Hi,
I am using Aux1 as "Diversion" to switch a relay which disconnects my inverter from the grid when battery voltage reaches 54V for more than 15 mins. It re-connects when battery drops below 50V.
So far, so good.
I want to use Aux2 to warn me (via a relay, to a buzzer & light inside the house) if the battery voltage drops below 48.2V (50% SOC).
I have tried "Diversion Low" & "Diversion High" but even when the voltage + width is reached, and the LED is lit or off, the LED will still cycle on and off (at varying speeds).
I've attached pictures (I think) of both.
I have tried various setpoints and widths with the same results
I am using:
Classic 200V (rev 4)
Firmware:
- Classic Rev: 1172
- Network Rev: 1122
Any ideas?
Thanks,
dRdoS7
(http://classic%20aux2%20diversion%20high_small.jpg)
(http://classic%20aux2%20diversion%20low_small.jpg)
Since Aux 2 diversion with that width of 1 volt operates using PWM, when the battery voltage is
near the set point voltage, kinda like it is in the picture, the Aux 2 output will be going on and
off a few hundred times a second. The Local App reads the Classic at certain time intervals
and will sometimes catch the Aux 2 when it is on and sometimes when it is off. In other
words, the LED is not 100% accurate when Aux 2 is PWMing on and off and on and off...
Another thing to do to check this out is to set the Classic's LED mode to MODE 1 in the
MISC menu then look at the right side LED inside the vent slots of the Classic itself
which will show the Aux 2 state (on or off) much closer. If the LED is on, but dim, this means
that Aux 2 is PWMing away and can verify that it is in between full on and full off.
You can additionally check for this by temporarily reducing that set point voltage
another volt or two below actual battery voltage. That should make Aux 2 stay on more
fully and then you can see if the LED on the Local App appears to stay on.
Depending on the software revision in the Classic, the Aux 2 Diversion PWM mode
may be operating in a much slower DC PWM mode rather than the faster AC PWM
mode. If working in DC PWM mode, the frequency will be even slower so the LED
on and off in the Local App may even be more noticeable. Just to make sure,
temporarily change the Aux 2 mode to "Clipper" mode and look in its SETUP menu.
This is where the choice between AC and DC is made. If it is set to DC, change it
to AC, then change the Aux 2 mode back to Diversion High again and press ENTER
to save the changes.
An older version of software would allow this AC/DC mode apply to the other modes
as well.
boB
boB
Hi,
Thanks for the reply.
I switched to "AC" now it's working correctly. Why? It's not mentioned as a requirement for correct Aux2 Diversion operation in the manual. As the pictures show the opposite occurred to what was expected.
I noticed during this that the Local App didn't reflect the current setting of Aux2 on the MNGP, where I had altered the settings. When I changed from Div Low to Div High on Local App the Clipper was set back to DC.
Thanks,
dRdoS7.
Not sure why it would have changed when going from low to high diversion but glad you got it going.
The Local App is still lacking a few things and AC/DC is one of them.
boB
Hi,
Why does "Diversion" work in reverse (and correctly) when in "AC"?
(http://classic%20aux2%20diversion%20high-ac_small.jpg)
(http://classic%20aux2%20diversion%20low-ac_small.jpg)
dRdoS7.
Quote from: dRdoS7 on January 19, 2013, 10:59:58 PM
Hi,
Why does "Diversion" work in reverse (and correctly) when in "AC"?
(http://classic%20aux2%20diversion%20high-ac_small.jpg)
(http://classic%20aux2%20diversion%20low-ac_small.jpg)
dRdoS7.
I forgot to mention this before, but in DC mode, the voltage operating width from full on to
full off is MUCH wider than in DC mode. This is a consequence of the frequency being much lower
for the PWM pulses in DC as opposed to AC mode.
boB