Machine control panel
AssigneeFanuc Corporation
InventorsYuuki KUROKAWA, Yasushi NOMOTO
Life of this patent
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Abstract
A key switch on a machine control panel is provided with two contacts such that the machine control panel can include two independent communication circuits. Signals from a double-contact key switch are received by the two communication circuits, and safety-related signals are transmitted from the communication circuits to a numerical controller through a bus. The signals received by the numerical controller are compared with each other so that they can be made to comply with the safety standards by monitoring the integrity of the safety function.
Claims3
A machine control panel connected to a numerical controller for controlling a machine tool and configured to operate the machine tool, comprising:
- a key switch provided on the machine control panel;
- first and second contacts configured to be turned on when the key switch is depressed;
- a first communication circuit connected to the first contact and configured to receive a signal of the key switch;
- a second communication circuit connected to the second contact and configured to receive a signal of the key switch;
- a transmission line connecting the first and second communication circuits and configured to transmit the signal of the second communication circuit to the first communication circuit;
- and
- a transmission line configured to transmit the signals of the first and second communication circuits from the first communication circuit to the numerical controller.
Dependencies are inferred from the claim text.