• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    TC2016 communications module for ModBus connections Maestro-Esclavo is a device that acts as a ModBus gateway between equipment within the same installation, communicating incompatible a priori equipment (TCP communication - RTU communications) or expanding the number of connections of the server/slave device. It is able to provide the status of the server/slave alarm and to provide 8 analog signals 0/20ma-4/20ma. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2717336A1
    申请号:ES201700805
    申请日:2017-12-20
    公开日:2019-06-20
    发明作者:Salcedo Javier Royo
    申请人:Telecontrol Instr Aplicada S L；
    IPC主号:
    专利说明:

    [0001] TC2016 Communications Module for ModBus Master-Slave connections.
    [0002] Sector of the technique
    [0003] The following invention belongs to the field of industrial communications.
    [0004] The main object of the invention is a device that acts as a gateway between ModBus devices, expanding the amount and type of communications that Modbus servers / slaves have.
    [0005] BACKGROUND OF THE INVENTION
    [0006] ModBus is a communications protocol located at level 7 of the OSI Model, based on the master / slave architecture (RTU) or client / server (TCP / IP), designed in 1979 by Modicon for its range of programmable logic controllers (PLCs) . Developed into a de facto standard communications protocol in the industry, it is the one with the greatest availability for the connection of industrial electronic devices. The reasons why the use of ModBus is superior to other communication protocols are:
    [0007] 1. It is public
    [0008] 2. Its implementation is easy and requires little development
    [0009] 3. Handles blocks of data without assuming restrictions
    [0010] ModBus allows the control of a network of devices, for example a temperature and humidity measurement system, and communicate the results to a computer. ModBus is also used for the connection of a supervisory computer with a remote unit (RTU) in data acquisition supervision systems (SCADA). There are versions of the ModBus protocol for serial and Ethernet port (ModBus / TCP).
    [0011] There are two variants, with different numerical representations of the data and slightly unequal protocol details. ModBus RTU is a compact binary representation of the data. ModBus ASCII is a readable representation of the protocol, but less efficient. Both implementations of the protocol are series. The RTU format ends the frame with a cyclic redundancy control sum (CRC), while the ASCII format uses a longitudinal redundancy control sum (LRC). The ModBus / TCP version is very similar to the RTU format, but establishing transmission through TCP / IP packets (system port 502, identifier asa- appl-pmto).
    [0012] The problem at the moment is that RTU slaves can not communicate with TCP clients and vice versa, making it very expensive to update the technology or maintain current technology, forcing obsolete equipment to be maintained due to the impossibility of updating existing installations.
    [0013] On the other hand, ModBus slaves have a limited number of communication ports, limiting the number of ModBus Masters that can interrogate that slave,
    [0014] Explanation of the invention
    [0015]
    [0016] The TC2016 Communication Module for ModBus Master-Slave connections, is designed to be inserted in a 19 "rack cabinet, it has 6 DB-9 ports, 3 RJ-45 ports and 8 analog outputs.
    [0017]
    [0018] The concept of design, apart from expanding the communications ports of the system, is to act as a communications gateway between Master-Slave equipment, allowing communication between them, even if they were incompatible a priori, since right now an RTU slave can not be communicate with a TCP Master and vice versa.
    [0019]
    [0020] The TC2016 Communications Module for ModBus Master-Slave connections is capable of communicating 4 serial masters at different speeds with a TCP server, while maintaining TCP communication with other TCP clients.
    [0021]
    [0022] The TC2016 Communications Module for ModBus Master-Slave connections allows to communicate up to 4 TCP clients and three serial masters at different speeds with a serial slave, at the same time.
    [0023]
    [0024] It is capable of providing a ModBus TCP communication through another configurable port other than 502, since in some industrial facilities communications through this port can become a problem.
    [0025]
    [0026] It channels two serial ports of the ModBus TCP slave, if any.
    [0027]
    [0028] Provides 8 configurable, galvanically isolated, 0-20 mA or 4-20 mA analog signals previously configured in the ModBus slave.
    [0029]
    [0030] It has a potential free contact called Globalized Alarm that collects any malfunction programmed in the slave equipment.
    [0031]
    [0032] In the following table we can see the different combinations of communications allowed with the TC2016 communications module.
    [0033]
    [0034] Supported communications between Master and Slave
    [0035]
    [0036]
    [0037]
    [0038]
    [0039] This table is expanded by entering the variable of serial port speeds for master / slave and with TCP ports in case of master / slave TCP. A maximum of 4 TCP master connections connected to the slave port of the TC2016 module are supported.
    [0040] BRIEF DESCRIPTION OF THE DRAWINGS
    [0041]
    [0042] To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization thereof, a set of figures is included as an integral part of said description. where, with illustrative and non-limiting character, the following has been represented:
    [0043]
    [0044] Figure 1.- Shows the front view of the Communications Module TC2016. Where you can see two lights Green on, Red Alarm and a RJ-45 connector very useful for maintenance.
    [0045]
    [0046] Figure 2.- Shows the rear view of the Communications Module TC2016. Where you see the four serial ports (P1, P2, P3 and P4), two RJ-45 connectors (ETH1 and ETH2), the ports that we channel from the slave (Com1 and Com2), the digital output in connector J1 and the outputs analog in J0 connectors.
