Flashing ABS light

[The Landshark]

In the process of running down the fault codes on my 06 xc70 to clear the anti skid warning i noticed the abs light flashing on the dash, no fault codes were stored relating to the abs system.
it doesn't come on while driving, only when parked with the engine on for a few minutes, is this normal or do i have a problem somewhere.
Thanks,
Jim

[Antherzoll]

Unsure it's relevant, but any time my OBDII device or VIDA/DiCE is communicating with the vehicle the ABS light will flash.

[The Landshark]

That's ok so, i had vida running while it was happening, i wont worry about it unless it comes on when i'm driving