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MESR9xx
User Manual
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B&B Electronics MESR9xx User Manual

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Manual Documentation Number MESR9xx-4508m
www.bb-elec.com
www.bb-europe.com
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Phone (815) 433-5100 -- General Fax (815) 433-5105
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B&B Electronics Mfg. Co. Inc.
707 Dayton Road
Ottawa, IL 61350 USA
Website:
European Headquarters
Westlink Commercial Park
Oranmore, Co. Galway, Ireland
Phone +353 91-792444 -- Fax +353 91-792445
Website:
www.bb-elec.com
B&B Electronics Ltd.
www.bb-europe.com
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Revision – Original – October 2008
©2008 B&B Electronics Mfg. Co. Inc. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photography, recording, or any information storage and retrieval system without written consent. Information in this manual is subject to change without notice, and does not represent a commitment on the part of B&B Electronics Mfg. Co. Inc.
B&B Electronics Mfg. Co. Inc. shall not be liable for incidental or consequential damages resulting from the furnishing, performance, or use of this manual.
All brand names used in this manual are the registered trademarks of their respective owners. The use of trademarks or other designations in this
ublication is for reference purposes only and does not constitute an endorsement by the trademark holder.
Manual Documentation Number MESR9xx-4508m
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Table of Contents
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1. Introduction ....................................................................................................................................................... 1
About MESR9xx Modbus Gateways .......................................................................................................................................... 1
MESR9xx Modbus Gateway Model Numbering ......................................................................................................................... 2
List of MESR9xx Modbus Gateway Models ............................................................................................................................... 3
MESR9xx Modbus Gateway Features ....................................................................................................................................... 4
Vlinx Manager Configuration Software ....................................................................................................................................... 5
2. MESR9xx Modbus Gateway Hardware ............................................................................................................ 6
Package Checklist ...................................................................................................................................................................... 6
MESR9xx Modbus Gateway Enclosures and Mounting ............................................................................................................. 6
LED Indicators ............................................................................................................................................................................ 7
E1/E2 Ethernet Link LED .............................................................................................................................................. 7
Ready LED ..................................................................................................................................................................... 7
Serial Port LEDs ............................................................................................................................................................ 7
Mode Switch ............................................................................................................................................................................... 8
Ethernet Connector .................................................................................................................................................................... 8
Fiberoptic Connectors ................................................................................................................................................................ 9
Serial Port Connectors ............................................................................................................................................................... 9
Power Connector ..................................................................................................................................................................... 10
Mounting Hardware .................................................................................................................................................................. 10
3. Modbus Gateway Setup and Connections ................................................................................................... 12
Connecting the Power Supply .................................................................................................................................................. 12
Connecting MESR9xx Modbus Gateways to Modbus networks .............................................................................................. 12
Connecting the MESR901-x ......................................................................................................................................... 13
Connecting the MESR902T-x ....................................................................................................................................... 14
Connecting the MESR902D-x ...................................................................................................................................... 14
Connecting MESR9xx Modbus Gateways to a Network .......................................................................................................... 15
Network Connection (10BaseT/100BaseTX) ................................................................................................................ 15
Fiberoptic Connection ................................................................................................................................................. 15
MESR9xx Modbus Gateway Configuration Connections ......................................................................................................... 15
Configuring the MESR9xx Modbus Gateway via the Network Connection .................................................................. 16
Configuring the MESR9xx Modbus Gateway via the Serial Port (Console Mode) ...................................................... 17
MESR9xx Modbus Gateway Operational Connections ............................................................................................................ 18
Using MESR9xx Modbus Gateways in Direct IP Mode ............................................................................................... 18
Initiating a Hardware Reset on the Modbus Gateway .............................................................................................................. 19
Reloading Factory Defaults ...................................................................................................................................................... 20
4. Description, Modbus Gateway Properties .................................................................................................... 21
Attached ................................................................................................................................................................................... 21
Baud Rate ................................................................................................................................................................................ 21
Character Timeout ................................................................................................................................................................... 21
Configuration Files ................................................................................................................................................................... 21
Data/Parity/Stop ....................................................................................................................................................................... 22
Default Gateway ....................................................................................................................................................................... 22
DHCP ....................................................................................................................................................................................... 22
Firmware Version ..................................................................................................................................................................... 23
