Hey,
I wanted to turn on AC 2 output when the SOC is more then 85% and when it falls to 65% it turns off the AC2. It should also turn on AC2 when the generator starts so when the AC1 input is activated even if the SOC in the presence of AC1 is lower then 65%. I have set up 3 assistants. First is programmable relay that activates AC2 on when the SOC is higher then 85%. The second programmable relay activates AC2 when AC1 input is activated for 15 seconds. And the third programmable relay turns off the AC2 when the SOC falls lower then 65%.
I am now worried what will happen in case the SOC is lower then 65% and the generator will run and the AC1 input will be activated. Will the relay be off until the SOC reaches 65% while the generator will still be running or will the relay “go mad” and will turn on and off constantly because it will get two commands with two contradictive conditions like the assistant which has condition to turn off the AC2 relay when SOC is lower then 65% will try to turn it off and the other assistant which has condition to turn on the AC2 when the AC1 input is activated for 15s will try to turn it on? How could I achive my wanted scenario using assistants?
Thanks and Best regards
Uroš Žvokelj
Just give it a try?!
(disconnect the loads from AC Out 2)
What you describe sounds ok.
You might have to switch the order of the assistants.
Yeah I will do so, but I don’t believe that disconnecting the loads will do any good if the relay will get two commands from two assistants that both have conditions met to trigger the relay at the same time. In this case the relay should constantly turn on and off and it could potentially damage the relay? And the only way to stop this from happening is to connect to the unit with mk3 and disable the assistants which will be difficult to do as the site is in a remote mountain area and the owner doesn’t posses the knowledge to do that…
one other way would be to turn off the inverter but then he cannot charge the batteries. He could turn the bypass switch to power the loads directly from generator and turn the inverter off…well I guess when we try to do that I’ll have to be there to monitor what will happen. When I was setting up the assistants I noticed that I can set several conditions under one assistant, but I wasn’t sure if the logic by this conditions are understand by system as AND or OR. I assumed that they are under AND. So if I were to set one assistant with two conditions to turn off the relay AC2 if SOC is under 65% and the AC1 input is deactivated for 10s would be probably better as in case where the AC1 input would be activated and the SOC would be under 65% then the conditions for turning the relay off wouldn’t be met and it couldn’ collide with the assistant that turns on the AC2 relay when the AC1 input is activated…am I thinking correctly?
You definitely never should do such programming remotely if you not sure how/if it works.
So you should be there to test it or you test it on a system you have locally and only transfer the assistants into the remote system if you know that it works.
It doesn’t run the assistants one by one and switch the relay.
It goes through all assistants and than does the switching on OR off, that’s why the order of the assistants matters.
And what do you think the system will do in this case with these three assistants? So if the hierarchy is important, I assume the assistant thats before the next one which is contradictive has advantage and will overrulled the next one which would turn off the relay until the condition of this relay is no longer fullfiled and then the next assistant which condition is met will trigger the action am I correct? and if I am, then there should be no overlapping and no relay malfunctions…
It’s been awhile since I used multiple relay assistants so I can’t say for sure which is the correct order.
You have to try it.
The relay will switch or not, but it won’t go crazy (at least I never had that).
Just found out this which answers my dilemma
Combining multiple Assistants
Multiple Assistants can be used in one unit. For example the Programmable Relay is often used multiple times. When doing so; this is how they are evaluated:
- an ON condition always has priority over an OFF condition - multi criteria in the ON ( or OFF ) list go by the OR principle