Just bought an old 8055i control with a plan to fit it to a Bridgeport, I need to either modify the existing PLC program or delete it altogether and start afresh. The problem is that it seems to be locked, it does not ask me for a password but trying to edit it there is a message saying "This program may not be MODIFIED", I can not even read the program and figure out what should be connected to which pin. I tried disconnecting the battery in the hope it would lose the program but there appears to be a backup capacitor on the board and I am wary of shorting it out. It did reset the date and time but the PLC is still there and locked out. If anybody out there has any ideas it would be much appreciated because the control is other wise useless. Thanks in advance Dave