Coupling communication plate based on EtherCAT technology

Abstract

The invention discloses a coupling communication plate based on an EtherCAT technology. The coupling communication plate comprises a controller and a microprocessor connected with the controller through an SPI bus; at least one external communication interface electrically connected with the controller; a bus connector in communication connection with the controller; a power supply conversion chip electrically connected with the bus connector, the controller and the microprocessor; a PHY chip and a transformer which are successively connected between the controller and the external communication interface; and a crystal oscillator for performing time synchronization on the controller and the chip. The coupling communication plate employs a modular physical structure to realize a communication management function between an EtherCAT master station and a slave station and a power supply management function; an input and output module does not have to be directly connected with a master station CPU module, and each module circuit is greatly simplified; and through a power supply conversion circuit, 24V power drawn from an external power source is converted into 5V voltage, the 5V voltage is converted into 3.3V voltage, and the 3.3V voltage is converted into 1.8V voltage.

Description

technical field [0001] The invention relates to the technical field of electrical component design. More specifically, it relates to a coupling communication board based on EtherCAT technology. Background technique [0002] EtherCAT was originally proposed by Beckhoff in Germany based on Ethernet technology. It is a technology with flexible network topology. Its characteristic is that IP / UDP is encapsulated in the protocol, so communication can be realized without IP protocol. EtherCAT technology has the following advantages: fast speed and synchronous transmission; the price of the system is lower than that of the field bus; it can be realized in hardware during real-time communication; it supports multiple topologies; it supports the communication between multiple mechanisms composed of the master station and the slave station ; Standard Ethernet frame; fully open technology; high bandwidth utilization, one network to the end, etc. The EtherCAT system is a master statio...

AI Technical Summary

Problems solved by technology

The two EtherCAT communications have their own advantages and disadvantages. Ethernet 100M transmission requires a physical layer conversion chip, and the distance is long, but the transmission rate is relatively low; while the low-voltage differential signal has a high transmission rate and local high-speed response, but it is only applicable to the PCB of the local module. board level transmission

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