An access control system based on ProfiNet bus and RFID card reading and identification

Bus Access Control is an access control system that we tend to ignore. With the continuous development of related technologies, the access control security system has gradually developed from the early small-scale, mechanized, contact access control system to the current intelligent, information-based, and comprehensive management and control system. access control system. The core technology that can reflect the "identity" of modern intelligent access control systems mainly refers to automatic identification technology and network communication technology. Due to strict factory authority management, the factory workshop only has an internal LAN, and the bus of various equipment in the factory is highly integrated, especially at high-tech manufacturing sites such as automobiles, nuclear power, and aerospace. The access control system channel is integrated into the factory bus for control and scheduling. Profinet is The most widely used bus in industrial sites, thus giving birth to a new application environment for Chenkong Intelligent's FRID Card Reader that supports the Profinet protocol.

     Take the painting workshops of a certain automobile factory in Changchun, Qingdao, Tianjin, Chengdu, and Foshan as examples. The workshops have a high degree of automation, and all equipment is bus integrated. There are 105 Profinet bus access doors in the painting workshop, and the access rights of personnel are strictly controlled. The RFID Card is bound to the worker's ID information. The RFID card reader senses the worker before entering the channel. The information enters the Profinet system through the Ethernet. The system gives an instruction to allow passage, and the automatic door opens.

Access control channel display diagram

     PROFINET is a series of standards, the full English name is ProcessFieldNet, a new generation of automation bus standards based on industrial Ethernet technology launched by PROFIBUS International Organization PI (PROFIBUS International). In short, the profinet industrial bus is a commonly used communication protocol in industry, and The coverage is very high. PROFINET provides a complete network solution for the field of automation communication, covering current hot topics in the field of automation such as real-time Ethernet, motion control, distributed automation, fail-safety and network security, and, as a cross-vendor technology, It is fully compatible with industrial Ethernet and existing fieldbus (such as PROFIBUS) technology.

relative devices

     A high-frequency RFID tag reader based on radio frequency identification technology. The working frequency of the reader is 13.56MHZ. It supports reading of I-CODE2, I-CODESLI and other tags that comply with the ISO15693 international standard protocol format. The card reader supports both standard industrial communication protocols ProfiNet and modbusTCP. The reader uses a high-strength aluminum alloy casing and has the characteristics of fast recognition speed, high accuracy, moderate recognition distance, and convenient networking. It is suitable for industrial data procurement.

  Project technical parameters

  Power supply mode POE power supply (Power over Ethernet 46-54V) DC 24V

  Power consumption 2.5W

  Circuit protection with reverse polarity protection

  Working frequency 13.56MHZ

  Protocol standard ISO15693

  Supports maximum tag capacity 8KBytes

  Card reading time ReadTime: 15mseach8Bytes

  WriteTime: 35mseach8Bytes

  Card reading distance 0-100mm

  Communication interface Ethernet

  Communication protocol ProfiNet

RFID card

     A national high-tech enterprise that provides identification system components and solutions based on RFID technology for industrial manufacturing, it has complete industrial site RFID system technology and solutions.

1. Flexible wiring and cost saving

In many cases, especially in factory automation production, RFID is often distributed in various environments. The RFID Reader uses POE power supply technology. One network cable transmits data and power supply at the same time, eliminating the need for expensive power supplies and the installation of power supplies. Time wasted, cost and time saved.

2. Safe and convenient

The POE power supply end device will only power the equipment that needs power supply. Only when the equipment that needs power supply is connected, the Ethernet cable will have voltage, thus eliminating the risk of leakage on the line. Users can safely mix legacy and POE devices on the network, and these devices can coexist with existing Ethernet cables.

3. Convenient for remote management

Like data transmission, POE can supervise and control the device by using the communication protocol Modbus. This function can provide functions such as night shutdown and remote restart.