TW589538B - Distributed field tool data accessing method - Google Patents

Abstract

The present invention provides a distributed field tool data accessing method, which includes the following steps: connecting the upper level computer with several network controllers through local area network, and the network controller has a control network port connecting with the field tools; the upper level computer can execute a configuration software for configure the connected network controllers and field tools as a virtual tool data server for continuously conducting the data accessing, updating and storing for the connected tools, and the network controllers provides a standard industrial local area network protocol for the connection of tool data and the application executing in the upper level computer; and, the virtual tool data server configured with the above-mentioned method required in the field can establish the distributed field tool data accessing system in real-time reaction.

Description

589538

______ 一千 p \ V. Description of the invention (1) [Technical field] The present invention particularly provides a method for accessing decentralized field device data, which is used to solve the network that is encountered when collecting field device data. Interface, connection indefiniteness, data form, data packet, device driver, application program interface software, and system integration issues such as system scalability and real-time. [Previous technology] Press 'On a traditional remote monitoring system, a variety of field devices are connected to the monitoring host 1 (such as Figure 1) at a low-speed RS232 or RS485 serial port.' This monitoring host 1 is required In its operating system environment, different device drivers are set up and connected to the field device 2 with a master-slave architecture. 'Only when the monitoring host 1 issues an instruction, the data collection of the field device 2 is performed. . Furthermore, due to the limitation of RS232 or "485 connection distance and transmission speed, its response time to field device connection range and data collection is limited; with the advancement of technology, high-speed local area networks are widely used in field device monitoring systems. Please refer to Figure 2. The monitoring host 3 is connected to a network controller 4 with a network protocol conversion via a local network. The network controller 4 is connected to RS 2 3 2 or RS 4 8 5 The serial interface is connected to the field device 5. Since the network controller 4 only provides the conversion of the network protocol, this monitoring knows that the host 3 needs to set different device drivers in its operating system environment, and uses a master-slave type Architecture, connecting to the field device 5, the execution of the data collection of the field device 5 must be performed after the host 3 of the monitoring end gives an instruction, and the response time of the data collection is also affected by the network controller 4 and the field device 5. RS 232 or RS4 85 serial connection is limited by low-speed transmission. Furthermore, in the system expansion, the restrictions of the monitoring host must be considered, and

Page 6; 8953 ^ -Π! V. Description of the invention (2) ί The obstacles; therefore, in the existing remote monitoring system currently = heterogeneity of the same rights, decentralization of equipment connections, and instant response of the system, etc. [ SUMMARY OF THE INVENTION [Exemplary method I]: The main purpose is to provide a decentralized field device data storage: Ϊ several = 网路 network link upper computer and several network control i # ~ industrial equipment and has a control network port When connecting with field equipment, if the women's clothing is installed, the upper computer can execute and configure the software. Its prepared ^^ ^ 4 can be used to connect the upper computer, network controller and field equipment to the wiring arrangement and related software and hardware. Parameter group separation " such as upper computer name / IP, network card approval ~, and debugging include connection card, computer controller name / IP, connection serial port, connection exclamation Model, equipment identification code, data early controller data temporary storage area, data length, ,,, and the same channel parameter configuration settings, after each far company & f number of people, Time —out time, etc., group away from private riding & field Network controller configuration and debugging is completed. The software is based on the parameters set. A download to the controller via the network LAN. This type of tragedy case contains network protocol conversion, connection device driving, and mode file interpretation software, and retrieves / updates the contents of the month ^ ， to store the data of the connected device in real time. Tongan 2 works 'to form a virtual device data feeder; at ΐ = when used', such as with the upper computer's man-machine in a standard local network recitation ^ end " network controller and provide-industrial application link. Connect the required network controller and connection via the above method ::::::: device data and application program Page 7 589538 V. Field device program of invention description (3) to direct access Virtual storage of field-set information, due to the determination of the upper-level telecommunications protocol link load and system-type field equipment

Set up as a virtual device data server. When the network controller is used, the upper-level computer is prepared and the data is stored in the server temporary storage area, so that the upper-level computer can quickly use the industry-standard regional brain application system for the network controller. Just provide this industrial standard program and LAN interface, simplifying the restrictions' to construct an expandable and data-accessible system. When the upper layer is continuously obtaining the local area network standard within the local area, the upper layer of the real-time anti-computer application of the local network update, the storage of device communication, and the integration of the local network and the brain should be decentralized to make your reviewing committee have a better understanding of the invention. For further in-depth understanding, a preferred embodiment will be exemplified, and illustrated in conjunction with the figure as follows: Please refer to FIG. 3, the present invention is to connect the upper computer 10 and several network controllers with an Ethernet LAN ii Each network controller 1 i has a control network port such as RS-232 to connect to each field device (pLC) 12, among which, the upper computer 10 is a PC / PIII or higher and a Windows 95 or higher operation system. When the system is installed, the configuration software is executed, which has a graphical interface / surface, which can simulate the connection arrangement of the upper computer 10, the network controller 11 and the field devices 12 as shown in Figure 3 on the day. And click each relevant image to set its configuration parameters and debugging. After completing the configuration and debugging of a connected network controller 1 1, the narrative of this network controller 11 is generated. Configuration file, the content of this file is used to describe the settings State parameters and actions are downloaded to the connected network controller ii via the local area network; the following example is a network controller 丨 丨 COM1-RS232 connection 〇MR〇N-C2〇 PLC reads DM0 ~ 24 data And stored in

589538 V. Description of the invention (4) Network controller 1 1 The narrative configuration file generated when the parameter configuration of the data temporary storage area 1 is set.

