The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 2009
Filed:
Mar. 31, 2003
Ellen B. Hawkinson, Phoenix, AZ (US);
Timothy J. Fortin, Phoenix, AZ (US);
Anuradha Vidyashankar, Glendale, AZ (US);
Ellen B. Hawkinson, Phoenix, AZ (US);
Timothy J. Fortin, Phoenix, AZ (US);
Anuradha Vidyashankar, Glendale, AZ (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
An OPC redirection manager maintains the information necessary for taking appropriate action when the target OPC server fails and for ensuring that no bad status is returned to the client. Any existing OPC client needing seamless failover between target OPC data access and/or alarm and event servers will connect to a uniquely configured instance of the redirection manager instead of connecting to the primary server. The client application continues to perform OPC related tasks as usual. Because each client connection is unique, the redirection manager itself is not a single point of failure. Each configured redirection manager instance monitors the health of the target server mode and the target server itself by subscribing to failure events.