Hardware Version .................................................................................................................................................................... 23
ID Routing ................................................................................................................................................................................ 23
IP Address ................................................................................................................................................................................ 23
Link Status ............................................................................................................................................................................... 24
MAC Address ........................................................................................................................................................................... 24
Modbus Priority ........................................................................................................................................................................ 24
Modbus Serial Retries .............................................................................................................................................................. 24
Modbus ASCII .......................................................................................................................................................................... 25
Modbus Message Buffering ..................................................................................................................................................... 25
Modbus Message Timeout ....................................................................................................................................................... 25
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Table of Contents
Modbus RTU Message ............................................................................................................................................................ 25
Modbus Serial Control .............................................................................................................................................................. 25
Modbus TCP Message ............................................................................................................................................................. 26
Model ....................................................................................................................................................................................... 26
Network Mode .......................................................................................................................................................................... 26
Network Protocols .................................................................................................................................................................... 26
Password ................................................................................................................................................................................. 27
Port# ID Remap ....................................................................................................................................................................... 27
Serial Interface Modes ............................................................................................................................................................. 27
Modbus Gateway Name ........................................................................................................................................................... 28
Gateway Serial Port Number ................................................................................................................................................... 28
Subnet Mask ............................................................................................................................................................................ 28
TCP (Transmission Control Protocol) ...................................................................................................................................... 29
5. Upgrading the Modbus Gateway Firmware .................................................................................................. 30
Downloading Firmware Files .................................................................................................................................................... 31
Uploading the Firmware to the Modbus Gateway .................................................................................................................... 31
6. Diagnostics ..................................................................................................................................................... 33
Testing a Modbus Gateway Connection .................................................................................................................................. 33
7. Application Examples ..................................................................................................................................... 35
From Serial Master to Modbus Gateway, Slave IDs Configurable ........................................................................................... 35
From Serial Masters To Ethernet Master, Slave IDs Fixed ...................................................................................................... 36
Keep Serial Master, Add Ethernet Master(s) ........................................................................................................................... 36
Modbus RTU, ASCII, and TCP Integration .............................................................................................................................. 37
8. Modbus Help ................................................................................................................................................... 38
Modbus ASCII/RTU Basics ...................................................................................................................................................... 38
Hints and Tips .......................................................................................................................................................................... 39
9. Appendices ..................................................................................................................................................... 40
Appendix A: Default Gateway Settings .................................................................................................................................... 41
Appendix B: Product Specifications ......................................................................................................................................... 42
General Specifications ................................................................................................................................................. 43
Controls, Indicators and Connector Specifications ...................................................................................................... 44
Serial Interface Specifications ..................................................................................................................................... 45
Network Specifications ................................................................................................................................................. 46
Appendix C: Dimensional Diagrams ........................................................................................................................................ 47
Appendix D: Connector Pinouts ............................................................................................................................................... 51
MESR901-x Serial Port Pinouts ................................................................................................................................... 51
MESR902D-x Serial Port Pinouts ................................................................................................................................ 53
MESR902T-x Serial Port Pinouts ................................................................................................................................. 54
Standard Ethernet Cable RJ-45 Pin-out ....................................................................................................................... 55
10. Glossary .......................................................................................................................................................... 56
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1. Introduction Vlinx MESR9xx Modbus Gateway
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Thank you for purchasing a MESR9xx Modbus Gateway product! This product has been manufactured to the highest standards of quality and performance to ensure your complete satisfaction.
