Setting a Min/Max to a C-Bus Group

Hi is There away to set a group address to have a maximum value of 160 (63%) in the logic,
I am trying to integrate a axium multi zone amp in to my c-bus system and it requires hex values for the volume (00 to A0 ) 0 to 160 bass and treble (F4 - 0C) -12 to 12

I have got most of it figured out using IntToHexString but using a regular group address gives me a value from (00 to FF)

Is there a way to do this at all as i would like to control the volume bass treble etc from DLT's as well as the wiser.

The code i have so far
{constants}

{Commands}
LF = #$0A;
MuteCommand = #$30#$32;
SourceCommand = #$30#$33;
VolumeCommand = #$30#$34;
BassCommand = #$30#$35;
TrebleCommand = #$30#$36;

{Zones}
Z1Amp = #$30#$31;
Z1Pre = #$34#$31;
Z2Amp = #$30#$32;
Z2Pre = #$34#$32;
Z3Amp = #$30#$33;
Z3Pre = #$34#$33;
Z4Amp = #$30#$34;
Z4Pre = #$34#$34;


{Data}

{Source's}
CD = #$30#$30;
Tape = #$30#$31;
Tuner = #$30#$32;
Aux = #$30#$33;
Utility = #$30#$34;
Sat = #$30#$35;
DVD = #$30#$36;
Video = #$30#$37;
{Mute}
Mute = #$30#$30;
UnMute = #$30#$31;
ToggleMute = #$30#$32;

{Zone 1 Controls}
Z1AmpOn = #$30#$31#$30#$31#$30#$31#$0A;
Z1AmpOff = #$30#$31#$30#$31#$30#$30#$0A;
Z1AmpVolume = #$30#$34#$30#$31;
Z1AmpBass = #$30#$35#$30#$31;
Z1AmpTreble = #$30#$36#$30#$31;
Z1PreOn = #$30#$31#$34#$31#$30#$31#$0A;
Z1PreOff = #$30#$31#$34#$31#$30#$30#$0A;
Z1PreVolume = #$30#$34#$34#$31;
Z1PreBass = #$30#$35#$34#$31;
Z1PreTreble = #$30#$36#$34#$31;

{Variables}

{VariablesVolume}
Zone1VolumeHex : String;
OutString : String;
RequiredVolumeZone1 : Integer;
CurrentVolumeZone1: integer;

{Module Code}

RequiredVolumeZone1 := GetLightingLevel("Zone1AmpVolume"); {get the level}
OutString := Z1AmpVolume; {set the first part of the command string}
IntToHexString(RequiredVolumeZone1,0,Zone1VolumeHex); {set the variable part of the command & convert cbus level to hex value }
Append(OutString,Zone1VolumeHex); {add the strings together}
Append(OutString,LF); {add a line feed }


if ( RequiredVolumeZone1 <> CurrentVolumeZone1) then
begin
WriteSerial(1,OutString);
CurrentVolumeZone1 := RequiredVolumeZone1;
end;

 

Just scale the value.

Vol := ga * 160 div 255;

 

Got it Working...

Thanks for the fast reply