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Modbus Gateway
(Modbus TCP / Modbus RTU/ASCII)
ENB-302MT

User Manual

REV 2.3
SiboTech Automation Co., Ltd
Technical Support: 021-5102 8348
E-mail: support@sibotech.net

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Summary of Contents for SiboTech ENB-302MT

  • Page 1: User Manual

    Modbus Gateway (Modbus TCP / Modbus RTU/ASCII) ENB-302MT User Manual REV 2.3 SiboTech Automation Co., Ltd Technical Support: 021-5102 8348 E-mail: support@sibotech.net...
  • Page 2: Table Of Contents

    5.1 Ethernet master communicate with multiple serial slaves ................. 26 5.2 Serial master communicate with multiple Ethernet slaves ................ 27 5.3 Serial master communicate with serial slave through Ethernet ..............27 6 Installation ................................28 6.1 Mechanical Dimensions ..........................28 6.2 Installation ..............................28 www.sibotech.net...
  • Page 3: About This Document

    For further information, documentation etc., please visit the SiboTech website: http://www.sibotech.net/En/ 1.2 Important user information The data and examples in this document can not be copied without authorization. Sibotech maybe upgrades the product without notifying users. is the registered trade mark of SiboTech Automation Co., Ltd.
  • Page 4: Technical Specifications

    [7] Two independent RS485 interfaces or RS232 interfaces 1KV optical isolation; [8] Power supply: 24VDC (11V ~ 30V), 90mA (24VDC); [9] Working temperature: -20 ℃ ~ 60 ℃, relative humidity: 5% ~ 95% (no condensation); [10] Dimensions: 40mm (Width) *125mm (Height) *110mm (Depth); www.sibotech.net...
  • Page 5: Attention

    To prevent water, water module will affect the normal work;  Please check the wiring, before any wrong or short circuit. 2.5 Related products Related products include: ENB-302MI, ENB-302M and so on. http://www.sibotech.net/En/ More information about these products, please visit: , or dial technical support line: +86-21-5102 8348 www.sibotech.net...
  • Page 6: Hardware Description

    Red flashing (3 Modbus TCP connection are disconnected seconds) Always green Serial port ready to send and receive data Red flashing Automatic routing conflict Light at one time Start status ENS (Orange) and SNS (Orange) Flash alternately Configuration mode www.sibotech.net...
  • Page 7: Configuration Switches

    Note: Restart ENB-302MT after resetting the configuration and the configuration can take effect! 3.4 Interface 3.4.1 Power interface ENB-302MT has two power interfaces, with power redundancy function, when one the way to power failure, power can continue to supply the other way. 24V+...
  • Page 8: Ethernet Interface

    Power supply wiring as shown below: 24V+ 24V+ DC power: +24V Ⅰ Power interface of ENB-302MI Must be connected 24V+ 24V+ DC power: +24V Ⅱ Power interface of ENB-302MI (the other) Optionally be connected 3.4.2 Ethernet interface Ethernet interface apply RJ-45 connector, 10/100M adaptive. www.sibotech.net...
  • Page 9: Rs-232/Rs-485 Interface

    RS232 interface: Signal Description TX, connect with RX of user device RX, connect with TX of user device RS485 interface: Signal Description B+,RS485 A-,RS485 The RS-485 interface of ENB-302MT is standard, and the RS-485 characteristics of the product are shown www.sibotech.net...
  • Page 10 ②Subsection can be connected up to 32 sites; ③The farthest end of each bus has a termination resistor—120Ω 1/2W to ensure reliable operation of the network. 485+ 485- RS485 device RS485 interface 485+ ENB-302MT 485- RS485 device 485+ 485- RS485 device www.sibotech.net...
  • Page 11: Instructions Of Configuration Software

    ENB-302MT! Note: The factory set of ENB-302MT is DHCP, if the network is no DHCP Server, you can set mode bit (bit 1) to 1(On), and restart ENB-302MT, then the fixed IP address of ENB-302MT is 192.168.0.10, mask is 255.255.255.0, gateway address is 192.168.0.1.
  • Page 12: Search All Equipments Of Ethernet

    The software provides two ways to search the gateway for the user. 4.2.1 Search all equipments of Ethernet Click “Search equipment” button of the main interface, the software will search all of the available ENB-302MT equipments and list them in the main interface. www.sibotech.net...
  • Page 13: Ip Search

