CONTROL SOLUTIONS Babel Buster 2 Manuale utente
Babel Buster 2
Models BB2-6010-GW, SPX-GW,
SP-GW
Modbus RTU/TCP Non-Mapping
Gateway
Rev. 1.0 – Dec. 2015
© 2015 Control Solutions, Inc.
BB2-6010-GW, SPX-GW, SP-GW User Guide Contents
1 Introduction
1.1 How to Use This Guide
1.2 Overview of Gateway Devices
1.3 Important Safety Notice
1.4 Warranty
2 Connecting Gateway for the First Time
3 Configuring Gateway
3.1 Configuring Gateway with Modbus TCP as Master
3.2 Configuring Gateway with Modbus RTU as Master
3.3 Error Indications
Appendix A Hardware Details
A.1 Wiring
A.2 Front Panel LED Indicators
A.3 RS-485 Line Termination and Bias
A.4 Babel Buster SP DB-9 Connector & DIP Switch
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1.1 How to Use This Guide
This user guide provides background information on how the gateway works, and an overview of the
configuration process. There are several sections for groups of tabs found in the web interface in the
gateway which is accessed by opening a web browser and browsing to the IP address of the device.
You should at least read the overview sections to gain an understanding of how the gateway functions.
You can use the remaining sections as reference material to look up as needed. There is a "Quick Help"
section at the bottom of each web page in the gateway which is generally sufficient for quick reference in
setting up the gateway.
Throughout this user guide, screen shots taken from a Babel Buster BB2-6010-GW are used to illustrate.
However, the same instructions apply to Babel Buster SPX-GW and Babel Buster SP-GW with each
available screen looking nearly identical.
1.2 Overview of Gateway Devices
The Babel Buster BB2-6010-GW, Babel Buster SPX-GW, and Babel Buster SP-GW are non-mapping
Modbus gateways used to simply forward Modbus RTU requests and responses to Modbus TCP, and vice
versa. Most Control Solutions gateways involve mapping, and the gateway itself contains registers or
objects which hold copies of data found in other devices. This intermediate data buffering is what allows
access to the same data from multiple protocols. The non-mapping gateway discussed here does not
contain any of its own registers. It simply forwards whatever request it receives to the other side and
simply repackages and retransmites exactly the same request (regardless of whether it was a correct
request).
The process of "repackaging" the Modbus request or response is illustrated below. The core of a Modbus
data packet is the same for RTU and TCP. It contains a slave address (or unit number), a function code,
and some data. The "data" is most often a starting register number, register count, and register data (if
writing).
If the data packet is being sent via Modbus RTU, the first character transmitted is the slave address, and
the last two characters are a CRC type checksum. If the data packet is being sent via Modbus TCP, there is
a TCP header at the beginning of the packet, and the last byte of that packet is the same slave address or
unit number that would have been sent via RTU. The RTU checksum is not included because Ethernet has
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its own checksum that covers the entire Ethernet transmission.
The process of translating RTU to TCP or vice versa is simply a matter of adding or subtracting TCP header
and RTU checksum. The only configuration required in this type of gateway is to create an association
between RTU slave addresses and TCP IP addresses.
1.3 Important Safety Notice
Proper system design is required for reliable and safe operation of distributed control systems
incorporating any Control Solutions product. It is extremely important for the user and system
designer to consider the effects of loss of power, loss of communications, and failure of
components in the design of any monitoring or control application. This is especially important
where the potential for property damage, personal injury, or loss of life may exist. By using
ANY Control Solutions, Inc., product, the user has agreed to assume all risk and responsibility
for proper system design as well as any consequence for improper system design.
1.4 Warranty
This software and documentation is provided “as is,” without warranty of any kind, either expressed
or implied, including, but not limited to, the implied warranties of fitness or merchantability for a particular
purpose. Control Solutions may make improvements and/or changes in this documentation or in the
product(s) and/or the program(s) described in this documentation at any time. This product could include
software bugs, technical inaccuracies, typographical errors, and the like. Changes are periodically made to
the information herein; these changes may be incorporated in new editions of the software.
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Follow these steps to make the initial connection to the BB2-6010-GW.
(a) Connect power.
Babel Buster BB2-6010-GW: Apply +12 to +24VDC or 24VAC to the terminal marked “POWER”, and
common or ground the the terminal marked “GND”.
Babel Buster SPX-GW: Apply +12 to +24VDC or 24VAC to the terminal marked “POWER”, and common or
ground the the terminal marked “GND”.
Babel Buster SP-GW: Plug power adapter into power connector marked "Power".
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(b) Connect a CAT5 cable between the RJ-45 jack on the gateway, and your network switch or hub. You
cannot connect directly to your PC unless you use a “crossover” cable.
(c) Apply power.
BB2-6010-GW: A blue LED inside the case should light indicating power is present. SPX-GW: A green LED
inside the case close to the RJ45 connector should light indicating power is present. SP-GW: The LED next
to the power connector should light red for a time (but will go out after bootup since this single
LED doubles as communication indicator).
