Node-Red : switch off Multiplus 10minutes after Grid Lost

Node-RED
, , , ,
1

Initial program (works fine)
Initial program (works fine)1624×603 175 KB

Program 2 (works in debug only)
Program 2 (works in debug only)1619×585 176 KB

Trying to find a program in order to switch off the multiplus 10 minutes after a Grid Failure :

  1. I managed to do it with my attached “initial program” : the Multiplus switches OFF 10 minutes after a Grid Lost alarm appears → GREAT !

BUT I need to take into account the following scenario : in case the Grid Lost alarm dissapears before the Timer ends (AC In recovery within less than 10 minutes), I do not want the Multiplus to switch OFF at the end of the Timer !

  1. So I imagined the attached program n°2 :
  • When Grid Lost Alarm is not active, I send an “ON” command to the Multiplus every 5 seconds.
  • When Grid Lost Alarm is active, I send a delayed “OFF” command to the Multiplus (only one, node configured as “only changes”)
    → In case of a Grid failure lasting less than 10 minutes, only one “switch off” command will be sent to the Multiplus, and “switch on” commands will be sent every 5 seconds (so that the Multi does not switch off for more than 5 seconds).

Explanation of the problem :

  • When I test the program only with the debug function (disactivating the Switch Position) output : everything works fine.
    I can see the Grid Lost Alarm appear on the Node-Red, on the Dashboard, and I can hear the BIP of the Cerbo that means that an alarm is ON.

  • BUT when I test the program completely (activating the Switch position output on the Node-Red program), the system does not detect the Grid Lost Alarm anymore !
    I can see on the Dashboard that the grid is lost, the Multiplus is inverting, but no alarm detected (and no BIP coming out of the Cerbo).

I guess the fact that the Multiplus receives “switch on” commands every 5 seconds prevents it from being able to send the Grid Lost Alarm (but I am note sure about that).

Can someone help me solve this problem ?
Is there a more elegant way to program this function ?

Thanks !!

2

Hello,

instead of followig the Alarm, why don’t you follow the AC itself.

image
image1203×224 16.6 KB

And replacing the Timer by a trigger that you rearm unless the AC is present ?

image
image495×689 14.1 KB

image
image1373×337 27.5 KB

I can get the switch command on my setup/installation as the Multi control panel is also installed…

Xavier

3

I also use System/Ac/In/NumberOfPhases to detect grid presence. It’s null / 0 when grid is down, else 1,2,3, depending on.

Eventually using the physical test does cut of your internet connection, therefore vrm / node red data access? (Dunno if node red is local or cloud based)

4

@dognose
Node red is hosted on the gx itself usually, it is on venus os large. (It is accessible via local and vrm for programming.)

6

Thank you Xabi, using the Trigger helped me solve my problem !
I still use the Grid Lost Alarm but the Reset function of the trigger allows me to configure the input to “Only Changes”.
Great !!