CN102970201B - Mobility integrated method for industrial field device - Google Patents

Abstract

The invention discloses a mobility integration method for industrial site equipment, including uplink operation and downlink operation. For uplink operation, IFDIG repackages data from the industrial site, and communicates with mobile terminals through wireless interfaces such as Bluetooth and WIFI . The host application running in the mobile terminal parses the content of the received IFDCP data packet, and finally presents various parameters of the device in the form of a table. Users can operate through these parameters to complete parameterization, diagnosis and maintenance. For the downlink operation, if the user generates downlink data after the operation, the host application will encapsulate it to generate IFDCP data packets, and then send them to IFDIG through the wireless interface. After IFDIG analyzes the received data, it extracts the downlink data and performs heavy encapsulation according to the field device communication protocol, and finally sends the data packet to the field device. Field devices parse the received data packets and perform corresponding operations. If it is necessary to return information, it is completed through the uplink operation. The invention integrates the industrial field equipment into the mobile terminal, which can reduce the cost of equipment integration, enhance the flexibility of integration, and improve the adaptability of integration.

Description

A Mobility Integration Method for Industrial Field Devices

technical field

The invention belongs to the integration technology of industrial control network equipment, in particular to a method for integrating industrial field equipment into a mobile terminal.

Background technique

With the rapid development of information technology, industrial field equipment is rapidly developing in the direction of digitization, networking, and intelligence. The wider the application. However, due to the lack of corresponding field device system integration technology and specifications as support, it is difficult for digital and intelligent field devices to achieve complete information integration with existing control systems in industrial production. Many devices are still used in accordance with traditional analog devices. It can give full play to its due function blocks, parameterization, fault diagnosis, maintenance management and other intelligent functions. In order to seamlessly integrate various industrial digital field devices into the industrial control system and give full play to the advanced functions and advantages of digital field devices, it is necessary to provide support from device integration technology.

To this end, the International Electrotechnical Commission (IEC) has successively formulated two technical standards for field device integration, Electronic Device Description Technology (EDDL) and Field Device Tool (FDT). These two technologies and standards have their own advantages and disadvantages and are supported by different manufacturers, but they still cannot completely solve the bottleneck problem of system integration of field devices. EDDL adopts the device description technology of interactive language, and provides the semantics or description of field device data parameters to the control system through the device description file. The system analyzes the description file, so that the system can perform various operations such as data exchange, equipment configuration, and fault diagnosis on the field equipment. FDT provides a device integration technology similar to a general-purpose driver. The device provider provides the device type manager (DTM) component of the device. The user can load each DTM through the framework application to realize the information integration of the field device. Device management, maintenance and diagnosis.

These two technologies do not consider mobility as a main factor, especially do not provide support for current mainstream mobile terminals, such as smart phones and tablet computers. In response to this situation, a field device integration technology that supports mobility is needed to integrate various industrial field instruments into mobile terminals, so as to improve system flexibility and facilitate parameter configuration, diagnosis and maintenance at the industrial field.

Contents of the invention

The purpose of the present invention is to provide a mobility integration method for industrial field devices that integrates industrial field devices into mobile terminals, which can reduce the cost of device integration, enhance the flexibility of integration, and improve the adaptability of integration.

In order to achieve the above purpose, the following technical solutions are adopted:

A mobility integration method for industrial field equipment, characterized in that:

The integration method includes uplink operation and downlink operation, wherein

Uplink operation steps:

①IFDIG (Industrial Field Device Integration Gateway) communicates with industrial field devices with digital interfaces. These digital communication interfaces are interfaces based on existing protocols of RS232, RS485, USB or ETHERNET. Corresponding protocol support should be provided to communicate with devices. data exchange;

②IFDIG analyzes according to the protocol and extracts the process data of the field equipment;

③IFDIG re-encapsulates the obtained process data to form an IFDCP data packet;

④IFDIG uses Bluetooth or WIFI wireless transmission protocol to send IFDCP data packets to the mobile terminal;

⑤The mobile terminal analyzes the received IFDCP data packet to obtain the process data of the field equipment;

⑥ The host application in the mobile terminal presents the process data in the form of a table;

⑦The user performs parameterization, diagnosis and maintenance operations on the interface provided;

2) Downstream operation steps:

①The user sends the downlink data through the mobile terminal through the HA interface;

②HA seals and forwards the downlink data according to IFDCP to form a protocol data packet;

③HA uses Bluetooth and WIFI protocols to transmit data packets to IFDIG through the wireless interface of the mobile terminal;

④ IFDIG analyzes the received data packets and recovers the downlink data;

⑤IFDIG re-encapsulates the downlink data according to the protocol used by the field device to form a new data packet, and transmits the data packet to the field device through the communication interface provided by the gateway;

⑥The field device analyzes the received data packets, recovers the downlink data, and performs corresponding processing;

⑦ If necessary, pass the processing result through the upstream steps and return the result to the user.

