Ntron ESERV-M12T User manual

ESERV-M12T
Modbus Gateway
User Manual

Table of Contents
i ESERV-M12T (Rev. 1210)
TABLE OF CONT E NTS
INTRODUCTION...................................................................................................................................... 1
About ESERV-M12T Modbus Gateways ................................................................................................................. 1
Modbus Gateway Manager Configuration Software .............................................................................................. 2
ESERV-M12-T MODBUS GATEWAY HARDWARE ........................................................................ 3
Package Checklist .................................................................................................................................................. 3
ESERV-M12T Modbus Gateways Enclosures and Mounting ................................................................................... 3
LED Indicators........................................................................................................................................................ 4
Ethernet Link LED.......................................................................................................................................................4
Ready LED ..................................................................................................................................................................4
Serial Port LEDs..........................................................................................................................................................4
Mode Switch.......................................................................................................................................................... 5
Ethernet Connector ...............................................................................................................................................5
Serial Port Connectors ........................................................................................................................................... 6
Power Connector ................................................................................................................................................... 6
Mounting Hardware ..............................................................................................................................................6
MODBUS GATEWAY SETUP AND CONNECTIONS ........................................................................ 8
Connecting the Power Supply ................................................................................................................................ 8
Connecting ESERV-M12T Modbus Gateways to Modbus networks ........................................................................8
Connecting the ESERV-M12T.....................................................................................................................................9
Connecting ESERV-M12T Modbus Gateways to a Network.................................................................................. 10
Network Connection (10BaseT/100BaseTX)............................................................................................................10
ESERV-M12T Configuration Connections.............................................................................................................. 10
Configuring the ESERV-M12T Modbus Gateway via the Network Connection .......................................................10
Configuring the ESERV-M12T Modbus Gateway on Networks without a DHCP Server ..........................................12
Configuring the ESERV-M12T Modbus Gateway via the Serial Port (Console Mode) .............................................15

Table of Contents
ii ESERV-M12T (Rev. 1210)
ESERV-M12T Modbus Gateway Operational Connections.................................................................................... 16
Using ESERV-M12T Modbus Gateways in Direct IP Mode.......................................................................................16
Initiating a Hardware Reset on the Modbus Gateway.......................................................................................... 17
Reloading Factory Defaults .................................................................................................................................. 17
DESCRIPTION, MODBUS GATEWAY PROPERTIES....................................................................18
Attached.............................................................................................................................................................. 18
Baud Rate ............................................................................................................................................................ 18
Character Timeout............................................................................................................................................... 18
Configuration Files............................................................................................................................................... 18
Data/Parity/Stop ................................................................................................................................................. 18
Default Gateway.................................................................................................................................................. 19
DHCP ................................................................................................................................................................... 19
Firmware Version ................................................................................................................................................ 19
Hardware Version................................................................................................................................................ 19
ID Routing............................................................................................................................................................ 19
IP Address............................................................................................................................................................ 20
Link Status ........................................................................................................................................................... 20
MAC Address ....................................................................................................................................................... 20
Modbus Priority................................................................................................................................................... 20
Modbus Serial Retries.......................................................................................................................................... 21
Modbus ASCII ...................................................................................................................................................... 21
Modbus Message Buffering ................................................................................................................................. 21
Modbus Message Timeout................................................................................................................................... 21
Modbus RTU Message ......................................................................................................................................... 21

Table of Contents
iii ESERV-M12T (Rev. 1210)
Modbus Serial Control ......................................................................................................................................... 21
Modbus TCP Message.......................................................................................................................................... 22
Model .................................................................................................................................................................. 22
Network Mode .................................................................................................................................................... 22
Network Protocols............................................................................................................................................... 22
Password ............................................................................................................................................................. 23
Port# ID Remap.................................................................................................................................................... 23
Serial Interface Modes......................................................................................................................................... 23
Modbus Gateway Name ...................................................................................................................................... 24
Gateway Serial Port Number ............................................................................................................................... 24
Subnet Mask........................................................................................................................................................ 24
TCP (Transmission Control Protocol).................................................................................................................... 25
UPGRADING THE MODBUS GATEWAY FIRMWARE .................................................................26
Downloading Firmware Files................................................................................................................................ 26
Uploading the Firmware to the Modbus Gateway ............................................................................................... 27
DIAGNOSTICS........................................................................................................................................28
Testing a Modbus Gateway Connection............................................................................................................... 28
APPLICATION EXAMPLES .................................................................................................................30
Ethernet Master and Serial Slaves ....................................................................................................................... 30
Serial Masters, IP Slaves ...................................................................................................................................... 38
Identical Hard Coded Slaves................................................................................................................................. 44
Identical Production Lines.................................................................................................................................... 45
Modbus ASCII/RTU Basics.................................................................................................................................... 46