All models: If the link LED on the RJ45 jack is not on, check your Ethernet cable connections. Both link and
activity LEDs on the RJ45 jack will be on solid for a short time during boot-up. The entire bootup process
will take 1-2 minutes, during which time you will not be able to connect with a browser.
Ethernet link LED is the yellow LED integrated into the CAT5 connector on BB2-6010 and SPX, and green
on SP. Ethernet activity LED is the green LED integrated into the CAT5 connector on BB2-6010 and SPX,
and yellow on SP (SP is reverse of other two).
(d) The default IP address as shipped is 10.0.0.101. If your PC is not already on the 10.0.0.0 domain, you
will need to add a route on your PC (XP only). Do this by opening a command prompt. First type “ipconfig”
and note the IP address listed. This is your PC’s IP address. Now type the command
route add 10.0.0.0 mask 255.255.255.0 1.2.3.4
but substitute your PC’s IP address for 1.2.3.4.
This generally works, but if this fails, you will need to temporarily change your computer’s IP address to a
fixed address that starts with 10.0.0. and ends with anything but 101.
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(e) Open your browser, and enter “http://10.0.0.101/” in the address window. You should see a page with
the “Babel Buster BB2-6010” header shown above (or as applicable by model). From this point, you will
find help on each page in the web site contained within the product.
(f) When you click on any of the page tabs such as System Setup, you will be asked for a user name and
password. The default login is user name “system” with password “admin”. You can also log in as “root”
using password “buster”. You must log in as “root” if you will be changing the IP address.
(g) To can change the IP address of the gateway, go to the Network page under System :: Setup. The
following page should appear. Change the IP address, and subnet mask and gateway if applicable. Click
Change IP to save the changes. The process of programming this into Flash takes around half a minute.
The new IP address only takes effect following the next system restart or power cycle.
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(h) Most changes are stored in an XML configuration file in the device’s Flash file system. Only a few are
stored differently, and the IP address is one of those. Normally, clicking Update on any configuration page
only stores that configuration information to a temporary RAM copy of the configuration file. To make your
changes other than IP address permanent, you must click Save on the Config File page (System :: Setup
:: Config File).
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The gateway is configured based on which side is Modbus master. If your Modbus TCP master wants to get
data from Modbus RTU slaves, then configure the gateway with Modbus TCP as master. If your Modbus
RTU master wants to get data from Modbus TCP slaves, then configure the gateway with Modbus RTU as
master.
Regardless of which side is master, one setting that is always required is setting the IP address of the
gateway itself. This was already mentioned in the previous section, but for purposes of reiterating the
steps required to configure the gateway, set the IP address from the Network page as shown here.
3.1 Configuring Gateway with Modbus TCP as Master
If Modbus TCP is master, then from the perspective of your slave RTU devices, the RTU port on this
gateway must also be master. Select master simply by clicking the "Iam the RTU Master" button.
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Select baud rate and parity from the drop down list. Click either Master or Slave buttons to select type of
operation. Enter timing parameters or address as applicable. Click update to register your changes.
IMPORTANT: Set timeout to something long enough for the device(s). If too short, the gateway will not
wait long enough for a response from the Modbus slave device, and the result will be a lot of "no
response" errors from the device even though the device is perfectly functional.
Once you have made all of the appropriate settings on this page, you must go to the Config File page and
click Save to retain these settings past the next power cycle. Refer to the previous section to see where to
find the Config File page.
Configuring the non-mapping gateway with Modbus TCP as master is very simple. You set up the ports and
that is all. You do not need to do anything on the TCP Device Map page - that is for configuring in the
opposite direction.
3.2 Configuring Gateway with Modbus RTU as Master
If your Modbus RTU master wants to view one or more Modbus TCP devices as slaves, then from the
perspective of your RTU master, this gateway must be configured as an RTU slave. Make that selection by
clicking "I am one or more RTU Slaves". You must also select the baud rate that your Modbus RTU master
is using, as well as parity and whether 2 stop bits are required.
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When Modbus RTU is master, you need to tell this gateway what IP address is mapped to which RTU slave
address. If there is a one to one correlation between RTU slave address and Modbus TCP address, enter
them as illustrated below. Here we see RTU slave addresses 1 through 3 corresponding to three different
IP addresses.
The first and last slave address incoming in this example simple mean that RTU slave addresses "1
through 1" correspond to the first IP address on the list, and unit number 1 will be transmitted as unit or
slave ID in the TCP packet. The RTU slave addresses "2 through 2" mean RTU slave address 2 will
translate to the second IP address, but its unit number will be sent as 1. If all of the Modbus TCP devices
expect to see unit number (or slave address) of 1, this mapping is how we instruct the gateway to
translate the slave address. Often a Modbus TCP device will disregard the unit number and it doesn't care
what number you send.
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