[Nut-upsdev] UPS driver for Online USV-Systeme Zinto A

[Arjen de Korte]

Citeren "Christian \"Eddie\" Dost" <ecd op brainaid.de>:

> The basic differences in protocol are:
>
> There is no "I" command, but a "FW?" command to request firmware  
> version. "Q1" and "F" are there.

Is the reply format the same? If so, this is trivial to add in the  
blazer.c global 'command' structure, by appending a line

     	{ "zinto", "Q1\r", "F\r", "FW?\r" },

If not, this will have to be done via a configuration option in 'ups.conf'.

> The main reason I wanted support for the Zinto UPS was to be able to  
> configure it. There are several settings to configure:
>
> - ups.start.auto: Auto-Start after back online, boolean "AR0",  
> "AR1", request current setting with "AR?", response will be "AR0" or  
> "AR1".

OK.

> - ups.test.auto: Enable or disable automatic selftest, command  
> "ATx", same as "ARx" above.

This is (too) similar to the 'ups.test.interval' we already have. I  
propose to map these values to either '0' (no automatic testing) and  
the number of seconds between tests (automatic testing enbled).

> - battery.energysave: Turn off load when on battery and load is very  
> small, command "GRx", same as "ARx" above.

OK.

> - battery.discharge.longtime: Configure UPS to longtime discharge  
> (small load for long duration), command "SDx", same as "ARx" above.  
> "SD1" means standard, "SD0" means long time discharge.

It's unclear to me what this actually does. Is it used to allow deep  
discharging the battery (what nut calls battery.protection on/off) or  
does it change the threshold when the UPS decides the battery is low  
(this would need to be lower in case of high rate discharge). I  
sincerely hope it is the first, otherwise the engineers at Zinto did a  
lousy job. You need to measure the load when running on battery  
anyway, so adjusting this automatically is trivial.

> - input.sensitivity: Configure trigger points for low/high input  
> voltages. Command "IPx", where "x" is "N", "W", "G", or "?" for
> normal, wide, generator input and "?" to request current setting.

OK.

> - output.voltage.nominal: Configure output voltage when running on  
> battery. Command "Vxxx" where "xxx" is 220, 230, 240 or 110, 120, 127.
> This setting is echoed back in the "F" command.

Is this auto ranging (ie, a low mains unit would allow 110, 120 and  
127 and a high mains unit 220, 230 and 240)?

> If we can design a probing scheme to detect the "FW?" command maybe  
> and add these settings to the blazer driver, I'd agree to integrate  
> the code.

Like it or not, but the chances that a separate driver with the above  
properties would make it into mainstream NUT is close to zero. The  
added value of these settings by no means justifies the added  
maintenance burden that would be required by adding another one.

Auto detection of models in this class of UPS devices is limited. We  
already know of several units that lock up if you send them  
unsupported commands, so probing with a command and see what's  
returned is not likely to be included. It would be less risky to add a  
configuration option to select a model instead.

Best regards, Arjen
-- 
Please keep list traffic on the list (off-list replies will be rejected)