battery .. a 24v NiMH battery is a 20s or 21s NiMH battery .. etc.
There is more than one path.
Just one such example:
24v PbA is a 12s battery .. could be unbalance charged from 2.0v per cell x 12s = 24v pack .. up to as high as 2.75v per cell x 12s = 33v pack .. I don't know about your Duo .. but my PL8 lets me choose those cell level voltages in 5mV cell steps .. 5mV x 12s = 60mV pack steps .. Soo , I can set that to charge to any pack voltage between 24v and 33v in 60mV steps .. Could be unbalance discharged as low as 1.0v per cell x 12s = 12v pack .. or discharged as high as 2.0v per cell x 12s = 24v pack .. and maybe yours is different .. but mine lets me do discharges in 1mV cell steps x 12s = 12mV pack steps .. Soo , I can set that unbalanced 12s (24V) Pba pack to discharge to any voltage between 12v and 24v in 12mV pack level steps .. PbA doesn't usually use balancing , so unbalanced without the node wires is allowed .. just be careful not to over discharge or over charge , as there is no cell level monitoring set up like that.
Be mindful sense that would be liying to the PL8 about what chemistry and such it is connected to .. you have to be sure you set it correctly .. you won't be able to rely on it's safeties when you lie to it about what is happening .. so be careful not to over charge any cell , or over discharge any cell , as without cell level monitoring it can't do that check for you .. and each PL8 can only cell level monitor up to 8 cells at a time , it just can't monitor 12cell voltage at the same time in one PL8 unit ... you could do two 6s .. that would still get you to 12s , and it would allow for cell level monitoring .. but two 6s would take both A and B of your duo .. and you would have to get the balanced cell level tweaked.
That will be entirely different for when you go to do cell level testing .. but .. for the non-balanced discharge it is an option.
Just to try to help clarify .. as Jim wrote .. the PL8 OEM has not yet released OEM update to allow for LTO chemistry on all their products to all their users .. When I talked to them .. They said they just don't yet see enough demand for that specific chemistry to warrant that kind of investment .. and to be fair .. they are correct , compared to other types (LiFePO4 , LiPo , etc) there are still far fewer people using LTO .. that is why there are fewer BMSs , fewer chargers , fewer anything .. the market for LTO stuff is getting better slowly .. but it is just not 'penetrated' as much as other types of chemistry have .. soo as Jim wrote if you call them up .. the average tech you get on the phone will be polite , professional , etc .. but they might not not be able to help you very much if you start asking them about LTO specific questions .. the reality is that it is still just not a common chemistry type.
I and several others here in InsightCentral here planning on doing alot of testing of LTO cells .. Although I was able to tweak some of the other presets to get it to work .. and even after many many years experience using the PL8 it still took me a while .. so to make that effort easier .. that's why that firmware and preset were developed .. the newer way (with both firmware and perset) was better (for me anyway) .. and I think it made it better of the others as well (Jim, etc) .. if those pieces of software aren't compatible with your duo , that means you are kind of stuck back with the harder pa th we were working with 1st .. which sucks for a newbie to be doing it the 'hard way'.
Regarding the presets, how did you built your preset without basing it on one of the established presets loaded into the software? Or if it were based on a software preset, how did you bypass the "safety" features? Is there a developer software that is needed like eq1 alluded to? I just don't see where to build a preset from the ground up on this particular CCS.