How to control a 3 speed fan with a single C-Bus button?

HI there, i was wondering if anyone has had success before in controlling a 3 speed ceiling fan with a single C-Bus Button. I would like to have the fan connected to 3 channels of a relay unit. The way i need it to work is like this:

1st press turns the fan onto slow using relay channel 1 (Button light is on)
2nd press turns the fan onto medium using relay channel 2 (Button light is on)
3rd press turns the fan onto fast using relay channel 3 (Button light is on)
4th press turns the fan off (Button light is off)

Also when the fan is in the "on" state i need the c-bus switch to stay active, eg i cannot use the bell press option because the light of the switch turns off after each press.

Can anyone help me with this. I have tried a few different Logic codes with limited success.

 

As he states in his post, relay channels 1, 2 & 3

Do a search, this has been covered before.

If I remember correctly, solutions included the PAC.

Mick

 

Yep,
Best results are gained from logic programming in a PAC (or C-touch).

What hasn't generally been mentioned in previous discussions is maintaining the LED indicator along with the 3 speeds.

General idea is three groups:
1 - Fan Low
2 - Fan Med
3 - Fan High

Use a bell-press to trigger logic somewhat like:
if low, med and high are all off, turn low on
if fan low is on, turn fan low off, turn med on
if med is on, turn med off, turn high on
if high is on, turn high off

For the indicator light, add another group for FanLED, and link that group to the LED in block setup.
Then if low, med and high are all off, turn low and LED on.
If high is on, turn high and LED off.

 

Getting there but still a few questions

Howdy everyone,

Thanks for you useful input it greatly appreciated but here's where i'm at:

It works but i am currently having 2 issues!

1. Froop you mentioned about adding the group for FanLED, and linking that group to the LED in block setup. Could you explain that a little better because i can't seem to get that part to work.

2. The button pressing seems a little clunky and sometimes you have to press it two or three times to get it to change state. Is there a reason for this and how can it be resolved? I noticed at the bottom of the logic page it mentions that the code is being executed repeatedly, is that the problem?

This is the logic i have programmed:

The button i am using to change the fan speed is called "fan control"

The logic looks like this:

Global Variables
CounterFan : integer;

Initialisation
CounterFan1 :=0;

once (GetLightingState("fan control") = ON then
begin

CounterFan1 := CounterFan1 + 1;
SetLightingState(fan control", ON);
case CounterFan1of ​

0 : ;
1 : SetScene("Scene Fan 1 Low");
2 : SetScene("Scene Fan 1 Med");
3 : SetScene("Scene Fan 1 Hi");
4 : SetScene("Scene Fan 1 Off");
5 : CounterFan := 0;
end​

end;

Now obviously i have created four scenes for each different state, here is an example of 1:

Scene Fan 1 Low

fan 1 Level 100%
fan 2 Level 0%
fan 3 Level 0%
fan control Level 100%
Key 1 LED Level 100%

Thankyou everyone for your help in getting this issue resolved.

 

DLT Dynamic Labelling

Hi all,

thanks for your helpful information, it has been fantastic.

One last question i have is using this 3 speed fan control with a DLT switch.

Because you have no LED control with a DLT i thought it would be nice to be able to get the labels to change as to what speed setting the fan was currently on.

Here is my logic attempt but i don't seem to be able to get it to work, can anyone help me out with this, cheers

My C-Bus switch is labelled "Bed 1 sweep fan control"

Constants:
net = 254;
app = 56;

Global Variables:
CounterFanBed1 : integer;

Initialisation:
CounterFanBed1 := 0;
SetIntIBSystemIO("Label Language",2);

once (GetLightingState("Bed 1 sweep fan control") = OFF) then
begin
CounterFanBed1 := CounterFanBed1 + 1;
SetLightingState("Bed 1 sweep fan control", ON);
case CounterFanBed1 of
0 : ;
1 : SetScene("Bedroom 1 Sweep Fan Low");
2 : SetScene("Bedroom 1 Sweep Fan Med");
3 : SetScene("Bedroom 1 Sweep Fan High");
4 : SetScene("Bedroom 1 Sweep Fan Off");
end
end;

if CounterFanBed1 >= 4 then
begin
CounterFanBed1 := 0;
end;

once CounterFanBed1 = 1 then
begin
SetStringIBSystemIO("Label Group Text", net, app, 157, 0, 'Fan Low');
end;

once CounterFanBed1 = 2 then
begin
SetStringIBSystemIO("Label Group Text", net, app, 157, 0, 'Fan Med');
end;

once CounterFanBed1 = 3 then
begin
SetStringIBSystemIO("Label Group Text", net, app, 157, 0, 'Fan High');
end;

once CounterFanBed1 = 4 then
begin
SetStringIBSystemIO("Label Group Text", net, app, 157, 0, 'Fan Off');
end;

 

Hi,

There is an alternative, you can use a dimmer if you get an appropriate capacitive device in between the fan and the dimmer.

This flattens the ac signal so that fan will maintain a variable speed without the horrible emf buzzing you normally get if you just connect it straight in.

I forget the name of the device, any sparkies out there know what I'm referring to?

I've seen it used in several jobs with no problems

Michael

P.S. Obviously this means you don't use the 3 speed controller that comes with the fan