- poking rs232 of BMS - 3 Updates
- Variac capacity - 1 Update
| three_jeeps <jjhudak@gmail.com>: Nov 05 10:36AM -0800 On Tuesday, November 5, 2019 at 8:14:42 AM UTC-5, legg wrote: > Mostly used in SE Asia or the Indian subcontinent. English > version is only recently available. > RL What initially comes to mind is to connect a terminal or terminal emulator and try some of the more run of the mill key sequences: return (return n times), ctl-c, ctl-d, esc, F1..Fn, etc. What comes back may not be visible on a terminal unless the terminal can display non-printing ASCII characters. A serial line logic analyzer in parallel may help. If you are having this much trouble working with this thing, I'd suspect the quality of the unit as a whole. My gut reaction to your description is to toss it and get one made by a reputable company or roll your own. The time you spend trying to decipher the mysteries of this one could be better spent doing your own. A simple DAS board with a serial port connected to a PC and program in Basic or Python will do it. Or, if you really want bare bones/low cost and something fast, get a arduino or if you want to go a small/cheap but functional computer, get raspberry PI 3B+ j |
| legg <legg@nospam.magma.ca>: Nov 05 07:04PM -0500 On Tue, 5 Nov 2019 10:36:58 -0800 (PST), three_jeeps >If you are having this much trouble working with this thing, I'd suspect the quality of the unit as a whole. My gut reaction to your description is to toss it and get one made by a reputable company or roll your own. The time you spend trying to decipher the mysteries of this one could be better spent doing your own. A simple DAS board with a serial port connected to a PC and program in Basic or Python will do it. >Or, if you really want bare bones/low cost and something fast, get a arduino or if you want to go a small/cheap but functional computer, get raspberry PI 3B+ >j I've got a monitor hooked up, another port dedicated to coms (if it can be established). The monitor can poke, but not react, so sending ACKs in a timely manner would be a problem. Would expect a data and op-mode register to be pumped out, to be translated. I'm guessing that the BMS is in low power mode, kicking the RS232 occasionally. There will be a connection / com sequence that I haven't discovered yet and that previous hardware install configuration did not anticipate or provide, in order to get the thing running. The BMS manual wants to control a battery charger disconnect relay. The inverter/charger wants no disconnection (their exact wording includes the term 'NEVER'), just a 'stop charging' closed-contact signal. The missing sensor power bothers me, though. The guts are well designed and would be familiar to most developers on this side of the pond, though we wouldn't be allowed to accumulate the same BOM cost. There's really nothing missing there - no short cuts. Should be easily modified if balance insufficient for the cell capacity being employed - the same hardware - populated more extensively, is designed to handle a 10-cell string. This is a 4-cell app. Their app people are rumouring a SW revision that hasn't been forwarded here or download link-referenced, as yet. RL |
| legg <legg@nospam.magma.ca>: Nov 06 10:30AM -0500 On Tue, 5 Nov 2019 10:36:58 -0800 (PST), three_jeeps >> undocumented features for I/O via remote terminal. Has >> CAN port, which seems to be used only for control power and >> crude 'run' (input) /'stop charging' (output) LF/DC signals. <snip >What comes back may not be visible on a terminal unless the terminal can >display non-printing ASCII characters. A serial line logic analyzer in >parallel may help. <snip Monitoring program is MicroRidge Comtest Serial. Can issue single characters, or a string. Return - you mean CR /x0d ? Cntrl - ? how to? RL |
| Phil Allison <pallison49@gmail.com>: Nov 05 12:31PM -0800 Some complete MORON called tabby wrote: >-------------------------------------------------------- > > ** Irrelevant to the RMS current draw. > It's not, and I didn't claim it was, but hey. ** Three deliberate lies in one short sentence. Might be a bullshit record. ..... Phil |
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