RoboDog - Not Armed on Powerup -Why?

[alan]

Does anyone know why the RoboDog
isn't 'armed' and ready to go when powered
up? If the AC goes out and comes back on,
this unit is not ready. Does anyone know
how to modify the unit to be ready when
powered up?

[Walt2]

I have yet to find any difference in function, whether the RoboDog is armed or not.  It will always bark if motion is detected.

What is suppose to be the functional difference when armed or disarmed?