1070 results about "Modbus" patented technology

A system and method for providing easy access to an internal file structure of an intelligent electronic device (IED), e.g., a power meter, not presently defined or supported directly by legacy protocols used in metering industry, such as the Modbus protocol.

An interface module is operatively coupled to a Fieldbus process control network and a Modbus process control network to facilitate the exchange of process control information between the networks. The interface module stores a register map database in which the process control parameters of the function blocks in the field devices of the Fieldbus process control network are mapped to register numbers of the Modbus process control network. Once the Fieldbus process control parameters are mapped to the Modbus registers, the interface module is adapted to transmit request messages on the Fieldbus process control network to the Fieldbus field devices for the current values of the process control parameters, receive response messages from the Fieldbus field devices, and store the current values of the process control parameters in the register map database.

A method for adapting a computer-to-computer communication protocol, and especially TCP / IP, or any protocol implemented in a general purpose off-the-shelf network like Ethernet, for use in providing communication needed in an industrial control system, and especially an industrial control system using a programmable logic controller (PLC), where there is frequent communication between the PLC and control or monitoring elements, the method aimed at allowing the PLC to perform scanning of its ladder logic at a rate adequate for effective industrial control. The method includes making permanent-type TCP connections between the PLC and a control element or a monitoring element, use of a protocol for communication with a control or monitoring element in which both a read register and a write register instruction is included in a single communication transaction, such as a MODBUS command, and tuning communication between the PLC and a control element or a monitoring element.

The invention relates to a multi-protocol gateway and protocol conversion method accessing industrial radio network into MODBUS / TCP industrial Ethernet and PROFIBUS-DP field bus based on IEEE802.15.4a. The multi-protocol gateway comprises microprocessor, MODBUS / TCP main station, IEEE802.15.4a radio main station, PROFIBUS-DP slave station, extent SDRAM memory and FLASH memory, RJ45 network port, 486 physical layer interface, USB interface. The circuit connection style is that the microprocessor is positioned at center; the DM9161EP Ethernet physical layer interface chip extends via MDIO interface; the PROFIBUS-DP protocol chip SPC3 connects via internal bus, the NA1TR8 radio protocol chip connects the circuit via SPI bus; the USB interface extends from the circuit. The protocol conversion method of multi-protocol gateway is controlled by microprocessor for implementing protocol conversion among three networks. The invention implements wired / wireless Heterogenous control network gateway fitting the demand for industrial real-time and open data communication considering the status of wired spot bus / industrial Ethernet for the present and combining the wireless network frontier technology.

The invention relates to an energy-saving optimized control system and an energy-saving optimized control method for a refrigerator room. The energy-saving optimized control system comprises an industrial control computer, a flow sensor, a temperature sensor, an outdoor temperature and humidity sensor, a three-phase active power transmitter, a water pump frequency converter and a cooling tower fan frequency converter which are connected with a programmable logic controller respectively, wherein the programmable logic controller communicates with the industrial control computer through an industrial Ethernet; and an RS485 communication interface module is connected with a water cooling unit and communicates with the industrial control computer through a ModBus protocol. A mathematical model of relationships between the energy consumption and running parameters of each equipment in the refrigerator room is established to regulate the running state of each equipment in combination with real-time refrigeration loads and weather parameters, thereby fulfilling the aim of making the lowest running energy consumption of the whole refrigerator room at the premise of meeting the refrigeration loads.

A system and method is provided for simultaneous communications on Modbus and DNP 3.0 over Ethernet for an electronic power meter. The system incorporates one or more protocol wrappers to provide compatibility with both Modbus and DNP based applications. The system removes the appropriate wrappers and routes the incoming data packet to its destination. Additionally, the system also wraps outgoing response packets with the appropriate protocol wrapper based on the related data packet wrappers.

The invention discloses an industrial control type automatic network communication protocol converter and a communication protocol conversion method. The network communication protocol converter comprises a microprocessor, an upper end connector expanding circuit, a lower end connector expanding circuit, a memory and a power supply circuit, wherein the upper end connector expanding circuit comprises a serial communication interface, an Ethernet interface, a hardware protocol stack chip, a software protocol stack chip and a switching switch for switching communication of the hardware protocol stack chip and the hardware protocol stack chip, and an upper computer; the serial communication interface is used for realizing connection of the microprocessor and a Modbus network; the Ethernet interface is used for realizing connection of the microprocessor and industrial Ethernet; and the lower end connector expanding circuit comprises a plurality of serial communication interfaces which are in communication connection with a plurality of lower computers one by one. With the adoption of the industrial control type automatic network communication protocol converter, the mutual conversion of free protocols and Modbus RTU (Remote Terminal Unit) protocols or TCP / IP (Transmission Control Protocol / Internet Protocol) can be realized, and the requirements of field-grade control and remote control are met.

