Electric energy management terminal using controller LAN to implement internal communication and control method thereof

Abstract

This invention relates to an electric energy management terminal and control method of inner communication by controller LAN , which includes the main control module parallel connected to the controller LAN by CAN connector, landing table module, impulse module, remote communication module, display module, communication module that connects with the main control module, power module that connects with each module. The control method includes the following steps: 1, the main control module sends data in double direction to the attempering center through the communication module; 2, the main module attempers data, releases data, controls and connects each function module on CAN bus; 3, landing table module, impulse module, remote communication module, display module receives main module demand to run each function, such as landing table, reading data, then it sends the data to the main module by CAN bus.

Description

technical field [0001] The invention relates to an electric energy management terminal used in the electric power industry, in particular to an electric energy management terminal and a control method using a controller local area network for internal communication. Background technique [0002] At present, the structural modes of power management terminals in the power industry mainly include single microprocessor mode, multi-microprocessor and parallel bus mode, multi-microprocessor and I2C bus mode, and 485 bus mode. [0003] Please refer to Figure 1, the first type is a power management terminal with a single microprocessor structure, which includes: processor MCU, meter reading module 2, pulse module 3, remote signaling module 4, display module 5, communication module 6 and power supply module 7; the master control module that is made of single microprocessor MCU is respectively connected with meter reading module 2, pulse module 3, remote signal module 4, display modul...

AI Technical Summary

Problems solved by technology

[0011] The real-time performance of the 485 bus is poor, and it does not support multi-master communication

Since the MAX485 chip used by the 485 interface has no registers and no arbitration mechanism, the 485 interface has the following defects: Although it is a two-wire communication, it cannot provide inter-module communication with a high data transfer rate due to the low communication rate; RS485 communication The mode does not support multi-master communication (communication between two adjacent modules can only be forwarded through the master node, which takes a long time on the bus, which is inefficient in a network with high data traffic

And does not support bus arbitration; does not support bus error detection; the sending node does not know the correctness of communication; if one node fails, the entire system will be paralyzed (this is the most terrible in communication); it does not support the module in the bus network priority

[0012] Since there can only be one master node in the 485 communication network, and the 485 communication can only be initiated and terminated by the master node, the slave node does not have this right, so each data collection of the meter reading module can only be done after receiving the command. The data acquisition program will be started, which may lose the historical data during the operation of the equipment and affect the integrity of the data

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