Blind control

Fortunately you have a PAC, as this is the simplest way to get one button control as you describe if you don't have a shutter relay. If you had a shutter relay this functionality is built in

I suggest you code up a simple state machine in logic, and use Trigger Control messages from your key unit to switch between the states.. You would have 4 states. MovingUp, MovingDown, IdleUp, IdleDown. The purpose for two idle states is to know which direction you're going in next.

The key unit sets the Trigger Group "BlindTrigger" to Action Selector "Active". To do this you make the key a scene key and and create a blank scene with Trigger Group "BlindTrigger" and Action Selector "Active". You also need to create another Action Selector "Waiting" with level zero... the code sets the Trigger Group back to this level once it's "seen" the Active level.

The state machine would be something like (this is pseudocode)

Code:

if (BlindTrigger = Active) then
  begin
   BlindTrigger = Waiting; {reset trigger}
   if (BlindState = IdleUp) then
    begin
     Activate Up Relay;
     BlindState = MovingUp;
    end
   else if (BlindState = MovingUp) then
    begin
     Activate Stop;
     BlindState = IdleDown;
    end
   else if (BlindState = IdleDown) then
    begin
     Activate Down Relay;
     BlindState = MovingDown;
    end
   else {BlindState must be MovingDown}
    begin
     Activate Stop;
     BlindState = IdleUp;
    end
end;

Don't forget to initialise your state variable. You may also want to add some kind of timeout. The states "MovingUp", "MovingDown", "IdleUp", and "IdleDown" are constants.. so you also need to define these in your constants section. You could just as easily use integer values in the code, but using constants makes it a lot easier to follow.

HTH.. let us know how you go.

Nick

 

I agree.. if you're at the stage where you haven't purchased any bits yet, the Shutter Relay is by far the simplest and cheapest option.

However, since he said that he already has the Somfy controller and has already set up the relays to drive it, and had the PAC available.. this is how I would suggest it's done.

Nick

 

Shutter relay sales are running at about 3 x forecast quantities. This has created a big problem! More shipments are on their way.