The invention discloses an energy storage battery management system. A distributed three-layer management system is adopted in the system, wherein the management system comprises a bottom BMU (Battery Measurement Unit), a middle BCMS (Battery Cluster Management System) and a top BAMS (Battery Array Management System). The bottom BMU comprises a voltage and temperature measuring module and a charging / discharging balancing module; the middle BCMS is the core of the battery management system and comprises a voltage temperature treatment module, a balance control module, a relay control module, an AD (Analog and Digital) collecting module and a core parameter calculating module; and the top BAMS comprises a battery information gathering module, a system alarm information treatment module, a BAMS-PCS (Battery Array Management System-Process Control System) communicating module and a BAMS-PCS-upper monitoring system communicating module. Information transmission in the three layers of structures in the system is realized by using a CAN2.0B communication protocol; and the communication between the BAMS and an energy conversion PCS system and an upper monitoring system is realized by using a Modbus TCP (Transmission Control Protocol). On account of the special requirement on the battery management system in the field of energy storage, the invention provides the energy storage battery management system which is high in reliability, complete in function, real-time and stable in communication and relatively complete in management system structure.

The invention discloses an industrial control network Modbus protocol-oriented data flow anomaly analysis method. The method comprises the following steps of 1, an initialization phase, wherein a Modbus protocol data flow anomaly analysis model is generated; 2, an initialization phase, wherein a Modbus protocol self-learning normal behavior model is generated; 3, a run phase, wherein the run state of Modbus protocol data flow is judged; 4, a run phase, wherein the normal / abnormal behavior state of Modbus protocol data messages is judged; 5, representing, wherein the results in the step 3 and the step 4 are visibly represented. The method is designed on the basis of deeply knowing the Modbus protocol and the anomaly analysis technology, good comprehensiveness and practicality are achieved, the efficiency of anomaly analysis can be effectively improved, and Modbus abnormal data flow existing in an industrial control system can be efficiently found through the method.

The invention relates to an industrial field data collecting and analyzing system based on a Modbus, and belongs to the technical field of Modbus data collecting and analyzing systems. According to the industrial field data collecting and analyzing system based on the Modbus, an embedded platform serves as a core, the embedded platform is connected with Modbus equipment such as an PLC, an HMI, an I / O and an intelligent instrument in an industrial production field and a network through serial links, related technological production parameters are inquired in a data collecting cycle set according to a certain time cycle, and the related technological production parameters are collected, stored and analyzed. Meanwhile, connection is established between the embedded platform and an upper computer through a TCP / IP, Modbus TCP real-time requests and technological parameter data file uploading requests are responded dynamically, and remote industrial field data inquiring, monitoring and informatization management are achieved.

Software in MPU builds united message model to realize protocol conversion in application layer among MODBUS / TCP industrial Ethernet, DeviceNet field bus and Profibus DP field bus. Corresponding interface module and communication adapter modules at main nodes realize their relevant protocols. Through an internal bus, protocol conversion device built from a MPU is connected to industrial Ethernet interface module, DeviceNet communication adapter module at main node, Profibus DP communication adapter module at main node and a SRAM. Through a serial peripheral interface, MPU is connected to an electrically erasable memory. The invention solves converting protocols based on different standards. One communication frame is compatible to multiple industrial communication networks so as to meet requirements of network real-time at low-layered devices as well as high rate and large capacity of network on information layer.

The present invention is directed to facilitating communication within an automation system having a plurality of networks and network protocols. Specifically, a Modbus network is operably connected to a network. A fieldbus coupler operably connected to both networks having a program facilitates communication within the automation system wherein devices connected to the network can be accessed for monitoring and / or controlling via Modbus commands. The fieldbus coupler (FBC) program accepts a Modbus function code containing one or more embedded message of varying types. The FBC program using additional information contained in the Modbus function code and the message type reads or writes only the required information to and from the field devices. This specific read or write request of the information and the embedding of more than one message type reduces overhead and bandwidth usage, thus improving bus response time and efficiency.