    Click “IP search” button of the main interface will pop up a dialog box, and user need enter the IP address of ENB-302MT. After entering the correct IP address, the software will search ENB-302MT with the IP address in the network, and list the information of the equipment in the main interface.
  • Page 14 Click “Configuration” button, a password authentication dialog box will pop up if the equipment has been set with a password: Pass the password authentication or no password and then enter configuration interface: www.sibotech.net...
  • Page 15: Operating Modes

    4.3.1 Operating Modes ENB-302MT provides two operating modes: Modbus RTU slave mode----Modbus TCP master communicate with Modbus RTU slave through the gateway; Modbus RTU master mode----Modbus TCP salve communicate with Modbus RTU master through the gateway. The other two modes: “ASCⅡ salve mode” and “ASCⅡ master mode” will open in a future release.
  • Page 16: Serial Parameters

    0.0.0.0 (currently only support 0.0.0.0) —— DNS2 0.0.0.0 (currently only support 0.0.0.0) Note: The name can not have spaces, up to 20 characters, it is best not to use Chinese. 4.3.3 Serial parameters Serial parameters include: “Baud rate”, “Parity”, “Stop bits”, “Data bits”. www.sibotech.net...
  • Page 17: Id Mapping

    8 (currently only support 8 data bits) 4.3.4 ID mapping Specify request packets send to which serial port or send to which server. —— Virtual slave ID range Ether an ID range, the left is minimum, the right is maximum (not more than 247); www.sibotech.net...
  • Page 18: Modbus Parameters

    Tip: 1. “Add” and “Modify” button both have “Set” function, users do not need to click “Set” then click “Add” or “Modify”. 2. Support up to 36 messages. 4.3.5 Modbus parameters Set “Character time out”, “Response time out” and “Delay between polls” of Modbus RTU in the follow interface: www.sibotech.net...
  • Page 19: Priority Control

    Comply with specified the main master, and comply with specified the request High Comply with specified the main master, or comply with specified the request Not comply with priority conditions Use method of “Add”, “Modify” and “Delete” button in the interface is the same with “ID mapping” interface. www.sibotech.net...
  • Page 20: Advanced Parameters

    If users want to delete the password, just put your password is set to empty. —— When user click “Default value”, the previous configuration information will Default value be lost. —— When a TCP connection idle time reaches the set Idle time of TCP connection and Keep-Alive www.sibotech.net...
  • Page 21: Locate

    “Cancel” button. 4.4 Locate When the user manage multiple ENB-302MT, you can use “Locate” function determine equipment that you want to configure。 Users click on the “Locate”, and the equipment is in Ethernet, the orange light of the equipment will flash 3 seconds then the user can find it.
  • Page 22: Import/Export

    4.6 Import/Export —— Import Import the parameters (txt) to the software; —— Export Save the parameters to the local computer. www.sibotech.net...
  • Page 23 Note: When the parameters are saved into a txt document, you can change the data of the document, but please ensure the accuracy of the data, or incorrect data will be handled in accordance with the default value. Do not change the keywords and do not add address. www.sibotech.net...
  • Page 24: Communication Test

    4.7 Communication test “Communication test” can manually send Modbus TCP request to test serial devices. Click “Communication test” button and it will pop-up the follow interface: www.sibotech.net...
  • Page 25 IP address The IP address of ENB-302MT to be connected; —— Port The port of ENB-302MT to be connected, and the default is 502; —— Support function code: “1”, “2”, “3”, “4”, “5”, “6” , “15”and “16”; Function code ——...
  • Page 26: Typical Application

    5 Typical Application ENB-302MT can connect Modbus master/slave devices to Ethernet. ENB-302MT is a bridge in the communication, and completes the conversation of Modbus TCP and Modbus RTU/ASCII. The following is some typical application of ENB-302MT. 5.1 Ethernet master communicate with multiple serial slaves...
  • Page 27: Serial Master Communicate With Multiple Ethernet Slaves

    5.2 Serial master communicate with multiple Ethernet slaves RTU/ASCII Master RS-485 ENB-302MT EtherNet TCP Slave TCP Slave 5.3 Serial master communicate with serial slave through Ethernet Serial devices communicate via Ethernet can extend the transmission distance. RTU/ A SCII Master...
  • Page 28: Installation

    6 Installation 6.1 Mechanical Dimensions Size: 40mm (Width)*125mm (Height)*110mm (Depth) 6.2 Installation 35mm DIN rail mounting www.sibotech.net...
  • Page 29 www.sibotech.net...

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