How to correct the E and beeping sound after I turn on my Royal 480nt ?

I think you click cancel

Beauty kaisara
April 2015

Hi.
It sounds like the battery has gone flat, and you have lost everything from the register. Since Royal usually just bought TOWA registers and re-branded them, try the TOWA RAM clear:

Turn key to P or program mode.
Turn power off at wall.
Hold C or CLEAR while turning on at wall.

Mark
July 2009