    [0047]
    [0048] Figure 3.- Shows the internal view of Communications Module TC2016. Where you can see the different components of which it is composed. The ABB PM573ETH PLC, the CM574-RS serial port coupler, the AO523 analog signal module, the DO571 digital signal module, the EDS205 ethernet communications switch, the CT-MVS22S timed relay, the contact relay 40.31 and the Galvanic insulators CC-E I / I-2.
    [0049]
    [0050] PREFERRED EMBODIMENT OF THE INVENTION
    [0051]
    [0052] In view of the mentioned figures, an example of a preferred embodiment of the invention can be observed, which comprises the parts and elements that are indicated and described in detail below.
    [0053]
    [0054] Thus, as seen in Figures 1 to 3, a possible preferred embodiment of the TC2016 Communications Module in question, essentially comprises the following elements:
    [0055]
    [0056] • Metal enclosure to be inserted in a RACK 19 "cabinet.
    [0057]
    [0058] • Mounting plate where the different internal elements that make up the TC2016 Communications Module will be arranged.
    [0059]
    [0060] • On the front, both 24VDC (Green) and active alarm (Red) lights.
    [0061]
    [0062] • Connector for 24Vdc voltage input, fuse holders and on / off switch.
    [0063]
    [0064] • Two male DB9 connectors Com1 and Com2 to receive the serial connections of the slave if there are any.
    [0065]
    [0066] • Two Female DB9 connectors Com1 and Com2 to send the signal of the slave in case of having those communications.
    [0067]
    [0068] • Four Female DB9 connectors P1, P2, P3 and P4, for ModBus Master / Slave connection.
    [0069] • Three RJ45 connectors for ModBus Master / Slave connections and TCP connections for maintenance.
    [0070] • Connector of 4 terminals J1 for the globalized alarm.
    [0071] • Two connectors of 8 JO terminals for the 8 analog signals.
    [0072] Internally TC2016 Communications Module is composed of:
    [0073] • Coupler of CM574-RS serial ports where Com2 is connected to port P1 and Com1 of CM574-RS is connected to port P2. These ports support both RS-232 communication as r S-485 communication.
    [0074] • The PM573 ETH PLC composed of two serial ports and one ethernet port, where Com1 is connected to P3 and Com2 is connected to P4. These ports, like the coupler ports, support both RS-232 communication and RS-485 communication. The Ethernet port is connected to the EDS 205 switch in order to transfer this signal to the different RJ-45 connectors (ETH1, ETH2 and ETH3) .
    [0075] • The AO 523 analog signal module that provides 8 0-20 mA or 4-20 mA analog signals connected to the galvanic isolators CC-E l / l-2 to provide isolated signals on analog signal J2 connectors
    [0076] • The module is digital signals DO571 that triggers the relay 40.31 and provides a potential free contact in the J1 globalized alarm connector.
    [0077] • Timed relay CT-MVS22S, the power intervenes restarting all internal components of TC2016 Communications Module
    权利要求:
    Claims (4)
    [1]
    1. TC2016 Communication Module for ModBus Master-Slave connections, characterized by 6 serial communication ports, 3 ETH communication ports, 4-terminal connector for alarm and two 8-terminal connectors for obtaining 8 analog outputs, designed as a gateway Communications between Master-Slave equipment.
    [2]
    2. TC2016 Communications Module for ModBus Master-Slave connections according to claim 1, allows communication between incompatible a priori equipment, allows to communicate an RTU slave with one or more (up to 4) TCP clients, while allowing communication with 3 RTU masters .
    [3]
    3. TC2016 Communications Module for Master-Slave ModBus connections according to claim 1, allows communication between incompatible a priori equipment, allows to communicate a TCP server with up to 4 RTU masters at different speeds, while allowing communication with 4 TCP clients as well.
    4. TC2016 Communications Module for ModBus Master-Slave connections according to claim 1, is able to provide communication to a TCP server with other TCP clients through a port other than standard 502 for ModBus communication.
    [4]
    4. TC2016 Communications Module for ModBus Master-Slave connections according to claim 1, allows to obtain 8 analog signals 0-20 mA or 4-20 mA previously configured in the slave or server.
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    同族专利:
    公开号 | 公开日
    ES2717336B2|2019-11-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN104394069A|2014-11-11|2015-03-04|东北大学|Micro-grid data gateway device and data converting method|
    CN205377930U|2015-12-14|2016-07-06|南京大全自动化科技有限公司|Be transformed into MODBUS stipulations from TCPIP link serial link's equipment|
    法律状态:
    2019-06-20| BA2A| Patent application published|Ref document number: 2717336 Country of ref document: ES Kind code of ref document: A1 Effective date: 20190620 |
    2019-11-05| FG2A| Definitive protection|Ref document number: 2717336 Country of ref document: ES Kind code of ref document: B2 Effective date: 20191105 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201700805A|ES2717336B2|2017-12-20|2017-12-20|TC2016 communications module for Modbus Master-Slave connections|ES201700805A| ES2717336B2|2017-12-20|2017-12-20|TC2016 communications module for Modbus Master-Slave connections|
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