The format of the IFDIG data packet is: frame identification field, command number/response number field, device address field, variable number field, variable type field, variable value length field, variable value field, and check code field.

The format of the configuration file in the industrial field device is XML.

The invention is an important supplement to the existing method and provides a new approach for the integration of industrial control systems. Mobile terminals such as smart phones and tablet computers have the advantages of strong functions, good flexibility, high cost performance, and convenient operation. The use in industrial control is conducive to enhancing the flexibility and scalability of the control system. The invention is beneficial to connect the industrial control with the mobile terminal, facilitates the establishment of communication between the field equipment and the mobile terminal, and is convenient for users to perform operations such as parameterization, diagnosis and maintenance on the field equipment through the mobile terminal.

Description of drawings

Fig. 1 Mobile integration structure diagram of industrial field equipment;

Fig. 2 Structure diagram of industrial field equipment communication protocol data frame;

Figure 3 Schematic diagram of the specific implementation of equipment integration;

Figure 4 is a schematic diagram of the specific implementation of device integration.

Detailed ways

The method of the present invention will be described in further detail below in conjunction with the accompanying drawings, and these descriptions should not be construed as limiting the present invention.

The main integrated objects of the present invention are industrial field devices. The main body of the integration is a mobile terminal, rather than a traditional computer or hand-held operator. The device configuration files used for integration are based on open XML files rather than traditional proprietary files. The communication protocol used by the mobile terminal and the industrial field device integration gateway is the field device communication protocol of the same industry, and the wireless communication method is adopted instead of the wired communication method of the traditional industrial control network. This method of mobility integration of industrial field devices includes two stages of uplink and downlink operations.

The invention divides the mobility integration method of industrial field equipment into operations in two directions, downlink and uplink.

For the uplink operation, first design the Industrial Field Device Integration Gateway (IFDIG, Industrial Field Device Integration Gateway). IFDIG supports the communication protocols commonly used in industrial field devices, and analyzes and understands the protocol data packets; secondly, IFDIG supports the industrial field device communication protocol (IFDCP, Industrial Filed Device Communication Protocol), repackages the data from the industrial field, and passes Bluetooth, WIFI and other wireless interfaces communicate with the mobile terminal. Finally, the host application (HA, Host Application) running in the mobile terminal parses the content of the received IFDCP packet, and finally presents various parameters of the device in the form of a table. Users can operate through these parameters to complete parameterization, diagnosis and maintenance.

For the downlink operation, if the user generates downlink data after the operation, the HA will encapsulate it to generate an IFDCP data packet, and then send it to the IFDIG through the wireless interface. After IFDIG analyzes the received data, it extracts the downlink data and performs heavy encapsulation according to the field device communication protocol, and finally sends the data packet to the field device. Field devices parse the received data packets and perform corresponding operations. If it is necessary to return information, it is completed through the uplink operation.

IFDCP abstracts various data of field devices into variables, and both upstream and downstream data are described as variable values. The fields included in the IFDCP frame are: frame identification 8 bits, command number/response number 8 bits, device address 8 bits, variable number 16 bits, variable type 8 bits, variable value length 16 bits, variable The value is greater than or equal to 0 bits, and the check code is 16 bits. Use the CRC check code whose generated code is 0x11021.

When HA understands data packets, it needs to use the configuration file of the device. The present invention adopts the configuration method based on XML, because various platforms of XML are universal, and the portability is good; a tree-like hierarchical structure is provided, and a certain element can be easily located; the application program is easy to process XML files; the XML file provides a Concise self-explanatory notation, easy to read and understand. Mainly describe each variable of the field device, including the address of the device where the variable is located, the variable number, the type of the variable, the length of the variable value, the range of the variable, the unit of the variable, and the description of the variable, etc. The mobile terminal can understand various variables through the device configuration file and form a user operation interface.

Specifically, as shown in Fig. 1 to Fig. 4, the specific embodiment schematically shows that the system consists of three parts: a temperature transmitter with an RS232 interface, an industrial field device integration gateway IFDIG, and a mobile phone with an Android system. The operation steps are as follows.

1) In order to understand the various parameters in the temperature transmitter, HA needs to import the XML device configuration file "CfgFile.xml" first, and perform initialization operations;

2) HA parses the configuration file and generates a table-based operation interface;

3) The user issues commands through the operation interface through HA, for example: read the current temperature value of the temperature transmitter whose address is 0x29;

4) HA encapsulates the downlink data into IFDCP packets:

5) HA sends the downlink data packet to IFDIG through the Bluetooth interface;

6) IFDIG parses the data packet;

7) IFDIG seals and forwards the data according to the field device protocol;

8) IFDIG sends the encapsulated data to the field device;

9) The field device parses the data packet and reads the current temperature value;

10) The field device encapsulates the temperature value of 82.25 degrees Celsius according to the communication protocol;

11) The field device sends the data to IFDIG through the RS232 interface;

12) IFDIG analyzes and recovers the uplink data;

13) IFDIG is re-encapsulated according to the IFDCP protocol;

14) IFDIG sends the IFDCP packet to HA through the Bluetooth interface;

15) HA parses according to the configuration file;

16) HA presents the analysis result to the user in the form of a table.

