Weidmüller IE-GW-MB-2TX-1RS232/485 Manual
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Weidmüller IE-GW-MB-2TX-1RS232/485 Manual

Modbus tcp / rtu gateway
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Modbus TCP / RTU Gateway
Manual
for models
IE-GW-MB-2TX-1RS232/485
IE-GWT-MB-2TX-1RS232/485
First Edition, May 2014
1536320000/00/05.14

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Summary of Contents for Weidmüller IE-GW-MB-2TX-1RS232/485

  • Page 1 Modbus TCP / RTU Gateway Manual for models IE-GW-MB-2TX-1RS232/485 IE-GWT-MB-2TX-1RS232/485 First Edition, May 2014 1536320000/00/05.14...
  • Page 2 Modbus TCP / RTU Gateway Manual IE-GW-MB-2TX-1RS232/485 IE-GWT-MB-2TX-1RS232/485 The software described in this manual is furnished under a license agreement and may be used only in accordance with the terms of that agreement. Copyright Notice Copyright 2014 Weidmüller Interface GmbH &Co. KG.
  • Page 3 Contact Information Weidmüller Interface GmbH & Co. KG Postbox 3030 32760 Detmold Klingenbergstraße 16 32758 Detmold Germany Phone: +49(0) 5231 14-0 Fax:+49(0) 5231 14-2083 E-Mail info@weidmueller.com Internet www.weidmueller.com - 3 -...

  • Page 4: Table Of Contents

    Contents 1. INTRODUCTION ....................5 1.1 Overview Modbus TCP/RTU Gateway ................... 5 1.2 Modbus Basics ..........................6 2. PACKAGE CHECKLIST ..................8 3. OVERVIEW PRODUCT FEATURES ..............8 4. HARDWARE DESCRIPTION ................. 9 4.1 Panel Layout ............................ 9 4.2 LED Indicators ..........................9 4.3 Dimensions ............................

  • Page 5: Introduction

    1. Introduction Welcome to the Weidmüller Modbus TCP/RTU gateways. All models feature easy integration of Modbus TCP to Modbus RTU/ASCII and feature RS-232/422/485 ports for Modbus serial communication. 1.1 Overview Modbus TCP/RTU Gateway The Weidmüller Modbus TCP/RTU Gateways provides users with Seamless integration of Ethernet and serial Modbus devices Powerful operation modes to handle almost any Modbus application Windows utility for easy setup and traffic monitoring...

  • Page 6: Modbus Basics

    1.2 Modbus Basics Introduction Modbus is one of the most popular automation protocols in the world. It supports both serial and Ethernet devices. Many industrial devices, such as PLCs, DCSs, HMIs, instruments, meters, motors, and drivers use Modbus as their communication standard. Devices are either Masters or Slaves All Modbus devices are classified as either a master or a slave.
  • Page 7 Exception The master sends a request to the slave. The slave may not support the command or an error is detected. As result the slave sends an exception to the master. Broadcast The master sends a broadcast command, such as a reset command. Every slave on the network accepts the command.

  • Page 8: Package Checklist

    2. Package Checklist All models of Weidmüller Modbus TCP/RTU Gateways are shipped with the following items: 1 Modbus Gateway Hardware Installation Guide (includes Download-Links for this user manual and firmware updates) 3. Overview Product Features Integration of Modbus TCP and Modbus RTU/ASCII networks Up to 31 Modbus RTU/ASCII slaves can be connected to the serial port (RS-485) Up to 32 Modbus TCP slaves can be connected to a Modbus RTU/ASCII master Up to 16 Modbus TCP masters can control Modbus RTU/ASCII slaves simultaneously...

  • Page 9: Hardware Description

    4. Hardware description The hardware information is valid for models  Standard Temperature range model (0 to 55°C) IE-GW-MB-2TX-1RS232/485 IE-GWT-MB-2TX-1RS232/485  Extended Temperature range model (-40 to 75°C) 4.1 Panel Layout 4.2 LED Indicators Name Color Function PWR1 Power is being supplied to the power input.

  • Page 10: Dimensions

    Orange Serial port is receiving data. Green Serial port is transmitting data. No data is being transmitted or received through the serial port. 4.3 Dimensions - 10 -...

  • Page 11: Jumpers

    4.4 Jumpers The DIP switches are located beneath the DIP switch panel on the side of the unit. To add a 120 Ω termination resistor set switch 3 to ON. To disable the 120 Ω termination resistor set switch 3 to OFF (default setting). To set the pull high/low resistors to 150 KΩ...

  • Page 12: Din-Rail, Wall Mounting

    4.5 DIN-Rail, Wall Mounting There are two sliders on the rear side of the unit for DIN-rail and wall mounting. Mounting on a DIN-rail Pull out the bottom slider, latch the unit onto the DIN-rail, and push the slider back in. Mounting on the wall Pull out both the top and bottom sliders and align the screws accordingly.

