Moxa Technologies MGate MB3000 Modbus User manual

MGate MB3000 Modbus Gateway
User’s Manual
Edition 9.1, July 2016
www.moxa.com/product
© 2016 Moxa Inc. All rights reserved.

MGate MB3000 Modbus Gateway
User’s Manual
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
© 2016 Moxa Inc. All rights reserved.
Trademarks
The MOXA logo is a registered trademark of Moxa Inc.
All other trademarks or registered marks in this manual belong to their respective manufacturers.
Disclaimer
Information in this document is subject to change without notice and does not represent a commitment on the part of
Moxa.
Moxa provides this document as is, without warranty of any kind, either expressed or implied, including, but not limited
to, its particular purpose. Moxa reserves the right to make improvements and/or changes to this manual, or to the
products and/or the programs described in this manual, at any time.
Information provided in this manual is intended to be accurate and reliable. However, Moxa assumes no responsibility for
its use, or for any infringements on the rights of third parties that may result from its use.
This product might include unintentional technical or typographical errors. Changes are periodically made to the
information herein to correct such errors, and these changes are incorporated into new editions of the publication.
Technical Support Contact Information
www.moxa.com/support
Moxa Americas
Toll
-free: 1-888-669-2872
Tel:
[phone]
Fax:
[phone]
Moxa China (Shanghai office)
Toll
-free: 800-820-5036
Tel:
[phone]
Fax:
[phone]
Moxa Europe
Tel:
[phone]
Fax: [phone]
Moxa Asia
-Pacific
Tel:
[phone]
Fax: [phone]
Moxa India
Tel:
[phone]
Fax:
[phone]

Table of Contents
1. Introduction ...................................................................................................................................... 1-1
Overview ...........................................................................................................................................1-2
Package Checklist ...............................................................................................................................1-3
Product Features ................................................................................................................................1-3
2. Getting Started.................................................................................................................................. 2-1
Connecting Power ...............................................................................................................................2-2
Connecting Serial Devices....................................................................................................................2-2
RS-485 Termination and Pull High/Low Resistors.............................................................................2-2
Connecting to a Host or the Network .............................................................................................2-3
Installing the Software.................................................................................................................2-3
Mounting the Unit........................................................................................................................2-3
3. Hardware: MB3180 ........................................................................................................................... 3-1
Panel Layout ......................................................................................................................................3-2
LED Indicators....................................................................................................................................3-2
Dimensions ........................................................................................................................................3-3
Jumpers ............................................................................................................................................3-4
DIN-Rail and Wall Mounting .................................................................................................................3-5
Specifications .....................................................................................................................................3-5
4. Hardware: MB3280 ........................................................................................................................... 4-1
Panel Layout ......................................................................................................................................4-2
LED Indicators....................................................................................................................................4-2
Dimensions ........................................................................................................................................4-3
Jumpers ............................................................................................................................................4-4
DIN-Rail and Wall Mounting .................................................................................................................4-5
Specifications .....................................................................................................................................4-5
5. Hardware: MB3480 ........................................................................................................................... 5-1
Panel Layout ......................................................................................................................................5-2
LED Indicators....................................................................................................................................5-2
Dimensions ........................................................................................................................................5-3
Jumpers ............................................................................................................................................5-4
DIN-Rail and Wall Mounting .................................................................................................................5-5
Specifications .....................................................................................................................................5-5
6. Hardware: MB3170, MB3170I ........................................................................................................... 6-1
Panel Layout ......................................................................................................................................6-2
LED Indicators....................................................................................................................................6-2
Dimensions ........................................................................................................................................6-3
Jumpers ............................................................................................................................................6-4
DIN-Rail and Wall Mounting .................................................................................................................6-5
Specifications .....................................................................................................................................6-6
7. Hardware: MB3270, MB3270I ........................................................................................................... 7-1
Panel Layout ......................................................................................................................................7-2
LED Indicators....................................................................................................................................7-2
Dimensions ........................................................................................................................................7-3
Jumpers ............................................................................................................................................7-4
DIN-Rail and Wall Mounting .................................................................................................................7-5
Specifications .....................................................................................................................................7-5
8. Pin Assignments................................................................................................................................ 8-1
DB9 (Male) ........................................................................................................................................ 8-2
Terminal Block (RS-422, RS-485) .........................................................................................................8-2
Power Input, Relay Output...................................................................................................................8-2
9. Typical Applications .......................................................................................................................... 9-1
Ethernet Masters with Multiple Serial Slaves...........................................................................................9-2
Serial Masters with Multiple Ethernet Slaves...........................................................................................9-2
Modbus TCP Masters with ASCII and RTU Slaves ....................................................................................9-3
Serial Master with Serial Slaves over Internet ........................................................................................9-3
10. Configuring the Modbus Gateway.................................................................................................... 10-1
Installing the Software ...................................................................................................................... 10-2
Starting MGate Manager .................................................................................................................... 10-5
Change Language Setting........................................................................................................... 10-6
Connecting to the Unit....................................................................................................................... 10-7
Broadcast Search ...................................................................................................................... 10-7
Specify IP Address..................................................................................................................... 10-8
Modifying the Configuration ............................................................................................................. 10-10
Configure Serial Port for RTU or ASCII, Master or Slave ............................................................... 10-10

