Title:
SAFETY NETWORK SYSTEM, SAFETY SLAVE, AND SAFETY CONTROLLER
Document Type and Number:
WIPO Patent Application WO/2003/001306
Kind Code:
A1
Abstract:
A safety PLC is connected to a safety slave via a safety network so as to constitute a safety network system. The safety slave is connected to a plurality of safety devices and acquires safety input information sets from them and transmits information based on these safety input information sets in response to a request from the safety PLC. Here, two modes are available: a result notification mode to decide whether a safety condition is satisfied according to the safety input information sets and transmit the safety decision result&semi and a detailed information mode to report the safety input information sets directly as they are. The safety response is returned by one of the modes according to a command from the safety PLC. The result notification mode has a benefit of rapid response because of a small data amount while the detailed information mode assures details of information.
Inventors:
NAKAMURA TOSHIYUKI (JP)
MUNETA YASUO (JP)
MUNETA YASUO (JP)
Application Number:
PCT/JP2002/006241
Publication Date:
January 03, 2003
Filing Date:
June 21, 2002
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
NAKAMURA TOSHIYUKI (JP)
MUNETA YASUO (JP)
NAKAMURA TOSHIYUKI (JP)
MUNETA YASUO (JP)
International Classes:
G05B9/02; G05B19/00; G05B19/042; G05B19/05; H04L12/403; (IPC1-7): G05B9/02
Foreign References:
| JPH06324719A | 1994-11-25 | |||
| GB2307068A | 1997-05-14 | |||
| JPH07282090A | 1995-10-27 | |||
| JP2002071519A | 2002-03-08 | |||
| JP2002073121A | 2002-03-12 |
Other References:
See also references of EP 1406134A4
Attorney, Agent or Firm:
Matsui, Shinichi (6-41 Akasaka 7-chome Minato-ku, Tokyo, JP)
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