Contents of the file! ---- AUTO C0M1, 9 6 0 0, 7, E, 2, 1〇〇, 1! ==== [HOST—LINK] (C0M1—RS232—OMRON—C200) Model COMMAND = READ ID = 〇LENGTH = 25 PLC—START = 0 LINKLIST—START

Content Description File Header Set AUTO mode C0M1 Parametres Set COMMAND Header Procedure Name Block Name, COM No. and PLC 00 0 1 [END] READ PLC DM PLC ID NO. 0 READ DM LENGTH 25 DM READ START ADDRESS 〇 Network controller data Temporary storage area 1 Block End Procedure End COMMAND End This slot is downloaded to the corresponding network controller by the group software. Network controller 11 contains network protocol conversion, connection device driver and configuration. The file interpretation software starts to interpret the settings of the execution file, and continuously reads and updates the DM0 ~ 24 data of the connected 0MRON_C20〇PLC and stores it in the network controller 11 data temporary storage area i. This network The controller is the virtual equipment data server of OMRON — C200 PLC which forms a connection.

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The network controller 11 provides an industry standard local area network communication protocol (such as Modbus / TCP) to connect the accessed device data with the application program of the upper-level computer 10, such as monitoring software systems such as In-Touch or i-Fix. These applications execute the included Modbus / TCP communication protocol linking program and data label name definition program to link the device data of the network controller 丨 丨 to the monitoring software system and other applications such as the upper-level computer 10. Fig. 4 illustrates the operation flow of the present invention, and Fig. 5 is a schematic diagram of the field equipment data access of the present invention. The access steps of the present invention are performed before the upper-layer computer, and the configuration software for women's debugging is executed, and then based on the model of the connected field device, the communication connection parameters, and the data access location / length. , Identification code, re-access times, time-out time and other on-site actual settings, set in the configuration software, and generate a narrative configuration file, downloaded to the set network controller via the local network 1 1 The network controller executes configuration file interpretation software, collects data after interpreting the content of the configuration file, and can perform connection monitoring of the software through the upper computer to debug configuration parameter settings. Correction: if there is an error, re-execute the previous steps, if the network controller 11 is correct, the required virtual device data server is formed. At the time of application, the application is connected to the upper-layer computer 10 application program using a standard LAN protocol. The method provided by the present invention includes configuration software and a network controller to perform the functions of a virtual device data server and related operation processes, so that various different equipments on site can be set to a common connection communication protocol and data format. Virtual machines, applications of upper-level computers and access to such virtual machines' data through high-speed LANs. This method simplifies field equipment

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I is replacing 5. Description of the invention (6) The integration of heterogeneous different devices and connected networks in the material access application system improves the real-time response of the system data and the scalability of the system. BB1 Page 11 589538 93 · 3, 4 Schematic description of the diagram Figure 1: System diagram of habitual (1) remote monitoring. Figure 2: Schematic diagram of the habitual (II) remote monitoring architecture. Figure 3: Schematic diagram of the present invention. FIG. 4 is a flowchart of the present invention. FIG. 5 is a schematic diagram of data access of a field device according to the present invention. Component description Practice part: 1: Monitoring host 2: Field device 3: Monitoring host 4: Network controller 5: Field device

Part of the invention: I 0: upper computer-configuration software virtual device data server II: network controller-network protocol conversion, device driver, configuration file interpretation software, industry standard local area network communication Agreement 12: Field Equipment

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Claims (1)

589538 1. A distributed field device data access method, which uses a local network to connect an upper-level computer and several network controllers, and the several network controllers have a control network interface to connect with the field devices, among which; a · —The configuration software has a graphical interface, which is executed on the upper-level computer to configure the connection parameter configuration settings required for accessing the data of this field device, and generate a narrative configuration file. It describes the configuration settings and data access actions, which can be downloaded to the set network controller; b. The network controller contains the conversion of network protocol, the driver of the connected field device and the interpretation of the configuration file Software that can interpret and execute the downloaded configuration content to perform the access, update and storage of connected field device data, and the network controller and the "on-site field speech" to form a virtual equipment information network. The communication protocol enables the server to execute applications. The c. Network controller has an industry-standard upper-layer computer application and virtual device data. Decentralized field device data access as described in item i of the scope 2 In the method, the software executed by the upper-level computer has a graphical interface for the connection arrangement of the upper-level computer, the network controller and the field equipment, and can directly click each phase on the simulation screen to set its software and hardware. Configuration parameters and debugging. 58938 After that, it can be converted into a narrative configuration file, which is used to describe the configuration parameters and data access actions. Take the data storage area of the decentralized field device described in the first patent application scope, where the network controller has a local network and control network interface-based simulation ^ Network protocol conversion and control network The driver of the connected device runs an attached program of the configuration file interpretation software. 5 parties apply for the decentralized field device data access described in item 1 of the patent scope > fez, where the network controller starts after the configuration file download is complete Connect the field equipment information department! F Γ fetch, update, and save the work, so that the virtual field device data server will continue to automatically update the accessed device data. 6 = The decentralized field device data access method described in item 1 of the patent scope ^ Among them, the industry standard LAN communication protocol of the network controller is suitable for connecting with various upper-layer computer application system environments. — —