What is ProCOM?..................................................................................................................... 10-11
How to Configure ProCOM for the MGate MB3000 ........................................................................ 10-11
Offline Open ........................................................................................................................... 10-14
Configure IP Address and Other Network Settings ....................................................................... 10-15
Configure Serial Communication Parameters............................................................................... 10-16
RTS Toggle ............................................................................................................................. 10-17
Set Up Modbus Routing (Smart Routing) .................................................................................... 10-17
Customize Modbus Settings ...................................................................................................... 10-20
Set Up Priority Control ............................................................................................................. 10-22
Accessible IP........................................................................................................................... 10-23
SNMP..................................................................................................................................... 10-24
Miscellaneous Setup ................................................................................................................ 10-25
Verifying the Location of the Unit...................................................................................................... 10-26
Monitoring Modbus Activity .............................................................................................................. 10-26
Open Traffic Monitor Window .................................................................................................... 10-27
Filter Traffic Information .......................................................................................................... 10-29
Save Log to File ...................................................................................................................... 10-29
Upgrading Firmware........................................................................................................................ 10-30
MXview ......................................................................................................................................... 10-31
MXview for the MGate MB3000 Series ........................................................................................ 10-31
11. Case Studies.................................................................................................................................... 11-1
Introduction ..................................................................................................................................... 11-2
Replace Serial Masters with Ethernet Master(s), Slave IDs are Configurable ............................................. 11-2
Replace Serial Masters with Ethernet Master(s), Slave IDs are Fixed ....................................................... 11-3
Keep Serial Master and Add Ethernet Master(s) .................................................................................... 11-3
Integrate Modbus RTU, ASCII, and TCP at the Same Time ..................................................................... 11-4
A. Modbus Overview.............................................................................................................................. A-1
Introduction .......................................................................................................................................A-1
Devices are Either Masters or Slaves .....................................................................................................A-1
Slaves are Identified by ID...................................................................................................................A-1
Communication is by Request and Response ..........................................................................................A-1
Requests Need a Time Limit.................................................................................................................A-2
Modbus Ethernet vs. Modbus Serial.......................................................................................................A-3
Integrate Modbus Serial and Ethernet with Gateways ..............................................................................A-3

1
1. Introduction
Welcome to the MGate MB3000 line of Modbus gateways. All models feature easy integration of Modbus TCP to
Modbus RTU/ASCII and feature RS-232/422/485 ports for Modbus serial communication. One, two, and
four-port models are available.
This user’s manual applies to the following models:
•MGate MB3180
•MGate MB3280
•MGate MB3480
•MGate MB3170/3170I
•MGate MB3270/3270I
The following topics are covered in this chapter:

