Limit Volume of C-Bus Amplifier

Dear ALL,

I wish your urgent help in this subject.

I first time work with C-Bus amplifier and I'm so glad that the volume of 25W loud enough for room music.

And it even much louder than the customer needs... I received a request to limit volume control for the amplifier ( only control from 1% to 50% for example).

May you give me advise on this!

Thank you very much in advance!

 

I tried some ways to find solution

Dear All,

Here what I tried for finding solution to limit volume control for Amplifier:

1. Hardware setting:

I tried to find something similar with Min/Max setting for DIMMER in AMPLIFIER. But AMPLIFIER firmware doesn't support this kind of function.​

2. Touchscreen programing:

It's easy to solve this issue with touchscreen using Slider control and setting the Slider to control from 1% to 50%. But Customer want to control it by DLT switch, not the touchscreen.​

3. DLT programing with Logic from Touchscreen OPTION 1:

I set 1 DLT button with function Dimmer, group adress is: DLT VOLUME
I set volume control for AMPLIFIER by group adress: AMPLIFIER VOLUME
I write logic in Touchsreen as follow:

+ Varible:
VolumeTemp1: integer;
VolumeTemp2: integer;
VolumeTemp3: integer;
VolumeTemp4: integer;

+Module 1: Enable condition for Module 2 (when DLT button is pressed).
This condition to prevent to many instructions in one scan process

VolumeTemp1 := Getlightlevel (DLT VOLUME);
if VolumeTemp1 = VolumeTemp2 then DisableModule (2)
Else EnableModule (2);
VolumeTemp2 := Getlightlevel (DLT VOLUME);

+ Module 2: Limit the volume for Amplifier

VolumeTemp3 := Getlightlevel(DLT VOLUME);
VolumeTemp4 := Round(VolumeTemp3 / 2) + 1;
Setlightlevel(AMPLIFIER VOLUME, VolumeTemp4, 0s);
Delay (0.2);

{ the delay to prevent signal sent in every loop}

+ OUTCOME:
When simulation it sometimes show eror "signal sent in every loop" when I pressing DLT VOLUME buttons in touchscreen for long time.

Download in physical units, DLT can change the volume from 1% to 50% but it take about 40 second minute to take effect. So long for an intelligent system.

+ QUESTION:
Please advise me to modify the logic to run faster.

4. DLT programing with Logic from Touchscreen OPTION 2:

I set DLT button and AMPLIFIER volume control the same group address: VOLUME

I write logic in touchscreen as follow:

if Getlightlevel(VOLUME) > 70% then setlightlevel(VOLUME) =70%;

OUTCOME:
DLT cursor can not change direction when VOLUME get to 70%. So can not decrease the volume. This can solve by using 2 button with Up and Down function. But I got 4 amplifier in this area and 4 sence to control here.


Moreover I want to receive your advise for the Logic, because I new to use the logic and I always face with the delay when using Logic. So I want to learn from your experience in LOGIC.

Your help is higly appreciated!

Best regards,

 

Thanks for your share!

Thanks for your share!

It seem that I usually use the strange way to solve prolem!