The invention discloses an address automatic allocation method. A Modbus master station sends broadcast address setting commands and sets station addresses of all Modbus slave station devices as the same fixed address; broadcast Modbus slave station device serial number read commands are sent; the Modbus slave station devices return messages responding to the Modbus slave station device serial number read commands; the Modbus master station broadcasts and issues slave station address setting commands carrying the slave station device serial numbers and the slave station addresses in sequence,according to a list of the received Modbus slave station device serial numbers; and the Modbus slave station devices analyze the slave station device serial numbers and the slave station addresses, and if the slave station device serial numbers are equal to own serial numbers, own slave station addresses are modified, thereby realizing address automatic allocation. The invention also provides an address allocation Modbus master station and Modbus slave station applicable to a Modbus protocol, and a system.

The invention discloses a method which allocates addresses for the slave node devices in the Modbus communication network; the method includes the steps that the master node device and the slave node devices are initialized; the address of a slave node device is set and the number of the slave node devices is set; the master node device sends the address polling message to each slave node device periodically; when a slave node device receives the address polling message with the data which is the same as the address of the slave node device, the slave node device returns a message which carries the address of the slave node device to the master node device; when the master node device judges that the address of the slave node device is different from the stored address of the master node device, the master node device stores the address of the slave node device; when the number of the addresses of the slave node devices stored in the master node device is equal to the number of the slave node devices, the flow ends. The method which allocates addresses for the slave node devices in the Modbus communication network can conveniently examine that if the address allocation of the slave node devices is completed correctly.

The invention relates to an embedded type state monitoring information adaptor capable of operating under complex working conditions of a numerically-controlled machine tool and a method thereof. Theembedded type state monitoring information adaptor mainly comprises three modules of a PLC communication module, a standard information output module and a configuration module. The embedded type state monitoring information adaptor communicates with a monitor computer by the Modbus based transmission control protocol / internet protocol to realize the receiving and the transmission of the data information; the embedded type state monitoring information adaptor communicates with the control PLCs in real time and receives and transmits the data; and the embedded type state monitoring informationadaptor detects the communication states with all control PLCs in real time, and if errors occur, the embedded type state monitoring information adaptor stores the diagnostic information in a designated buffer memory area. In the adaptor, the isomorphism of the equipment in an isomerical environment is realized as the signals of equipment from different enterprises are uniformly converted, and the'data rather than people are transmitted' is realized by intelligently monitoring and diagnosing the numerically-controlled machine tool by the network, so the passive situation that the maintenancepersonnel is busied at maintaining the equipment is changed when the equipment is out of work.

A networking system is discussed. The system may be used for industrial networks where access to field device data is valuable. Commands, such as read or write requests to particular field device data, may be encapsulated within application layer protocol messages, such as MODBUS messages. Responses to the commands may also be encapsulated within MODBUS messages. The encapsulated commands and responses may be transmitted between various devices of an industrial network, including a controller and a gateway device, such as a multiplexer, of the industrial network. Encapsulating the commands and responses may provide a tunneling mechanism allowing a controller complete access to the data of the field devices in communication with the gateway device.

The invention relates to the ground source heat pump technique and particularly relates to a device for monitoring the ground source heat pump system based on the internet of things. The device comprises a soil temperature wireless sensor, an outdoor air temperature wireless sensor, an indoor temperature wireless sensor, water inlet-outlet temperature wireless sensors arranged on a cold-hot resource side and an air conditioner loading side of a cold water machine set, a flow wireless sensor, a wireless intelligent ammeter, a wireless signal collecting module, a local server and a remote monitoring computer. The wireless signal collecting module collects the parameter of each sensor according to the ZigBee protocol, transmits the parameters to the local server by the Internet according to the Modbus protocol, and then stores, computes and displays the COP (coefficient of performance) and the WTF (water transport factor) curves by the ground source heat pump system, and finally transmits the parameters to the remote monitoring computer by the Internet. The device can obtain the CPI (comprehensive performance index), the COP (coefficient of performance) and the WTF (water transport factor) of the ground source heat pump, and is beneficial to monitoring the daily energy-saving situation of the ground source heat pump system and providing evaluation data for the energy-saving improvement of the system.