Table of Contents
iv ESERV-M12T (Rev. 1210)
Hints and Tips ...................................................................................................................................................... 46
APPENDICES..........................................................................................................................................47
Appendix A: Default Gateway Settings ................................................................................................................ 48
Appendix B: Product Specifications...................................................................................................................... 50
General Specifications .............................................................................................................................................51
Controls, Indicators and Connector Specifications..................................................................................................53
Serial Interface Specifications..................................................................................................................................54
Fiber Interface Specifications ..................................................................................................................................55
Network Specifications ............................................................................................................................................56
Appendix C: Dimensional Diagrams ..................................................................................................................... 57
Appendix D: Connector Pinout............................................................................................................................. 58
ESERV-M12T Serial Port Pinouts..............................................................................................................................58
Standard Ethernet Cable RJ-45 Pin-out ...................................................................................................................59
GLOSSARY ..............................................................................................................................................60
N-TRON LIMITED WARRANTY ........................................................................................................65

Introduction ESERV-M12T Modbus Gateway
1 ESERV-M12T (Rev. 1210)
INTRODUCTION
Thank you for purchasing an ESERV-M12T Modbus Gateway product! This product has been manufactured to the
highest standards of quality and performance to ensure your complete satisfaction.
Figure 1. An ESERV-M12T Modbus Gateway
ABOUT ESERV-M12T MODBUS GATEWAYS
ESERV-M12T 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. ESERV-M12T Modbus Gateways feature 10BaseT or 100BaseTX
copper network media and fiber optic media options, depending on the model. ESERV-M12T 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.
Model Number
Features
ESERV-M12T
2 PORT, TB, DIN, CU ETHERNET
ESERV-M12T-ST
2 PORT, TB, DIN, FIBER, MULTIMODE, ST

Introduction ESERV-M12T Modbus Gateway
2 ESERV-M12T (Rev. 1210)
ESERV-M12T PRODUCT FEATURES
Two serial ports with pluggable terminal blocks, single Ethernet port)
Multi-interface serial ports
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
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 Modbus Gateway
Manager software
MODBUS GATEWAY MANAGER CONFIGURATION SOFTWARE
The Ethernet Modbus Gateway 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.

Hardware ESERV-M12T Modbus Gateway
3 ESERV-M12T (Rev. 1210)
ESERV-M12-T MODBUS GATEWAY HARDWARE
ESERV-M12T 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
ESERV-M12T Modbus Gateways are shipped with the following items included:
ESERV-M12T Modbus Gateway Module
Quick Start Guide
CD with User Manual, Quick Start Guide and firmware
ESERV-M12T MODBUS GATEWAYS ENCLOSURES AND MOUNTING
Modules are DIN rail mountable.
Figure 2. Front View of an ESERV-M12T Modbus Gateway

Hardware ESERV-M12T Modbus Gateway
4 ESERV-M12T (Rev. 1210)
LED INDICATORS
ESERV-M12T Modbus Gateways have three types of LED indicators: Ethernet Link LEDs, a Ready LED and
Serial Port LEDs.
Figure 3. Ready Ethernet Port LED
ETHERNET LINK LED
The Ethernet Link LED 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 to connect to the network.
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
ESERV-M12T 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

Hardware ESERV-M12T Modbus Gateway
5 ESERV-M12T (Rev. 1210)
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
ESERV-M12T gateway is connected to a standard Ethernet network drop using a straight-through RJ45 (male)
Ethernet cable.
Fiber Optic Connectors
The ESERV-M12T-ST uses a multimode fiber optic network connection with ST style connectors.
Figure 6. ST Connector