Communication device and communication system

Abstract

The invention relates to a communication device and a communication system. The communication device comprises one or more uplink network interfaces for connecting to a field device according to a preset first mapping relationship and for transmitting monitoring data of a connected field device to a processor, one or more than one uplink network interface except the network interface respectivelyand independently provided with a corresponding isolation circuit and used for carrying out line isolation of an uplink network, one or more downlink communication interfaces used for being connectedwith the field device according to a preset second mapping relation and for transmitting the first control instruction issued by the processor to the connected field device and the one or more downlink communication interfaces except the internet access respectively and independently provided with a corresponding isolation circuit and used for carrying out line isolation of downlink communication.According to the embodiment of the invention, the data processing line of the monitoring system is simplified, the communication anti-interference performance is improved, and the data transmission processing time is shortened.

Description

technical field [0001] This article involves but is not limited to communication technology, especially a communication device and a communication system. Background technique [0002] In industrial control industries such as substations and power plants, there are common problems such as inconsistency in field device communication protocols, inconsistent data interfaces, easy loss of power-off data, and prolonged input and output of monitoring status digital quantities; figure 1 is a structural block diagram of a substation monitoring system in related technologies, such as figure 1 As shown, it includes: data uplink channel and data downlink channel; among them, the data uplink channel includes: after collecting the data of the field equipment through the input acquisition module, it is converted into serial port, controller area network (CAN), program bus network (Profibus), etc. The communication signal of the protocol is converted into an Ethernet signal through the p...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned monitoring system has the following disadvantages: 1. Long construction period: Since the entire monitoring system is composed of multiple modules such as acquisition and protocol conversion, and because the module manufacturers and communication protocols may be different, it takes a lot of manpower and time to configure, Configuration and debugging, etc., make the system construction cycle long; 2. Long delay: Since the entire monitoring cycle needs to be completed by the acquisition module, protocol conversion module, switch and other modules, the communication between modules will have a long delay, causing the system Poor safety hazard; 3. Poor stability: The structure of the above-mentioned monitoring system has a large loop; once one of the components of the input acquisition module, protocol conversion module, protocol conversion module, digital output module, and switch works abnormally, or the above-mentioned components Interference and interruption of communication between them may lead to failure of monitoring and control functions, affect system work, poor stability and reliability, and easily cause hidden dangers in production safety.

In addition, the above-mentioned monitoring system requires many hardware components and a large number of cables for interconnection, and the cost is relatively high

[0004] In summary, due to the complex composition and communication processing process of the monitoring system in the related art, there are problems such as long construction period, long delay, poor stability, and high cost.

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