3 Drainage pump station operation support center hardware design
The remote safety communication system, for the equipment on the site of the drainage pump station, in order to achieve the real-time online diagnosis and real-time observation of the on-site action of the program in the remote operation support center of the engineer,
The control equipment on the site of the drainage pump station can be connected to the Internet public network through the wired or site WIFI overlay system, or it can be connected to the operation support center through wireless Internet access.
Different configurations, for the drainage pump station, can simultaneously connect different numbers of sites for real-time online diagnosis, early warning, maintenance, upgrade, etc. The key point is to achieve program-level access to the programmable controller, download program, online diagnosis It is no longer a trouble problem, maximizing the cost savings required for each failure or debugging, and realizing the current informationization, realizing the intelligent and networked IoT, and realizing the data storage by the remote central server. Cloud computing, the integration of traditional industrial control and IT Internet with real industrialization and informationization.
4 Drainage pump station operation support center software design
4.1 Principle design
In the secure communication system, the software and hardware design realizes the functions of industrial protocol for parsing, encryption and routing, switching, firewall, etc. When transmitting over the public network, the S-Link protocol is dedicated to transmitting industrial data. A stable, secure private key agreement. In the operation support center, the SY-RSCM is used for verification and verification, and then an accurate and safe unpacking is delivered to the target object.
4.2 Safety design
Through the system, the remote management of the full application cycle of the drainage pumping station equipment is realized: installation, early warning, debugging, fault diagnosis, upgrade, and attention to the security in the information communication process, which is reflected in the following four aspects:
(1) The application of the remote security communication module not only realizes the expansion of industrial data from the local area network to the wide area network, but also has its own hardware firewall function. It can check and monitor the data packets of each layer to implement content filtering, intrusion detection, intrusion protection and other functions. The S-link protocol can be converted to industrial data.
(2) The remote security communication module also has identity authentication technology, which can realize device authentication and user authentication, so that industrial data can only be transmitted directly in the certified module, and the operator with the certification permission can read the data.
(3) The industrial data is transmitted in the Internet, using the S-Link protocol. This protocol was developed specifically for industrial data WAN transport. It is based on the non-universality of standard protocols, as well as the special requirements of industrial fieldbus, a non-public key mode proprietary protocol with the aim of protocol conversion accuracy and security as the primary goal. The RSA algorithm is adopted, and the key is up to 1536. A bit-encrypted asymmetric key, encrypted in combination with a public key and a private key. The application of the S-link protocol ensures the confidentiality, authenticity and integrity of industrial data WAN transmissions.
(4) The whole system adopts virtual LAN VLAN technology, and each device is logically divided into a local area network to meet the real-time requirements of industrial data transmission. At the same time, industrial data can only be transmitted in the same VLAN, preventing the broadcast of data on the Internet and improving the security of industrial data transmission.