A multi-circuit direct current monitor consists of a plurality of Hall Effect current sensors mounted on a printed circuit board oriented to sense the direct current (DC) flow from power generating devices such as solar arrays, output from the Hall Effect sensors connected to an analog to digital (A / D) converter which in turn is connected to a microprocessor. The multi-circuit direct current monitor continuously monitors instantaneous and average current values for each circuit as well as total instantaneous current and average current for all active circuits. The multi-circuit direct current monitor provides continuous communications via Modbus RTU as well as providing alarm outputs if one or more circuits deviates from the average output by a percentage greater than the user specified threshold for a user-defined period of time to detect failed or underperforming power output devices.

The invention discloses a multi-protocol?conversion equipment which introduces a wireless ZigBee network based on IEEE802.15.4 standard to a CAN bus and MODBUS / TCP?industrial?Ethernet?and the realization method thereof. The equipment comprises a microprocessor, a ZigBee wireless main?station, a CAN bus site and an MODBUS / TCP slave station; the microprocessor serves as the control center of the equipment and completes information analysis and distribution among different protocols; an Ethernet physical-layer chip is connected with the microprocessor via an MII interface and an MODBUS / TCP slave station module is built; through connection with a CAN controller via an input bus RX and an output bus TX, a CAN bus main station module is built; a wireless radio frequency chip CC2530 is selected to serve as the ZigBee wireless main?station of the equipment and the wireless radio frequency chip CC2530 is connected with the microprocessor via a USART for data exchange. According to the multi-protocol?conversion method of the invention, data conversion among three protocols of teh ZigBee wireless network, the CAN bus and the MODBUS / TCP?Ethernet are completed through opening an address?conversion mapping?table and a wireless / wired?heterogeneous control network is realized.

The invention discloses an OPC UA conversion apparatus of a Modbus communication protocol. The apparatus comprises an OPC UA address space management module, an address space browsing module, a data read-write module, a data subscription module, an OPC UA communication module, a parameter configuration module, a Modbus serial port communication processing module and a Modbus / TCP communication processing module. The invention also discloses an OPC UA data conversion method of a Modbus communication protocol. A Modbus communication protocol is converted into an OPC UA protocol, multiple Modbus devices based on serial communication or TCP communication are packaged to form an OPC UA server, and an OPC UA client program conforming to the OPC UA protocol performs reading, writing and subscribing operation on data of these Modbus devices according to an OPC UA standard. A new technical standard OPC UA technology is introduced to the devices using the Modbus communication protocol, the Modbus devices are enabled to acquire and modify the data of the Modbus devices directly according to the OPC UA standard, and the devices using the Modbus communication protocol can operate normally in the new standard without changing software and hardware.

The invention puts forward a PSO-OCSVM based industrial control system communication behavior anomaly detection method based on an OCSVM algorithm. According to the invention, an improved one-class support vector machine algorithm is adopted to establish a normal communication behavior profile according to a normal Modbus function code sequence, a PSO-OCSVM method for parameter optimization based on a particle swarm optimization (PSO) algorithm is designed, and an intrusion detection model is established to identify abnormal Modbus TCP communication traffic. The method of the invention improves the reliability and efficiency of anomaly detection, and is more suitable for practical application.

The invention relates to an access method of Modbus equipment. The access method comprises the following steps that configuration files comprising data configuration information and protocol configuration information are preset; an intelligent equipment gathering dynamic library reads and analyzes the configuration files, and the data configuration information obtained through analysis of the configuration files is stored in internal variables of the intelligent equipment gathering dynamic library; and when the Modbus equipment is accessed, the data configuration information is extracted from the internal variables of the intelligent equipment gathering dynamic library according to operation commands to communicate with the Modbus equipment. The invention further provides an access system of the Modbus equipment. The access method and the access system of the Modbus equipment can reduce development workload, and reduce complexity of code maintenance.

A system and method is provided for simultaneous communications on Modbus and DNP 3.0 over Ethernet for an electronic power meter. The system incorporates one or more protocol wrappers to provide compatibility with both Modbus and DNP based applications. The system removes the appropriate wrappers and routes the incoming data packet to its destination. Additionally, the system also wraps outgoing response packets with the appropriate protocol wrapper based on the related data packet wrappers.

