Discovering and safely transitioning transactors to run mode
AssigneeRockwell Automation Technologies, Inc.
InventorsDouglas F. Tiedt, Michael W. Wielebski
Life of this patent
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Abstract
For discovering and safely transitioning transactors to a run mode, a message module determines if a message received from a communication master after a reset is a discovery message and determines if the message is an initial message received from the communication master. A command module, in response to the message not being the discovery message and the message being the initial message, activates a safety fault. In addition, the command module, in response to the message not being the discovery message and not being the initial message, determines whether the message comprises a valid safety command. In response to the message including a valid safety command, the command module enters the run mode.
Claims20
An apparatus comprising:
- a message module that determines if a message received from a communication master after a reset is a discovery message and determines if the message is an initial message received from the communication master;
- a command module that:
- in response to the message not being the discovery message and the message being the initial message, activates a safety fault;
- in response to the message not being the discovery message and not being the initial message, determines whether the message comprises a valid safety command, wherein in response to the message comprising a valid safety command, the command module enters a run mode,
- wherein message module and the command module are implemented in semiconductor hardware.
A method comprising:
- sending, by use of a processor, a discovery message to a logic interface;
- in response to receiving a discovery message response from a responding logic interface, recording a responding logic interface identifier for the responding logic interface;
- in response to a loop count exceeding a loop threshold, sending a safety message to the responding logic interface.
A method comprising:
- determining, by use of semiconductor hardware, if a message received from a communication master after a reset is a discovery message;
- determining if the message is an initial message received from the communication master;
- in response to the message not being the discovery message and the message being the initial message, activating a safety fault;
- and
- in response to the message not being the discovery message and not being the initial message, determining whether the message comprises a valid safety command, wherein in response to the message comprising a valid safety command, entering a run mode.
Dependencies are inferred from the claim text.