Hi all,
Can anyone explain why below assistant does not work…
This is what i would like to achieve:
Turn the aux relay on when:
vbatt > 54VDC 30s OR load > 4200W for 30s
Turn the aux relay off when:
load <3500W for 30s AND vbatt < 53.5VDC for 30s
I’m missing something obvious but what??
Please help….Thanks!!
Try programming the conditions for OFF one by one… if there are several conditions, problems may arise in the program sequence…
Hi,
But i want both off conditions to be true before the aux relay must turn off…
any idea on how to do that?
as far as i understand, conditions within one assistant are AND’ed and multiple assistants are OR’ed, but i might be wrong…
I agree with you, of course… 
If both conditions have to be true, then of course in one condition box…
But what are you switching with the relay… “Sounds” like the control of a heating element.
Are NC, NO, and COM connected correctly?
If the heating element is included in the load calculation, it could be that it does not switch off because it does not fall below 3.5 kW, since the heating element is switched on.
The relay is just a signaling relay to switch off a device in my house, almost no (external) current passes through it.
I tested only the ‘on’ condition so far, by making sure vbatt >54V, or switching on a large load, but no state change of the aux relay. So i know for sure that something in my assistants is not right…
i monitor the aux relay with the VE.bus monitor in VE-configure, it’s state never changes (remains 0).
Have you activated the “battery monitor” of the Multi in VE Configure? …
I think that you may have > (greater than) and < (less than) confused.
One normally turns off a discretionary load when battery voltage is low and load is high
i use this screen, it works…
On the bottom right is the aux relay state.
I have not enabled the battery monitor, hence i only switch on raw input VDC, whcih is correctly measured according the VE.bus monitor (SOC is not used anywhere in my system). But should i enable it to make the assistants work?
It could be that the battery monitor is used for this Function … It can’t hurt to try… 
I’ll try on my next attempt…
Since i’m a hw/sw developer, i would sure like to talk to the person who programmed this assistant module and get direct support 
… maybe someone from Victron can look at my assistant issue…
The assistants for the Aux relay generally work well. I have three relays from my three MP2s, the relay from the RS 450/200, and the Cerbo in operation. My first question would be: do you have the correct relay? That’s a bit confusing, actually.
Relay D, aux relay, i was under the assumption that this was the ‘Programmable Relay’ in the assistants….
That’s absolutely correct. Unfortunately, the Aux input can sometimes be a bit tricky. Next question: Are COM, NO, and NC correctly assigned? That’s also a bit confusing. COM is on the far right, if I remember correctly. That also deviates slightly from the standard.
One more thing… please excuse me, it’s been a few days since I dealt with relays. But I believe it’s an OR connection if it’s mentioned in a wizard. Please double-check or test it yourself… but I’m quite certain. I had a similar problem understanding it back then.
I havent connected anything to the aux relay anymore, i’m just measuring and checking the aux relay status on the VE.bus monitor in VE Configure. And the aux relay status in VE Configure does not change … so it seemed pointless to me to check the system further until the aux relay status changed based on my assistants. So far i havent been able to change the status of the aux relay.. As we ‘speak’ vbatt >54 for about an hour… but aux relay has not changed state…
I can’t say anything about the displays on the monitor. I connected a small lamp to the contacts back then and experimented a bit.
Currently a can’t reload new assistants because the system is in production.
I hope a Victron employee chimes in and looks at my assistants and tell me what i did wrong…
I don’t want to dash your hopes. This is a forum, not a support platform.
Yes i know, but one can hope 
There is little documentation about the assistants apart from one web page that is rather unclear: this page
Nothing on the use case of the programmable relay used as a relay….
I’m familiar with the problem. That’s precisely why I wrote about how I experimented with the lamp back then. However, that didn’t stop me from using the relays extensively. I use them to control my heat pump and wallboxes. What started as a bit of fun now controls the main load in my house. I’ll expand it a bit more in a few months.