An intelligent electronic device (IED) having a programmable display is provided. The present disclosure provides for defining screens of a display on a revenue based energy meter. The method utilizes Modbus registers and defines a programming technique wherein a user can custom make any desired screen for every application based on what a user needs. The programming utilizes Modbus registers maps to allow for the customizable screens. Moreover, the display interface allows for customized labeling to provide notice and information to users as to measured parameters other than electricity that the meter might be accumulating such as steam, water, gas or other type of commodity.

A supervisory control and data acquisition protocol converter having encoded meter register input ports which are able to interrogate, read, and retain data stored in viscous fluid or gas meter registers which communicate with the Automatic Meter Reading (AMR) protocols and convert that data upon request to an industrial monitoring and control system protocol such as MODBUS®, DF1, EtherNet / IP™, or ADAM 4000. The present art further provides serial RS-232C and RS-485, and Ethernet ports whereby said data may be transmitted and / or the apparatus may be setup according to user defined specifications. The present art apparatus also provides industrial standard pulse (0-5 volts) and current (4-20 milliamps) inputs. The present art further provides a user configurable display which may display any or only a portion of the aforesaid data along with other user desired data. The apparatus further serves a web page over the Ethernet port with the aforesaid data populating a table.

The invention discloses an RS485 bus communication method based on a Modbus protocol and a power electronic system based on the communication method. A master controller and slave controllers of the power electronic system communicate through the RS485 bus communication method based on the Modbus protocol. According to the RS485 bus communication method, the structures of communication frames generated by the controllers are defined, and reasonable communication frames and processing logic are defined through structural design of a communication program, which improves the communication efficiency and the utilization rate of an RS485 bus communication system, accelerates the speed of data response, and greatly reduces the transmission delay. The adopted RS485 bus communication system is high in communication reliability, low in cost and easy to implement, and is suitable for application in large-scale power electronic systems.

The invention relates to an oil derrick stress data acquisition system based on a fiber Bragg grating sensor network, comprising an oil derrick stress strain field data test subsystem based on a distributed fiber Bragg grating sensor network, an oil derrick stress strain field data transmission and storage subsystem based on a serial port communication technology, and an oil well reliability evaluation subsystem based on OLE (Object Linkingand Embedding) technology and a Matlab calculation procedure. The three subsystems are connected with a fiber Bragg grating demodulator RS232 interface through an ADAM communication module by an industrial control computer; data in each channel in a fiber Bragg grating analyzer are read by adopting a Modbus communication protocol and an address distinguishing technology, and the field stress strain data arithmetic mean is filtered by the industrial control computer and then read into Access background database. The invention can rapidly and accurately evaluate the bearing capacity of land and ocean oil derricks and provide a great amount of full and accurate stress strain measurement data for the research and the evaluation of the safe and reliable operation of oil derricks.

The invention relates to a universal intelligent lightning protection monitoring module and a method thereof. The monitoring module comprises a single chip, a liquid crystal display module, an MAX485 communication chip, a temperature sensor, a current conditioning circuit, an inductance coil, a power circuit and a relay. Work states of a lightning protection device are monitored by the single chip ATMEGA16L through collecting electric level at an output end of a photoelectric coupler TLP521; through the current conditioning circuit, lightning stroke times and leakage current are acquired; through the DS8b20 temperature sensor, a temperature signal of a valve block is transmitted to an ATMEGA16L interrupt port 1; through a pulse signal output by an oscillator, the temperature is measured; a thermal trip signal, the lightning stroke times and the temperature of the valve block and leakage current data which are acquired by the single chip ATMEGA16L are stored in a 24C16 storage chip and then are displayed through the LCD1602 liquid crystal display module; the data are converted into an MODBUS protocol and then are uploaded through an RS485 interface or an RS232 interface; and information of the lightning prevention device is displayed through a self liquid crystal display screen, so that the in-place observation can be carried out conveniently and then gaps in the prior art are filled.

The invention discloses a depth packet detection platform based on an industrial SCADA system. The detection platform can be used for detecting the system state by means of Modbus / Tcp and IEC 60870-5-104 protocol which are commonly used in a power system. The detection platform includes four parts: an industrial SCADA system simulation platform, a depth packet analysis module, an abnormity detection module and an intrusion module. Based on the typical interactive mode of periodic polling in SCADA system, the detection platform simulates the normal network data flow in power system, and simulates the abnormal state of the system and the corresponding network data flow by protocol vulnerability analysis and message variation. Feature analysis and extraction of the message field information,through the machine learning method to build a system state model, to achieve the integrity of the system state, in-depth detection.