EPA (ethemet for plant automation) on-chip system, EPA communication system and EPA communication method

Abstract

The invention provides an EPA (ethemet for plant automation) on-chip system, an EPA communication system and an EPA communication method in order to solve technical problems. A third non-real-time phase is added to EPA data communication on the basis of previous periodic and non-periodic communications, non-EPA messages can be supportively and compatibly dispatched and processed apart from EPA periodic messages and non-periodic messages, the on-chip system is supportive to not only EPA configuration software of an upper computer to be pre-configured but also to common EPA message dispatch to be pre-configured, and limitation of the EPA configuration software is broken through; meanwhile, parameters of macro period, module communication time slots, periodic time and the like can be determined on the on-chip system according to situations of scale and data size of entire network, and singular distribution of EPA modules by users is avoided.

Description

technical field [0001] The invention relates to EPA communication technology, in particular to an EPA on-chip system, an EPA communication system and a communication method. Background technique [0002] The Ethernet standard (Ethemet for Plant Automation, EPA) in the industrial automation industry is the mainstream technology in the field of commercial computer communication such as Ethernet and TCP / IP, which is directly applied to the communication between industrial control field devices, and on this basis, the established application An open network communication platform for communication between industrial field devices. The EPA communication modules all take the EPA core as the core, and form a system with microprocessors, MAC modules, and storage modules. The existing EPA system-on-chip also takes the EPA protocol stack as the core, and is composed of a microprocessor, a storage module, and an on-chip bus, but the existing EPA system-on-chip has the following disadv...

AI Technical Summary

Problems solved by technology

[0003] 1. It simply implements the communication scheduling and clock synchronization functions of EPA. When a device in the network fails and needs to be replaced, the entire network must be stopped for device replacement to continue communication, and online plug and play cannot be realized.

[0004] 2. Its configuration is usually based on EPA configuration software. The configuration method is single, and users need to learn to use the configuration software before using it. When communicating online, it can only support the sending and receiving of EPA messages. If there are other types of If the message appears, the EPA scheduling communication will be confused and wrong

[0005] 3. On the bus architecture, the EPA core and the CPU are connected to the same on-chip bus. When the amount of EPA communication data is large, the bus will be occupied by the EPA core. At this time, if the CPU needs to read data from the MEM or write data will be in a waiting state all the time, and the real-time performance will be affected

[0006] 4. When configuring the EPA system, the user needs to calculate and allocate parameters such as communication time slot and cycle time for each module. The configuration work is cumbersome and error-prone

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