  • Page 13: Pin Assignments

    4.6 Pin Assignments 4.6.1 DB9 male connector (RS232) Use DB9 connector (male) for RS-232 connections to Modbus RTU or ASCII devices. RS-232 4.6.2 Terminal Block (RS-422, RS-485) Use terminal block connector for RS-422 and RS-485 connections to Modbus RTU or ASCII devices. RS-422 RS-485 (2-wire) RS-485 (4-wire)

  • Page 14: Specifications

    5. Specifications Software Features Operation Modes RTU Slave, RTU Master, ASCII Slave, ASCII Master 16 simultaneous TCP masters, 32 simultaneous requests for each TCP master Multi-Masters and Multi-Request Serial redirection, Priority control Power Requirements Power Input 12 to 48 VDC Max.
  • Page 15 Flow Control RTS/CTS, XON/XOFF Alarm Contact 1 relay output with a current capacity of 1 A @ 30 VDC Conditions: Relay Output Open when Power-off or when a relay-based alarm is triggered Closed when Power-on and no relay-based alarm is triggered Environmental Limits 0 to 55°C (32 to 131°F), Operating Temperature...

  • Page 16: Getting Started

    6. Getting Started 6.1 Reset to factory default values by external Reset button The reset button – located on top side of the housing - is used to load factory defaults. Use a pointed object such as a straightened paper clip to hold the reset button down for 5 seconds. Release the reset button when the Ready LED stops blinking.

  • Page 17: Device Configuration

    7. Device Configuration The Modbus TCP/RTU Gateway can be configured via one of the 2 Ethernet ports by Integrated Webinterface Telnet Console or by PC-based utility “Modbus Gateway Administrator” 7.1 Device configuration by Web-Interface The Web interface can be accessed via IP address 192.168.1.110 and subnet mask 255.255.255.0 (Factory default values).

  • Page 18: Menu Items "Basic Settings

    7.1.1 Menu items “Basic Settings” The Basic Settings section includes the most common settings required by administrators to maintain and control a Weidmüller Modbus Gateway. 7.1.1.1 Basic Settings  Mode The menu item Mode allows users to configure the Modbus operation modes. Operation mode of physical serial port The operation mode determines whether the device(s) that are connected to the serial port will operate as master or as slave(s), and whether the Modbus RTU or Modbus ASCII protocol will be used.
  • Page 19 7.1.1.2 Basic Settings  Network The Network configuration allows users to configure the Ethernet network parameters. Network parameter settings Setting Description Factory Default IP Configuration Select “Static IP” if you are using a fixed IP address. The unit's Static default IP address 192.168.1.110 DHCP Static The Gateway‟s IP address will be assigned automatically by the...
  • Page 20 7.1.1.3 Basic Settings  Serial The menu item Serial is where the serial port‟s communication parameters are configured. You can configure Baud Rate, Parity, Stop Bit, Flow Control, FIFO and Interface Mode. Serial parameter settings Parameter Value RS-232 RS-422 Interface Mode RS-485, 2-wire RS-485, 4-wire Baud Rate...
  • Page 21 7.1.1.4 Basic Settings  Slave ID The menu item Slave ID Map is where the slave ID‟s of the serial Modbus devices are managed. This mapping determines how requests from a Master will be routed to slave devices. Slave ID related parameter settings when adding new TCP slaves Parameter Value Remote IP address...
  • Page 22 device ID. This kind of mapping allows a unique addressing of serial RTU/ASCII and Modbus TCP devices having the same real device ID. Example 1: Default „Slave ID Map“ for RTU/ASCII slaves connected to the serial port. By default there is direct assignment between virtual and public accessible device ID and real device ID (without any offset).

