hdg encoder assign offset lua

Hi

I'm building fcu using mobiflight and arduino. I can not attribute offset type 0x66C0 to the following function:

function AB_HDG_plus ()
    AB_hdgtrk = ipc.readLvar("L:AB_AP_HDGTRK")
    AB_drift = round(ipc.readLvar("L:AB_AP_HDGTRK"))
    if AB_hdgtrk == 0 then
        LVarSet = "AB_AP_HDG_Select"
    else
        LVarSet = "Autopilot_TRK_set"
    end
    LVarGet = ipc.readLvar(LVarSet)
    AddVar = LVarGet + 1
    if AddVar > 359 then
        AddVar = 0
    end
    DspHDG(AddVar)
    ipc.writeLvar(LVarSet, AddVar)
end

function AB_HDG_minus ()
    AB_hdgtrk = ipc.readLvar("L:AB_AP_HDGTRK")
    if AB_hdgtrk == 0 then
        LVarSet = "AB_AP_HDG_Select"
    else
        LVarSet = "Autopilot_TRK_set"
    end
    LVarGet = round(ipc.readLvar(LVarSet))
    AddVar = LVarGet - 1
    if LVarGet < 0 then
        AddVar = 359
    end
    DspHDG(AddVar)
    ipc.writeLvar(LVarSet, AddVar)
end

I'm using an encoder assign to increase or decrease the Hdg value on aerosoft airbus.

thanks in advance for the help

Edited September 28, 20178 yr by mauri61173