Overview

Package Checklist

Product Features

MGate MB3000 Modbus Gateway Introduction
1-2
Overview
The MGate MB3000 is a line of Modbus protocol gateways that provides users with
•seamless integration of Ethernet and serial Modbus devices
•powerful operation modes to handle almost any Modbus application
•Windows utilities for easy setup and traffic monitoring
Seamless integration of Ethernet and serial Modbus devices
Modbus is one of the most popular automation protocols in the world, supporting traditional RS-232/422/485
devices and recently developed Ethernet devices. Many industrial devices, such as PLCs, DCSs, HMIs,
instruments, and meters, use Modbus as their communication standard. However, the Ethernet-based Modbus
protocol is so different from the original serial-based protocols that a communication gateway is needed as a
bridge for integration.
In order to integrate Modbus networks, the MGate MB3000 includes an Ethernet port and up to four serial ports
that support RS-232, RS-422, and RS-485 communication. It automatically and intelligently translates
between Modbus TCP (Ethernet) and Modbus ASCII/RTU (serial) protocols, allowing Ethernet-based PLCs to
control instruments over RS-485 without additional programming or effort.
Powerful operation modes to handle almost any Modbus application
With the Modbus protocol, devices must be clearly defined as either masters or slaves. Unlike other Modbus
gateways, the MGate MB3000’s operation modes allow users to select master or slave operation for each serial
port. Not only does the MB3000 allow Ethernet masters to control serial slaves, it also allows serial masters to
control Ethernet slaves. In addition, the advanced models (MGate MB3170 and MB3270 series) allow both
Ethernet and serial slaves to be controlled by both Ethernet and serial masters. On multiport models, each
serial port’s operation mode is independent of the other ports, so that one port may be configured for slave
mode and another port configured for master mode.
Extra address mapping and exception parameters are provided to ensure that most situations can be handled.
Web console and Windows utilities for easy setup and traffic monitoring
A Windows utility is provided to make configuration and operation of the MGate MB3000 as easy as possible.
The utility automatically connects to all available MGate MB3000 units on the LAN for you. Traffic monitoring
functions help you troubleshoot Modbus communication problems by tracking items such as connection status
and address translation errors. All series provide web console for configuration.

MGate MB3000 Modbus Gateway Introduction
1-3
Package Checklist
All models in the MGate MB3000 line are shipped with the following items:
Standard Accessories
•1 MGate MB3000 Modbus gateway
•Document & software CD
•Quick Installation Guide
•Power adaptor (MB3180 only)
•Product warranty statement
Optional Accessories
•DK-35A: DIN-rail mounting kit (35 mm)
•Mini DB9F-to-TB Adaptor: DB9 female to terminal block adapter
•DR-4524: 45W/2A DIN-rail 24 VDC power supply with universal 85 to 264 VAC input
•DR-75-24: 75W/3.2A DIN-rail 24 VDC power supply with universal 85 to 264 VAC input
•DR-120-24: 120W/5A DIN-rail 24 VDC power supply with 88 to 132 VAC/176 to 264 VAC input by switch
Notify your sales representative if any of the above items is missing or damaged.
Product Features
•Integration of Modbus TCP and Modbus RTU/ASCII networks
•Up to 31 Modbus RTU/ASCII slaves per serial port
•Accessible by up to 16 or 32 TCP master/client devices, connect up to 32 TCP slave/server devices
•Configuration over Ethernet with easy-to-use Windows utility
•10/100M Fast Ethernet with automatic IP setting (DHCP)
•Software-selectable RS-232/485/422 communication
•High-speed serial interface supporting 921.6 Kbps
•Serial port routing by IP address, TCP port, or ID mapping
•Extend transmission distance up to 4 km / 20 km through multimode/single-mode fiber models.
•ProCOM: Virtual Serial Port for flexible Modbus to Modbus TCP communication
(for MB3170/MB3170I/MB3270/MB3270I)
•Supports MXview utility
•Supports SNMP v1.

2
2. Getting Started
This chapter provides basic instructions for installing the MGate MB3000.
The following topics are covered in this chapter:

Connecting Power

Connecting Serial Devices
RS-485 Termination and Pull High/Low Resistors
Connecting to a Host or the Network
Installing the Software
Mounting the Unit