  • Page 23: Menu Items "Advanced Settings

    7.1.2 Menu items “Advanced Settings” 7.1.2.1 Advanced Settings  Modbus The menu item Modbus is where certain adjustments can be made to optimize the communication between Modbus devices. Modbus parameter settings Initial Delay Some Modbus slaves may take more time to boot up than other devices. For certain environments, this may cause the entire system to suffer from repeated exceptions during the initial boot-up.
  • Page 24 Exception type: Conditions Timeout  There is no response from the slave. Maybe the device is off-line or the serial cable is broken. Request dropped  There are two situations that will result in this exception: 1. The request queue is full (32 request queue for each master). 2.
  • Page 25 7.1.2.2 Advanced Settings  Priority Control By using Priority Control emergency requests can be treated with higher priority. This feature is designed for requests that are sent to Modbus RTU/ASCII slaves. Since Modbus RTU/ASCII slaves can‟t handle multiple requests, the Modbus Gateway must send each request individually and wait for the response before sending the next request.
  • Page 26 Advanced Settings  Priority Control  Specified TCP Port Advanced Settings  Priority Control  Specified Request To define a priority request, enable the appropriate priority scheme (Specified Masters, Specified TCP Port, or Specified Requests). Then set the parameters for a priority request. Finally, click Add/Modify to apply this definition.
  • Page 27 7.1.2.3 Advanced Settings  Accessible IP List The Modbus Gateway uses an IP address-based filtering method to control access by itself. The Accessible IP List function allows you to add or block remote host IP addresses to prevent unauthorized access. Example configurations Example 1 : Only one host with a specific IP address shall access the device Enter target IP address (e.g.
  • Page 28 7.1.2.4 Advanced Settings  SNMP The SNMP function allows users to adjust SNMP related settings. To enable the SNMP function, select the Enable checkbox. Community Name: This field specifies the read/write community string used for the SNMP Agent. This is a text password mechanism that is used to weakly authenticate queries to agents of managed network devices.
  • Page 29 7.1.2.5 Advanced Settings  Miscellaneous This menu item provides settings for Warning functionality using the built-in relay Behaviour of external Reset Button and Access to Webinterface and Telnet console. Auto Relay Warning Functions The built-in relay can be used for warnings based on following trigger events: Power failure No link or link down of Ethernet port 1 No link or link down of Ethernet port 2...

  • Page 30: Menu Items "Maintenance Settings

    7.1.3 Menu items “Maintenance Settings” 7.1.3.1 Maintenance Settings  Firmware Upgrade This menu item can be used to upgrade the Firmware by installing a file with extension “.rom” (eg. FWR_IE-GW-MB-2TX-1RS232_485_V1.0_Build_14050818.rom) The dialog boxes will guide you through the process. You will need to browse your PC for the firmware file.
  • Page 31 7.1.3.2 Maintenance Settings  Import Configuration This feature can be used to upload a file-based configuration with extension type *.cfg into the Gateway. To import a configuration file into the Modbus Gateway, click Browse to select the configuration file (which originally was stored via the function Export configuration). The upload procedure will proceed automatically after clicking Import.
  • Page 32 7.1.3.4 Maintenance Settings  Load Factory Default Via menu item Load Factory Default the Modbus Gateway can be reset to Factory default values. By activating the checkbox the current IP address will not be changed when clicking button Activate. If the checkbox is cleared then also the IP address will be reset to factory default IP 192.168.1.110.

  • Page 33: Menu Item "Restart

    Password Settings Setting Description Factory Default Old password Enter the current password when changing the password Detmold (max. 16 characters) New password Type new password when changing the password None (max. 16 characters) Confirm password If you type a new password in the Password field you will be (Max.

  • Page 34: Configuration And Monitoring Via Pc-Based Tool Modbus Gateway Administrator