Figure 1. An MESR921 Modbus Gateway
About MESR9xx Modbus Gateways
MESR9xx Modbus Gateways connect Modbus networks (RS-232, RS-422 or RS-485) to Ethernet networks, allowing the Modbus network to become a node on the network. The serial ports can be accessed over a LAN/WAN using Direct IP Mode connections. MESR9xx Modbus Gateways feature 10BaseT or 100BaseTX copper network media and fiber optic media options, depending on the model. MESR9xx Modbus Gateways are built for use in industrial environments, featuring an IP30 approved slim line DIN rail mountable case. They operate from a range of DC power supply voltages and feature pluggable terminal block power connectors. An external power supply, sold separately, is required. The photograph above is an MESR921 gateway. The MESR92x units have an additional Ethernet port which functions much like an Ethernet Switch. MESR90x units have one Ethernet port.
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1. Introduction Vlinx MESR9xx Modbus Gateway
MESR9xx Modbus Gateway Model Numbering
MESR9xx Modbus Gateways are a growing family of products. Models are available with one or two serial connections. Network connection options include 10BaseT/100BaseTX copper or several different fiber optic options. The following diagram shows the model numbering scheme:
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1. Introduction Vlinx MESR9xx Modbus Gateway
List of MESR9xx Modbus Gateway Models
The following table lists the various MESR9xx Modbus Gateway models available.
Model Number Features
MESR922T 2 RJ45 Copper, 2 port MEI with TB MESR922T-MT 1 Multi-mode ST, 1 RJ45 Copper, 2 port MEI with TB MESR922T-MC 1 Multi-mode SC, 1 RJ45 Copper, 2 port MEI with TB
MESR922T-ST 1 Single-mode ST, 1 RJ45 Copper, 2 port MEI with TB
MESR922T-SC 1 Single-mode SC, 1 RJ45 Copper, 2 port MEI with TB MESR922T-ST40 1 Single-mode 40 Km ST, 1 RJ45 Copper, 2 port MEI with TB MESR922T-SC40 1 Single-mode 40 Km SC, 1 RJ45 Copper, 2 port MEI with TB MESR922T-ST80 1 Single-mode 80 Km ST, 1 RJ45 Copper, 2 port MEI with TB MESR922T-SC80 1 Single-mode 80 Km SC, 1 RJ45 Copper, 2 port MEI with TB
MESR921 2 RJ45 Copper, 1 port MEI with TB/DB9 Male MESR921-MT 1 Multi-mode ST, 1 RJ45 Copper, 1 port MEI with TB/DB9 Male MESR921-MC 1 Multi-mode SC, 1 RJ45 Copper, 1 port MEI with TB/DB9 Male
MESR921-ST 1 Single-mode ST, 1 RJ45 Copper, 1 port MEI with TB/DB9 Male
MESR921-SC 1 Single-mode SC, 1 RJ45 Copper, 1 port MEI with TB/DB9 Male
MESR921-ST40 1 Single-mode 40 Km ST, 1 RJ45 Copper, 1 port MEI with TB/DB9 Male MESR921-SC40 1 Single-mode 40 Km SC, 1 RJ45 Copper, 2 port MEI with DB9 Male MESR921-ST80 1 Single-mode 80 Km ST, 1 RJ45 Copper, 1 port MEI with TB/DB9 Male MESR921-SC80 1 Single-mode 80 Km SC, 1 RJ45 Copper, 1 port MEI with TB/DB9 Male
MESR902T 1 RJ45 Copper, 2 port MEI with TB
MESR902T-MT 1 Multi-mode ST, 2 port MEI with TB MESR902T-MC 1 Multi-mode SC, 2 port MEI with TB
MESR902T-ST 1 Single-mode ST, 2 port MEI with TB MESR902T-SC 1 Single-mode SC, 2 port MEI with TB
MESR902T-ST40 1 Single-mode 40 Km ST, 2 port MEI with TB
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1. Introduction Vlinx MESR9xx Modbus Gateway
Model Number Features
MESR902T-SC40 1 Single-mode 40 Km SC, 2 port MEI with TB MESR902T-ST80 1 Single-mode 80 Km ST, 2 port MEI with TB MESR902T-SC80 1 Single-mode 80 Km SC, 2 port MEI with TB
