Method of detecting disconnection and power discontinuity of...

Details Method of detecting disconnection and power discontinuity of... Method of detecting disconnection and power discontinuity of...

2011-05-10

2011-05-10

Nguyen, Hoai-An D (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C709S224000, C713S340000

Reexamination Certificate

active

07940057

ABSTRACT:
A power discontinuity occurring in any one of a plurality of I/O units connected to a numerical controller is detected. When the power discontinuity occurs in any one of the I/O units, the I/O unit detects the power discontinuity, and transmits the detection of the power discontinuity to an I/O unit in front of the I/O unit, at a timing different from a timing of an ordinary communication, in the form of a communication packet having a data pattern different from an ordinary data pattern. When the front I/O unit receives the communication packet, the communication packet is stored in a memory as power discontinuity detection information.

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