    7.2 Configuration and Monitoring via PC-based tool Modbus Gateway Administrator The PC-based software tool Modbus Gateway Administrator can be used for Device configuration (alternatively to Web-based configuration) Data monitoring and troubleshooting Providing virtual COM-Ports on a PC (called ProCOM) to allow communication between a PC-based Modbus RTU master application and serial slaves (connected to Modbus Gateway) via Ethernet The utility Modbus Gateway Administrator can be downloaded from the Weidmüller Internet page...
  • Page 35 The Modbus Gateway Administrator window should appear as shown below. 7.2.2 Searching Devices Searching for Modbus Gateway devices The button Search can be used to find devices either by Broadcast search or by addressing an unique IP address. Broadcast Search allows to find Modbus Gateway„s on the LAN by sending a Layer-2 based Ethernet broadcast frame independant of used IP addresses.
  • Page 36 Broadcast Search Click button Search and following window will pop up. Select Broadcast Search (default) and click OK to begin searching the LAN for all Gateway units. When the search is complete, every device that is found on the LAN will be displayed in the window as shown below.
  • Page 37 7.2.3 Modifying the Configuration Once your unit is displayed in the device list window, select it by clicking on it. The Configuration button will become available. Note: By clicking with right mouse button on a displayed item the Web Interface can be opened.
  • Page 38 Configuration  Tab Mode Modbus operation modes of the physical Refer to chapter 7.2.9 serial port. For more (ProCOM Mappings) how to information refer to use and configure virtual chapter 7.1.1.1 (Basic ProCOM ports. Settings  Mode) Configuration  Tab Network Set, change or clear the password.
  • Page 39 Configuration  Tab Serial Parameters of the serial interface Configuration  Tab Slave ID Map Configuration of slave ID‟s by assignment of public accessible virtual ID‟s and real device ID‟s. Refer to chapter 7.1.1.4 for more information how to use slave ID mapping. - 39 -...
  • Page 40 Configuration  Tab Modbus Modbus-specific parameter settings. Refer to chapter 7.1.2.1 for more information how to define and use the parameters. Configuration  Tab Priority Control Refer to chapter 7.1.2.2 for more information about priority settings. - 40 -...
  • Page 41 Configuration  Tab Accessible IP Refer to chapter 7.1.2.3 for more information about IP based access control. Configuration  Tab SNMP Refer to chapter 7.1.2.4 for more information about SNMP settings. - 41 -...
  • Page 42 Configuration  Tab Miscellaneous Refer to chapter 7.1.2.5 for more information about setting of these parameters. 7.2.4 Verifying the Location of the Unit If you are managing multiple Modbus Gateway„s, you may wonder if you are configuring the correct unit in Modbus Gateway Administrator. You can select a unit in the device list and click button Locate. The “Ready”...
  • Page 43 7.2.5 Load Factory Defaults By clicking button Load Default the Modbus Gateway can be reset to Factory default values. If a password is set then you need to enter the password to reset the device to Factory defaults. 7.2.6 Import / Export The Export button can be used to save a configuration into a file with extension *.cfg.
  • Page 44 7.2.7 Upgrade Firmware This button can be used to upgrade the Firmware by installing a file with extension “.rom” (eg. FWR_IE-GW-MB-2TX-1RS232_485_V1.0_Build_14050818.rom). The dialog boxes will guide you through the process. You will need to browse your PC for the firmware file.
  • Page 45 7.2.9 ProCOM Mapping This function installs up to 4 virtual COM ports on a PC and enables a PC‟s Modbus application – eg. running as RTU/ASCII Master - to communicate with RTU/ASCII Slaves via Ethernet and the Modbus Gateway. A PC can use ProCOM‟s virtual COM-Ports to communicate over the Ethernet with serial devices as if they were connected to the PC‟s native COM ports.
  • Page 46 Note: The IP address of the selected Modbus Gateway automatically is used if the item was highlighted. If you want you can change the IP address referring to another Modbus Gateway. 2. Click button Add to install 4 new virtual COM-Ports on the PC. As COM-Port numbers 4 free port numbers automatically will be assigned.
  • Page 47 4. Click button Configuration and select tab Mode (Default tab) We want to use PC‟s virtual Com-Port 2 to communicate with serial slaves behind the Modbus Gateway with IP 192.168.1.110. According to ProCOM mapping the PC‟s Com-Port 2 is assigned to Gateway‟s ProCOM-Port 2.
  • Page 48 7.2.10 Monitoring Modbus Activity For troubleshooting or management purposes, you can monitor the data passing through a Modbus Gateway on the network. Data events can be logged when they pass the gateway. Rather than simply echoing the data this feature presents the data in an intelligent and easily-understood format displaying fields like source and destination addresses, contents, traffic direction and more.
  • Page 49 If any traffic is passing the Gateway it will be displayed in the window as shown below for example. This window displays the complete data string of a highlighted item. To stop capturing the logging click button Stop. Filter Traffic Information By default, all events are displayed in the traffic monitor window.
  • Page 50 FCODE=<Modbus function Function code code> Show only traffic for a specific function code only (e.g., “FCODE=3”) Note: Filtering is only enabled for filter criteria Slave ID only, Source only and Function code only. Save / Load of logged data To save the data log to a file, click Save. You may retrieve a saved log by clicking Load. - 50 -...

  • Page 51: Typical Applications

    8. Typical Applications 8.1 Ethernet Master (TCP) with multiple serial Slaves (RTU) Application: The Modbus TCP Master is connected to the Ethernet network running Modbus TCP protocol. Serial Modbus devices – running as RTU slaves - are connected to the Ethernet network via the Modbus TCP/RTU Gateway.

  • Page 52: Serial Master (Rtu) With Serial Slaves (Rtu) And Ethernet Slaves (Tcp)

    8.2 Serial Master (RTU) with serial Slaves (RTU) and Ethernet Slaves (TCP) Application: One serial Master (Modbus RTU/ASCII) and several Modbus RTU Slaves are connected to the serial port of the Modbus Gateway. Ethernet-based Modbus devices (Modbus TCP) – running as slaves - are connected to the Ethernet network.

  • Page 53: Serial Master (Rtu) With Multiple Serial Slaves (Rtu) Over Ethernet

    8.3 Serial Master (RTU) with multiple serial Slaves (RTU) over Ethernet Application: One serial Master (Modbus RTU/ASCII) is connected to the serial port of the Modbus Gateway. At remote side multiple groups of serial Slaves are connected each to a Modbus Gateway. Each Modbus Gateway is able to communicate via Ethernet/Internet with each other.

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