MESR901 1 RJ45 Copper, 1 port MEI with TB/DB9 Male MESR901-MT 1 Multi-mode ST, 1 port MEI with TB/DB9 Male MESR901-MC 1 Multi-mode SC, 1 port MEI with TB/DB9 Male
MESR901-ST 1 Single-mode ST, 1 port MEI with TB/DB9 Male
MESR901-SC 1 Single-mode SC, 1 port MEI with TB/DB9 Male MESR901-ST40 1 Single-mode 40 Km ST, 1 port MEI with TB/DB9 Male MESR901-SC40 1 Single-m ode 40 Km SC, 2 p ort MEI with DB9 Male MESR901-ST80 1 Single-mode 80 Km ST, 1 port MEI with TB/DB9 Male MESR901-SC80 1 Single-mode 80 Km SC, 1 port MEI with TB/DB9 Male
MESR9xx Modbus Gateway Features
• Four series models
• MESR901-x (single serial port, single Ethernet Port)
• MESR902T-x (two serial ports with pluggable terminal blocks, single Ethernet
port)
• MESR921-x (single serial port, two Ethernet Ports)
• MESR922T-x (two serial ports with pluggable terminal blocks, two Ethernet
Ports)
• On models with two Ethernet Ports, the second port is an Ethernet pass-
through port. This port functions much like an unmanaged switch.
• Fiber models available for each of the above series
• Multi-interface serial ports
• DB-9M and pluggable terminal block serial port connector options
• All ports are software selectable as RS-232, RS-422 or RS-485 2- and 4-wire
• Configuration can be done via network or direct serial connection
• Slim line DIN rail mountable case
• Accepts DC power over a wide voltage range
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1. Introduction Vlinx MESR9xx Modbus Gateway
• 10/100 Mbps Ethernet with Auto Selection, Auto MDI/MDIX
• LAN and WAN Communications
• TCP Client or Server operation - configurable
• Firmware Upload for future revisions/upgrades
• Software Support - Windows 2000/2003 Server/XP/Vista x32
• Configuration of Ethernet and serial port settings using Vlinx Manager software
Vlinx Manager Configuration Software
Vlinx Manager configuration software enables you to find connected Modbus gateways, configure them, upgrade Modbus gateway firmware, and save/load configuration files. It features a graphical user interface (GUI) that is convenient and easy to use.
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2. Hardware Vlinx MESR9xx Modbus Gateway
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MESR9xx Modbus Gateways are enclosed in DIN rail mountable enclosures and feature LED indicators, power, Ethernet and serial connectors and a recessed Mode switch.
Package Checklist
MESR9xx Modbus Gateways are shipped with the following items included:
• MESR9xx Modbus Gateway Module
• Quick Start Guide
• CD with User Manual, Quick Start Guide and firmware
MESR9xx Modbus Gateway Enclosures and Mounting
All MESR9xx Modbus Gateway models are built into similar enclosures. Modules are DIN rail mountable. The MESR92x (shown below) enclosure is larger than the MESR90x.See the specification table for dimensions.
Figure 2. Front View of an MESR921 Modbus Gateway
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2. Hardware Vlinx MESR9xx Modbus Gateway
LED Indicators
MESR9xx Modbus Gateways have three types of LED indicators: Ethernet Link LEDs, a Ready LED and Serial Port LEDs.
Figure 3. Ready Ethernet Port LEDs on 1 and 2 Ethernet Port Modbus Gateways
E1/E2 Ethernet Link LED
The Ethernet Link LED (E1 or E2) illuminates (green) if the Ethernet is connected. When the LED is blinking it indicates that there is data traffic on the Ethernet link.
