Control network management system

Abstract

The present invention relates to a control network management system, capable of preventing from baleful juggle by third party, and allowing a process control wireless communication signal with a required priority and high real time response and a signal without high requirement to be of concurrence in a network. The control network management system for relaying first and second wireless communications comprises a first repeater having a packet control means for writing priority information in a header of communication packet data of the first wireless communication, as received and transmitting the communication packet data with a hash value of the header, added thereto; a second repeater having a packet control means for zero-clearing priority information in a header of communication packet data of the second wireless communication, as received, or changing the priority information to a predetermined value before transmitting the communication packet data with a hash value of the header, added thereto; and a third repeater having a priority control means for applying priority control to the header of the communication packet data received from the first repeater or the second repeater, on the basis of priority information, thereby transmitting the communication packet data to a control system.

Description

technical field [0001] The present invention relates to a control network management system for a first wireless communication based on IP (Internet protocol) and a wireless communication standard for process control, and a wireless communication based on a wireless communication standard different from IP and a wireless communication standard for process control. The relay of the second wireless communication of the communication standard, in particular, relates to the following control network management system, which can prevent tampering by a malicious third party, etc., and can make a process requiring guaranteed priority and high real-time responsiveness Signals for wireless communication for control and signals that do not require such high real-time responsiveness coexist on the same network. Background technique [0002] Currently, a technique has been proposed in which, for example, a process control system in industrial automation is configured as a wireless contr...

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Problems solved by technology

[0003] This is to solve the following problem: Since the current control system is configured as a wired network, it is impossible to install field devices such as sensors for measuring temperature and flow due to limitations in communication distance and wiring layout constraints. Optimum location within plant equipment, resulting in less precise control

[0016] On the other hand, in Wi-Fi wireless communication, compared with WirelessHART and ISA100.11a, there are not so high requirements for real-time responsiveness

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