DLT with Logic Help

I have conceded and decided to purchase a Cooler Master to control a VRF system.

However I want to be able to control the fan speed of the aircon in each zone by a DLT. For example:

Press Button - Fan Speed Low
Press Button Again - Fan Speed Medium
Press Button Again - Fan Speed High
Press Button Again - (WE ARE BACK TO LOW AGAIN).

Not only do I want to be able to send the command I want the screen to be able to display the speed that is set (I am not using any feedback from the coolermaster to generate the feedback text).

I was wondering how you would do this in Logic. I have read the guide on C-Bus labels but still am confused.

I WILL POST WHAT I HAVE BUT MY LOGIC IS NOT WORKING. AND AM HOPING SOMEONE CAN HELP ME DEBUG

I know that doing this is possible as the premisis inwhich I am implementing this used to have Switch Automation which provided the same functionality.

 

This is code of mine from an install.. Yous hsould be able to adapt to suit..

global variables:
CounterFan : integer;


Initialisation:
CounterFan := 0;


Module 'fan control'
Once (GetLightingState("BBQ Fans")=OFF) THEN
BEGIN
CounterFan:=0;
Setlightinglevel("BBQ Fans",0%,"0s");
end;

If (GetLightingLevel("BBQ Fans")= 255) THEN
BEGIN
CounterFan:= CounterFan+1;
CASE CounterFan of
1:begin
Setlightinglevel("BBQ Fans",60%,"0s");
SetstringIBSystemIO("Label Group Text","Network 254","Lighting","BBQ Fans",0,'Fan - Low');
end;
2:begin
Setlightinglevel("BBQ Fans",75%,"0s");
SetstringIBSystemIO("Label Group Text","Network 254","Lighting","BBQ Fans",0,'Fan - Med');
end;
3:begin
Setlightinglevel("BBQ Fans",99%,"0s");
SetstringIBSystemIO("Label Group Text","Network 254","Lighting","BBQ Fans",0,'Fan - High');
end;
4:begin
Setlightinglevel("BBQ Fans",0%,"0s");
SetstringIBSystemIO("Label Group Text","Network 254","Lighting","BBQ Fans",0,'Fan - Off');
end;
5:Counterfan:=0;
End;
end;

If CounterFan>=4 then
begin
CounterFan:=0;
Setlightingstate("BBQ Fans",OFF);
END;

Cheers..