Method and apparatus for industrial product tamper detection
AssigneeRockwell Automation Technologies, Inc.
InventorsAlan J. Campbell, Joseph D. Riley
Life of this patent
Estimating the term…
Abstract
A tamper detection apparatus includes a switch and a tamper detection circuit with a non-volatile memory in an industrial product enclosure. In response to the switch detecting a door or panel of an industrial product enclosure being open when an electronic component or system in the enclosure is unpowered, the tamper detection circuit stores a tamper event code in the non-volatile memory. After the electronic component or system is powered, a system processor obtains the tamper event code from the tamper detection circuit and refrains from operating a machine or process pending reset of the industrial product by a user.
Claims20
An industrial product, comprising:
- an enclosure having a door or panel that has:
- an open position that allows user access to an interior of the enclosure, and a closed position that prevents user access to the interior of the enclosure;
- a power supply located in the interior of the enclosure;
- an electronic component or system located in the interior of the enclosure, the electronic component or system selectively operative in a powered state when powered by the power supply to control a machine or process, and inoperative in an unpowered state when not powered by the power supply;
- and
- a tamper detection circuit having a non-volatile memory, the tamper detection circuit configured to:
- detect the door or panel being in the open position when the electronic component or system is in the unpowered state, and store a tamper event code in the non-volatile memory in response to detection of the door or panel being in the open position when the electronic component or system is in the unpowered state.
A tamper detection apparatus for an industrial product, comprising:
- a switch located in an interior of an enclosure, the switch including:
- a first terminal, a second terminal;
- and an actuating mechanism or circuit proximate a door or panel of the enclosure, the switch having:
- a first switch state in response to the door or panel being in a closed position that prevents user access to the interior of the enclosure;
- and a second switch state in response to the door or panel being in an open position that allows user access to the interior of the enclosure;
- and
- a tamper detection circuit coupled to the first and second terminals and including a non-volatile memory, the tamper detection circuit responsive to the switch having the second switch state when an electronic component or system of the industrial product is in the unpowered state to store a tamper event code in the non-volatile memory.
A method, comprising:
- detecting a door or panel of an industrial product enclosure being in an open position that allows user access to an interior of the enclosure when an electronic component or system in the interior of the enclosure is in an unpowered state;
- and
- in response to detecting the door or panel of an industrial product enclosure being in the open position when the electronic component or system is in the unpowered state, storing a tamper event code in a non-volatile memory in the interior of the enclosure.
Dependencies are inferred from the claim text.