MGate MB3000 Modbus Gateway Getting Started
2-2
Connecting Power
The unit can be powered using the AC adaptor or by connecting a power source to the terminal block,
depending on the model. The following instructions are for the AC adaptor:
1. Plug the connector of the power adapter into the DC-IN jack on the back of the unit.
2. Plug the power adapter into an electrical outlet.
3. Follow these instructions to connect a power source to the terminal block:
4. Loosen or remove the screws on the terminal block.
5. Connect the 12~48 VDC power line to the terminal block.
6. Tighten the connections using the screws on the terminal block.
Note that the unit does not have an on/off switch. It automatically turns on when it receives power. The PWR
LED on the top panel will glow to indicate that the unit is receiving power.
For power terminal block pin assignments, please refer to the hardware reference chapter for your model.
Connecting Serial Devices
The unit’s serial port(s) are located on the back panel. There are two options for connecting serial devices,
depending on the serial interface:
•You may use a DB9-to-DB9 cable to connect a serial device to the unit. Plug one end of the cable into the
port on the unit’s back panel and plug the other end of the cable into the device’s serial port.
•You may make your own customized serial cable to connect a serial device to the unit. For the pin
assignments of the unit’s serial port, please refer to Chapter 10. This information can then be used to
construct your own serial cable.
If you are connecting a RS-485 multidrop network with multiple devices, please note the following:
•All devices that are connected to a single serial port must use the same protocol (i.e., either Modbus RTU
or Modbus ASCII).
•Each master device must get its own port on the unit. If you are connecting a network with both master and
slave devices, the master must be connected to a separate port from the slaves. Furthermore, the master
will only be able to communicate to Modbus TCP slaves, not to the ASCII or RTU slaves that are connected
to a different serial port.
For serial port pin assignments, please refer to the hardware reference chapter for your model.
RS-485 Termination and Pull High/Low Resistors
In some critical RS-485 environments, you may need to add termination resistors to prevent the reflection of
serial signals. When using termination resistors, it is important to set the pull high/low resistors correctly so
that the electrical signal is not corrupted. For each serial port, DIP switches or jumper settings are used to set
the pull high/low resistor values. For all models except the MB3180, a built-in 120 Ω termination resistor can
also be enabled.
To modify the termination and pull high/low resistor settings, please refer to the hardware reference chapter
for your model.
ATTENTION
Do not use the 1 KΩ pull high/low setting on the MGate MB3000 when using the RS
-
232 interface. Doing so will
degrade the RS
-232 signals and reduce the effective communication distance.

MGate MB3000 Modbus Gateway Getting Started
2-3
Connecting to a Host or the Network
A 10/100BaseT Ethernet port is located on the unit’s front panel. This port is used for the unit’s connection to
a host or Ethernet network, as follows:
•For normal operation, use a standard straight-through Ethernet cable to connect the unit to your Modbus
TCP network.
•For initial configuration or for troubleshooting purposes, you may connect the unit directly to a PC. In this
case, use a crossover Ethernet cable to connect the unit to your PC’s Ethernet connector.
The unit’s Link LED will light up to indicate a live Ethernet connection.
For advanced models (MB 3170, MB3170I, MB3270, and MB3270I), two Ethernet ports are provided. One port
can be used to connect to the network, and the other port can be used to connect to another Ethernet device.
Installing the Software
The Windows management utility is installed from the Document and Software CD. Follow the onscreen
instructions after inserting the CD. For additional details, please refer to Chapter 9.
Mounting the Unit
The unit can be placed on a desktop, mounted on the wall, or mounted on a DIN-rail. The MB3180, MB3280,
and MB3480 require optional attachments for DIN-rail mounting. For additional details, please refer to the
hardware reference chapter for your model.

3
3. Hardware: MB3180
This chapter provides hardware information for the MGate MB3180.
The following topics are covered in this chapter:

Panel Layout

LED Indicators

Dimensions

Jumpers

DIN-Rail and Wall Mounting

Specifications

MGate MB3000 Modbus Gateway Hardware: MB3180
3-2
Panel Layout
LED Indicators
Name Color Function
Ready
Red
Steady on: Power is on and unit is booting up.
Blinking: Indicates an IP conflict, or the DHCP or BOOTP server is
not responding properly.
Green Steady on: Power is on and unit is functioning normally.
Blinking: Unit is responding to software Locate function.
Off Power is off, or power error condition exists.
Ethernet
Amber 10 Mbps Ethernet connection.
Green 100 Mbps Ethernet connection.
Off Ethernet cable is disconnected, or has a short.
P1
Amber Serial port is receiving data.
Green Serial port is transmitting data.
Off No data is being transmitted or received through the serial port.

MGate MB3000 Modbus Gateway Hardware: MB3180
3-3
Dimensions

MGate MB3000 Modbus Gateway Hardware: MB3180
3-4
Jumpers
To set the pull high/low resistors to 150 KΩ, leave jumpers JP3 and JP4 open (not shorted). This is the
default setting.
To set the pull high/low resistors to 1 KΩ, short jumpers JP3 and JP4 with jumper caps.
ATTENTION
Do not use the 1 KΩ pull high/low setting on the MGate MB3000 when using the RS
-
232 interface. Doing so will
degrade the RS
-232 signals and reduce the effective communication distance.

