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:
Jan. 04, 2005
Filed:
Sep. 20, 2001
Michael R. Massie, Bristol, TN (US);
Michael R. Massie, Bristol, TN (US);
Siemens Energy & Automation, Inc., Alpharetta, GA (US);
Abstract
A communication interface involves a processor that communicates to expansion modules in order to read and write discrete input/output, analog input/output, intelligent module control, and expansion module status. The expansion modules can be application specific integrated circuits (ASIC), each having a state machine architecture that responds appropriately to the input/output expansion bus signals. The ASIC can include error detection using the first byte of messages from the controller. Thus, the ASIC detects when an erroneous message from the controller has been communicated and transmits a message to expansion modules that their output states not be changed in response to the message from the controller.