Appliance comprising a digital programming device which is...

G - Physics – 05 – B

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G05B 15/02 (2006.01) G05B 19/02 (2006.01) G05B 19/04 (2006.01) G06F 11/00 (2006.01)

Patent

CA 1171503

PHN 9769 27 ABSTRACT: An appliance comprises a digital programming device for forming a sequence of control signals. When the device is switched on by way of the mains plug, an unpre- dictable switch-on phenomenon occurs and the program memory is liable to be addressed in a variety of locations. There- fore, during a preparation routine the start conditions (initial conditions) are realized. Furthermore, a multi-bit code is generated and stored in a volatile section of the memory. The operative routine comprises a sub-routine which tests this code. If the code is not correct, the prepara- tion routine has not been followed when the appliance was switched-on. The operative routine is then interrupted and first the preparation routine is executed. All further locations in the non-volatile memory section preferably refer to the preparation routine.

380109

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