Patent ID: 6909923
Filing Date: 2005-06-21
Classification: G05B,Y02P

Abstract:
1. A backplane system for interconnecting components of an industrial controller for safety operation comprising: (a) a backplane having at least one conductor for conducting data as digital messages; (b) at least two industrial controller components having connectors allowing connection of the industrial components to the conductor of the backplane for the communication of messages thereon; (c) a safety protocol means enforcing a communications protocol on messages communicated over the backplane among industrial controller components to provide an error indication upon any of: (i) loss of a message transmitted from one component to a second component; (ii) corruption of a message transmitted from one component to a second component; and (iii) misdirection of a message transmitted from one component, intended for a second component, to a third component; (d) the safety protocol means places the industrial controller in a predetermined safety state upon a predetermined error indication.