Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Toshiyuki Nakamura0
Yasuo Muneta0
Date of Patent
December 30, 2008
0Patent Application Number
104815030
Date Filed
June 21, 2002
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A safety PLC 1 serving as a master and a safety slave 2 are connected through a safety network 3 to constitute a network system. The safety slave has non-safety information storing unit 26 for storing individual information and a state information of the connected safety device, the state information monitors a state of the operating safety device and a stored content is updated based on its monitored result. Then, when the non-safety information satisfying a fixed condition, at least the non-safety information satisfied the condition is transmitted to the safety PLC. That processing is performed by an MPU 23. Thus, unnecessary non-safety information is not transmitted.
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