MGate MB3000 Modbus Gateway Hardware: MB3180
3-5
DIN-Rail and Wall Mounting
Mounting on a DIN
-rail: Attach the DIN-rail accessories and latch the unit onto the DIN-
rail as shown. The
DIN
-rail kit is ordered separately.
Mounting on the wall: Place two screws in the wall and slide the unit onto the screws as shown. The head of
each screw 6.5 mm or less in diameter, and the shaft should be 3 mm or less in diameter. Make sure to leave
about 2 mm of space between the head and
the wall.
Specifications
LAN
Ethernet
10/100 Mbps, RJ45, Auto MDI/MDIX
Protection
Built
-in 1.5 kV magnetic isolation
Serial Interface
Interface
RS
-232/422/485
No. of Ports
1 port
Connector
Type
DB9
(male)
Signals
RS
-232:
TxD, RxD, RTS, CTS,
DTR, DSR, DCD, GND
RS
-422:
Tx+, Tx
-, Rx+, Rx-, GND
RS
-485 (2-wire):
Data
+, Data-, GND
RS
-485 (4-wire)
Tx+, Tx
-, Rx+, Rx-, GND
Serial Line Protection
15
kV ESD for all signals
RS
-485 Data Direction
Patented ADDC™
Serial Communication Parameters
Parity
None, Even, Odd, Space, Mark
Data
Bits
7, 8
Stop
Bits
1, 2
Flow Control
RTS/CTS
Transmission
Speed
50 bps to 921.6 Kbps
Software Features
Operation Mode
RTU Slave, RTU Master, ASCII Slave, ASCII Master
Utilities
MGate Manager
Multi
-Masters and
Multi
-Request
16 simultaneous TCP masters, 32 simultaneous requests for each TCP
master

MGate MB3000 Modbus Gateway Hardware: MB3180
3-6
Power Requirements
Power Input
12 to 48 V
DC
Power Connector
Power jack
Power Consumption
200 mA@12 VDC, 60 mA@48 VDC
Environment
al Limits
Operating
Temperature
0 to
60°C (32 to 140°F)
Storage Temperature
-
40 to 85°C (-40 to 185°F)
Ambient Relative Humidity:
5 to 95% (non
-condensing)
Altitude:
Up to 2000 m (795 hPa)
; higher altitudes on demand
Note: Please contact Moxa
if you require products guaranteed to function properly at higher altitudes.
Standards and Certifications
Safety:
UL 60950
-1, EN 60950-1
EMC:
CE, FCC
EMI:
EN 55022 Class A, FCC Part 15 Subpart B Class A
EMS:
EN 55024,
EN 61000
-4-2 (ESD) Level 2,
EN 61000
-4-3 (RS) Level 2,
EN 61000
-4-4 (EFT) Level 2,
EN 61000
-4-5 (Surge) Level 2,
EN 61000
-4-6 (CS) Level 2,
EN 61000
-4-8 (PFMF) Level 1,
EN 61000
-4-11
Reliability
MTBF (mean time between
failures):
MGate M3180: 628,376 hrs
Warranty
Period
5
years

4
4. Hardware: MB3280
This chapter provides hardware information for the MGate MB3280.
The following topics are covered in this chapter:

Panel Layout

LED Indicators

Dimensions

Jumpers

DIN-Rail and Wall Mounting

Specifications

MGate MB3000 Modbus Gateway Hardware: MB3280
4-2
Panel Layout
LED Indicators
Name Color Function
Ready
Red
Steady on: Power is on and unit is booting up.
Blinking: Indicates an IP conflict, or the DHCP or BOOTP server is
not responding properly.
Green Steady on: Power is on and unit is functioning normally.
Blinking: Unit is responding to software Locate function.
Off Power is off, or power error condition exists.
Ethernet
Amber 10 Mbps Ethernet connection.
Green 100 Mbps Ethernet connection.
Off Ethernet cable is disconnected, or has a short.
P1/P2
Amber Serial port is receiving data.
Green Serial port is transmitting data.
Off No data is being transmitted or received through the serial port.

MGate MB3000 Modbus Gateway Hardware: MB3280
4-3
Dimensions

MGate MB3000 Modbus Gateway Hardware: MB3280
4-4
Jumpers
To add a 120 Ω termination resistor, set switch 3 on the port’s assigned DIP switch to ON; set switch 3 to
OFF (the default setting) to disable the termination resistor.
To set the pull high/low resistors to 150 KΩ, set switches 1 and 2 on the port’s assigned DIP switch to OFF.
This is the default setting.
To set the pull high/low resistors to 1 KΩ, set switches 1 and 2 on the port’s assigned DIP switch to ON.
Switch 4 on the port's assigned DIP switch is reserved.
ATTENTION
Do not use the 1 KΩ pull high/low setting on the MGate MB3000 when using the RS
-
232 interface. Doing so will
degrade the RS
-232 signals and reduce the effective communication distance.