E1 is used for all models to connect to the network. E2 is used on MESR92X models, and is a pass-through Ethernet connector.
Ready LED
The Ready LED (green) blinks if the system is operating correctly, once per second in normal operating conditions, or three times per second in reset, configuration mode, or when loading factory defaults. If the LED is off or steady, it indicates the system is not operating correctly.
Serial Port LEDs
MESR901-x Modbus Gateways feature one serial port. MESR902D, and MESR902T-x Modbus Gateways feature two serial ports. Each serial port has an associated LED. Serial Port LEDs blink (green) when data is being transmitted or received on the serial port. When the LED is On it indicates the serial port is open.
Figure 4. Serial Port LEDs on 1 and 2 Serial Port Modbus Gateways
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2. Hardware Vlinx MESR9xx Modbus Gateway
Mode Switch
A recessed momentary reset switch is located on the top of the enclosure. To activate the switch, insert a small plastic tool through the hole in the enclosure and press lightly.
Figure 5. Mode Switch
The Mode switch can be used to:
• Initiate a Hardware Reset
• Enter Console Mode
• Reload factory defaults
Note: Refer to Section 3. Modbus Gateway Setup and Connections for more information on using the Mode switch.
Ethernet Connector
Modbus gateway models using 10BaseT/100BaseTX network connections use an RJ45 receptacle. The Modbus gateway is connected to a standard Ethernet network drop using a straight-through RJ45 (male) Ethernet cable.
Figure 6. Ethernet Connectors. E2 is pass-through connection on model shown
Note: Refer to Appendix D for connection pin-outs.
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2. Hardware Vlinx MESR9xx Modbus Gateway
Fiberoptic Connectors
Modbus gateway models using fiber optic network connections use either SC or ST connectors, depending on the specific model.
Figure 7. SC and ST Fiberoptic Cable Connectors
Serial Port Connectors
MESR9xx Modbus Gateways use four serial port connector configurations, depending on the model:
• MESR901-x Modbus Gateways feature one serial port and use a DB-9M
connector for RS-232 and a five-position removeable terminal block for RS-422 and RS-485 connections.
• MESR902T-x Modbus Gateways feature two serial ports, both using five-position
removable terminal blocks for RS-232, RS-422 and RS-485 connections.
• MESR921-x Modbus Gateways feature one serial port and use a DB-9M
connector for RS-232 and a five-position removeable terminal block for RS-422 and RS-485 connections.
• MESR922T-x Modbus Gateways feature two serial ports, both using five-position
removable terminal blocks for RS-232, RS-422 and RS-485 connections.
Figure 8. DB-9 Female Serial Port Connector
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2. Hardware Vlinx MESR9xx Modbus Gateway
Figure 9. Five-Position Pluggable Terminal Block
Note: Refer to Appendix D for connection pin-outs.
Power Connector
The power connector is a 2-position pluggable terminal block.
Figure 10. Power Connection
Mounting Hardware
MESR9xx Modbus Gateway modules can be DIN rail mounted. The DIN mounting clip and spring is included on each module.
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2. Hardware Vlinx MESR9xx Modbus Gateway
Figure 11. DIN Clips on Modbus Gateway Modules. Large DIN clips are used on MESR92x, small DIN clips on MESR90x.
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3. Setup and Connections Vlinx MESR9xx Modbus Gateway
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This section describes how to setup and connect MESR9xx Modbus Gateways.
Note: In this section devices to be connected to the Modbus gateway’s serial connection are simply referred to as the “Modbus network”.
Connecting the Power Supply
Connect a DC power supply to the power terminals on the top of the Modbus gateway. Polarity of the wires is indicated on the label on the side of the Modbus gateway. Acceptable voltages are between 10 VDC and 48 VDC. The power supply must be capable of supplying 4 Watts for MESR90x units or 6 Watts fro MESR92x units.