Explanation of related technical terms

Industrial Field Device Integration Gateway (IFDIG, Industrial Field Device Integration Gateway): IFDIG is a hardware device that supports common communication protocols for industrial field devices and has wireless interfaces such as Bluetooth and WIFI. IFDIG can communicate with industrial field devices and analyze and understand protocol data packets. It is also possible to use the industrial field device communication protocol IFDCP to communicate with the mobile terminal.

Industrial Field Device Communication Protocol (IFDCP, Industrial Filed Device Communication Protocol): IFDCP is a protocol for communication between IFDIG and mobile terminals. It belongs to the application layer protocol and is built on the physical layer and data link layer of wireless protocols such as Bluetooth and WIFI. It abstracts various data of field devices into variables, and both upstream and downstream data are described as variable values. The fields included in the data frame are: frame identification 8 bits, command number/response number 8 bits, device address 8 bits, variable number 16 bits, variable type 8 bits, variable value length 16 bits, variable The value is greater than or equal to 0 bits, and the check code is 16 bits. Use the CRC check code whose generated code is 0x11021.

Host Application (HA, Host Application): HA is an application program that runs on a mobile terminal and is used to integrate industrial field devices. It can analyze the content of the received IFDCP data packet, and finally present various parameters of the device in the form of a table. Users can operate through these parameters to complete parameterization, diagnosis and maintenance. At the same time, the user's operation data is sent to IFDIG.

XML: Extensible Markup Language (Extensible Markup Language), a markup language used to mark electronic files to make them structural, can be used to mark data, define data types, and is a source that allows users to define their own markup languages language.

WIFI: WIFI is a technology that can connect terminals such as personal computers and handheld devices (such as PDAs and mobile phones) to each other in a wireless manner. WIFI is a brand of wireless network communication technology, owned by WIFI Alliance. The purpose is to improve the interoperability between wireless network products based on the IEEE 802.11 standard.

Bluetooth: Bluetooth is a radio technology that enables devices to communicate over short distances. It can carry out wireless information exchange between many devices including mobile phones, PDAs, wireless headsets, notebook computers, and related peripherals. The use of "Bluetooth" technology can effectively simplify the communication between mobile communication terminal equipment, and can also successfully simplify the communication between equipment and the Internet, so that data transmission becomes faster and more efficient, and broadens the road for wireless communication. Bluetooth adopts a decentralized network structure, fast frequency hopping and short packet technology, supports point-to-point and point-to-multipoint communication, and works in the globally common 2.4GHz ISM (ie industrial, scientific, medical) frequency band.

Claims (3)

1. a mobility integrated approach for industrial field device, is characterized in that:

Described integrated approach comprises upstream operation and downstream operation, wherein

Upstream operation step:

1. industrial field device integrated gateway IFDIG communicates with the industrial field device with digital interface, these digital interfaces are the interface based on RS232, RS485, USB or ETHERNET existing protocol, IFDIG provides corresponding agreement support, to carry out exchanges data with industrial field device;

2. IFDIG resolves according to agreement, extracts the process data of industrial field device;

3. IFDIG encapsulates the process data obtained again, forms IFDCP packet;

4. IFDIG uses bluetooth or WIFI wireless transmission protocol, by IFDCP Packet Generation to mobile terminal;

5. mobile terminal is resolved the IFDCP packet received, and obtains the process data of industrial field device;

The form of process data according to form presents by the host application 6. in mobile terminal;

7. user is at the enterprising line parameter in the interface provided, diagnosis, attended operation;

Downstream operation step:

1. user is by HA interface, is sent by downlink data by mobile terminal;

2. downlink data encapsulates according to IFDCP by HA, forms protocol data bag;

3. HA uses bluetooth or WIFI agreement, by the wave point of mobile terminal, protocol data bag is transferred to IFDIG;

4. the protocol data bag received is resolved by IFDIG, recovers downlink data;

5. the agreement that uses according to industrial field device of IFDIG, again encapsulates downlink data, forms new packet, and by the communication interface that gateway provides, by new data packets to industrial field device;

6. industrial field device is resolved the new packet received, and recovers downlink data, and processes accordingly.

2. the mobility integrated approach of industrial field device as claimed in claim 1, is characterized in that: the form of IFDIG packet is: length field, the variable codomain of frame identification territory, command number/response territory, device address domain, variable territory, types of variables territory, variate-value and verify code domain.

3. the mobility integrated approach of industrial field device as claimed in claim 1 or 2, is characterized in that: the form of the configuration file in described industrial field device is XML.