Howard,

Is it just this loco or any loco? What address are you using? With
SPROG, addresses 1 - 127 default to short addresses. Addresses > 127
are extended addresses. Are you using an address in the range 100 - 127
and expecting it to be extended? Can you read the decoder OK?

Andrew


--- In sprog-dcc@..., "Howard Watkins" <howard@...> wrote:
>
> I have an early Sprog (version 3.8) working OK with DecoderPro 1.7.6
> (on Windows XP) to read & set CVs. However I cannot get it to control
> a loco.
>
> I open a throttle, set it to the loco address & turn on the power. The
> light on the throttle changes to green, and an RRamp meter shows 11.3
> Volts on the track. I set the speed to max, the Sprog window replies
> with 127 but the loco does not move.
>
> Any ideas anyone?
>
> Howard.
>