Figure 12. MESR Power Connection
Connecting MESR9xx Modbus Gateways to Modbus networks
MESR9xx Modbus Gateways can be configured to connect to Modbus networks using RS-232, RS-422, RS-485 2-wire and RS-485 4-wire.
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3. Setup and Connections Vlinx MESR9xx Modbus Gateway
RS-232 connections support eight signal lines plus Signal Ground. Signals are single ended and referenced to Ground. Default communications parameters are 9600, 8, N, 1 and no flow control implemented.
RS-422 connections support two signal pairs: RXA(-), RXB(+) and TXA(-), TXA(+), plus GND. The data lines are differential pairs (A & B) in which the B line is positive relative to the A line in the idle (mark) state. Ground provides a common mode reference.
RS-485 connections support 2-wire or 4-wire operation. When configured for 4-wire operation the connection supports two signal pairs: RXA(-),
RXB(+) and TXA(-), TXA(+), plus GND. This makes full-duplex operation possible. The data lines are differential pairs (A & B) in which the B line is positive relative to the A line in the idle (mark) state. Ground provides a common mode reference.
When configured for 2-wire operation the connection supports one signal pair: DataB(+) and DataA(-) signal channels using half-duplex operation. The data lines are differential with the Data B line positive relative to Data A in the idle (mark) state. Ground provides a common mode reference.
Connecting the MESR9x1-x
The MESR9x1-x has one serial connection that supports RS-232, RS-422 and RS-485 (2- and 4-wire). The unit has two connectors: a DB-9M connector and a 5-position terminal block.
If you select RS-232 mode when you configure the Modbus gateway, you must connect the Modbus network to the Modbus gateway via a serial cable. The MESR901 is a DTE. If the Modbus network is a DTE, use a null modem (cross-over) cable. If the Modbus network is a DCE, use a straight-through cable.
If you select RS-422 mode, RS-485 2-wire mode, or RS-485 4-wire mode when you configure the Modbus gateway, you must connect the Modbus network appropriately, via the 5-position terminal block.
Note: Refer to Appendix D for connector pinout information.
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3. Setup and Connections Vlinx MESR9xx Modbus Gateway
Figure 13. MESR901 Conn ections
Connecting the MESR9x2T-x
The MESR9x2T-x has two serial connections that support RS-232, RS-422 and RS-485 (2- and 4-wire). The unit has two connectors, both of which are 5-position terminal blocks. Make the appropriate connections to the terminal blocks to match the serial connection mode you select when configuring the Modbus gateway.
Note: Refer to Appendix D for connector pinout information.
Figure 14. MESR902T-x Connections
Connecting the MESR9x2D-x
The MESR9x2D-x has two serial connections that support RS-232, RS-422 and RS-485 (2- and 4-wire). The unit has two connectors, both of which are DB-9M connectors. You must connect the Modbus network to the Modbus gateway via a serial cable. The MESR902D is a DTE. If the Modbus network is a DTE, use a null modem (cross-over) cable. If the Modbus network is a DCE, use a straight-through cable.
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3. Setup and Connections Vlinx MESR9xx Modbus Gateway
Note: Refer to Appendix D for connector pinout information.
Figure 15. MESR902D-x Connections
Connecting MESR9xx Modbus Gateways to a Network
Network Connection (10BaseT/100BaseTX)
When connecting a Modbus gateway equipped with a 10BaseT/100BaseTX network connection (RJ45 connector) a standard network cable is connected from the Modbus
gateway to a network drop. PCs configuring and/or communicating with the Modbus gateway are also connected to the network.
Fiberoptic Connection
When connecting a Modbus gateway equipped with a fiberoptic interface to a fiberoptic link the appropriate fiberoptic cable must be connected between the Modbus
gateway and the network interface. Refer to Figure 2, “List of MESR9xx Modbus Gateway Models” at the beginning of this manual for a list of supported fiber types, distances and connectors.
MESR9xx Modbus Gateway Configuration Connections
MESR9xx Modbus Gateways can be configured over the network or via a serial port.
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