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:
Apr. 06, 2010
Filed:
Sep. 08, 2004
Brian A. Franchuk, Richfield, MN (US);
Roger R. Benson, Eden Prairie, MN (US);
Brian A. Franchuk, Richfield, MN (US);
Roger R. Benson, Eden Prairie, MN (US);
Fisher-Rosemount Systems, Inc., Austin, TX (US);
Abstract
Devices in a process control system communicate by data messages over a communication medium segment. Each device includes a communication controller that includes a received data memory and a plurality of received message objects. When a message is received, a received message object is activated, and the initial position of a write pointer in the received data memory is stored in the received message object. During message reception, if a hardware device determines that the message is to be ignored, the received message object is deactivated, thereby preventing further writing of the message to the received data memory. The write pointer is then preferably returned to its initial position as stored in the received message object.