CONTROL SOLUTIONS Babel Buster 3 BB3-6101-GW User manual

User Guide
Babel Buster 3
Model BB3-6101-GW
Model MX-61-GW
Modbus TCP to RTU
Transparent Gateway
Re . 1.0 – April 2021
© 2021 Control Solutions, Inc.
User Guide Contents
1 Introduction
1.1 How to Use This Guide
1.2 Important Safet Notice
1.3 Warrant
2 Connecting Gatewa for the First Time
2.1 Where to Start
2.2 Overview of Model BB3-6101-GW/MX-61-GW
2.2.1 Application of the BB3-6101-GW/MX-61-GW
2.2.2 How RTU Translates to TCP or Vice Versa
2.3 What is New in Model BB3-6101/MX-61
2.4 Connectors and Indicators
2.5 Opening the Web User Interface
3 S stem Configuration and Resources
3.1 Using the File Manager
3.1.1 Load, Save, Create XML Configuration File
3.1.2 Select Startup Configuration
3.1.3 Delete a File
3.1.4 Clear Configuration
3.2 Configuration Files and Restoring Default Settings
3.3 Network Configuration
3.3.1 IPv4, IPv6 Settings
3.3.2 NTP Time Server Settings
3.3.3 Port Settings
3.4 Resource Allocation
3.5 User Login Passwords
4 Accessing RTU Devices from TCP
4.1 Set Mode and Port Parameters
4.2 How It Works
5 Accessing TCP Devices from RTU
5.1 Set Mode and Port Parameters
5.2 Create TCP Device Map
5.3 How It Works
6 Error Counts and Packet Log
6.1 Reviewing Error Counts
6.2 Reviewing TCP Device Status
6.3 Reviewing the Packet Log
Appendix A Hardware Details
A.1 Wiring
A.2 Front Panel LED Indicators
A.3 RS-485 Line Termination and Bias
A.4 Soft Configuration Reset
A.5 Discovering Lost IP Address
A.6 Forced Hard Configuration Reset
A.7 Firmware Update Notes
Appendix B Modbus Reference Information
B.1 Function Codes, Error Codes, and More
Appendix C Trouble Shooting
C.1 Modbus RTU Trouble Shooting
C.2 Modbus TCP Trouble Shooting
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C.3 Wireshark Hardware Requirements
C.4 Example of Using Wireshark
Appendix D SSL Certificates for Secure Web (HTTPS)
D.1 X.509 Auto-Certificate Generation
D.2 External Certificates
D.3 Certificate Generation Script (Linux)
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1. Introduction
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 Sections 2 and , and other sections specific to your intended
use. 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.
1.2 Important Safety Notice
Proper system design is required for re iab e and safe operation of distributed
contro systems incorporating any Contro So utions product. It is extreme y
important for the user and system designer to consider the effects of oss of
power, oss of communications, and fai ure of components in the design of
any monitoring or contro app ication. This is especia y important where the
potentia for property damage, persona injury, or oss of ife may exist. By
using ANY Contro So utions, Inc., product, the user has agreed to assume a
risk and responsibi ity for proper system design as we as any consequence
for improper system design.
1.3 Warranty
This 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 at any time. This documentation could include
technical inaccuracies, typographical errors, and the like. Changes are periodically
made to the information herein; these changes may be made without notice.
Product Warranty: All Control Solutions products are warranted against defects in
materials and workmanship for a period of time from date of shipment from factory as
follows: Two years on non-mechanical parts, one year on mechanical parts (e.g.
relays). Defective units will be repaired or replaced, at manufacturer’s discretion, at no
cost to user except when negligence or improper use has resulted in damage. The
express warranty stated herein is in lieu of all other warranties, express or implied,
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including without limitation any warranties of merchantability or fitness for a particular
purpose and all other warranties are hereby disclaimed and excluded by Control
Solutions, Inc.
Configuration errors made by customer are not covered under warranty. Damage
caused by incorrect electrical connection is not covered under warranty. Removing
circuit boards from their enclosures will void the warranty - the complete product with
all of its original circuit boards and components must be returned for warranty
consideration.
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2. Connecting Gateway for the First Time
2.1 Where to Start
The Babel Buster BB3-6101-GW or MX-61-GW is used to directly route Modbus RTU
messages to Modbus TC and vice versa. This version of gateway does not do any
data translation or remapping of registers, nor does it even look at the data being
transferred. If you are looking for a gateway to translate Modbus to some other
protocol, or need to remap Modbus registers between TC and RTU, then you need to
start by looking for a different model number.
NOTE: There are several versions of BB3-6101, most of which are SNM to Modbus
gateways. It should be noted that SNM is disabled in the BB3-6101-GW because
there is no means of directly routing Modbus to SNM without the mapping found in
the other models of BB3-6101.
Start by getting familiar with this User Guide. Be sure to review the remainder of this
section. Online videos are also available to demonstrate key operations in setting up
the BB3-6101-GW or MX-61-GW.
If you get stuck, you can open a support ticket at https://ticket.csimn.com where
response time is generally 24 hours or less, and often as little as 2 hours, and at no
cost.
NOTE: Screen shots throughout this User Guide illustrate BB3-6101-GW; however, the
screens in the MX-61-GW are identical with the only exception being model number
indicated at the top of the page.
2.2 Overview of Model BB -6101-GW/MX-61-GW
2.2.1 Application of the BB -6101-GW/MX-61-GW
The Babel Buster BB3-6101-GW/MX-61-GW is a non-mapping gateway used to directly
route Modbus RTU messages to Modbus TC and vice versa. This version of gateway
does not do any data translation or remapping of registers, nor does it even look at
the data being transferred.
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Your requirement can be categorized as one or the other of these two options:
• Accessing RTU devices from TC
• Accessing TC devices from RTU
To access RTU devices from TC , you need only set the I address of the gateway, and
set the RTU port parameters such as baud rate. Refer to section 4 in this user guide
for instructions if you will be accessing RTU devices from TC .
To access TC devices from RTU, in addition to setting the I address of the gateway
itself and setting the RTU port parameters, you will need to create a table that maps
I addresses of the TC devices to an RTU addresses. This becomes a lookup table
that the gateway uses to forward RTU requests to the correct TC device. Refer to
section 5 in this user guide for instructions if you will be accessing TC devices from
RTU.
2.2.2 How RTU Translates to TCP or Vice Versa
The Babel Buster BB3-6101-GW and MX-61-GW are non-mapping Modbus gateways
used to simply forward Modbus RTU requests and responses to Modbus TC , 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 by simply
repackaging and retransmitting 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 TC . 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).
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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 TC , there is a TC 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 its own checksum that covers the entire Ethernet transmission.
The process of translating RTU to TC or vice versa is simply a matter of adding or
subtracting TC header and RTU checksum. The only configuration required in this
type of gateway is to create an association between RTU slave addresses and
TC I addresses.
2. What is New in Model BB -6101/MX-61
The BB3-6101 is a significant enhancement over its predecessor, the BB2-6010. The
MX-61 is the equivalent enhancement over its predecessor, the S X. The hardware
includes a faster processor and hardware encryption engine for efficient rendering of
secure web pages. The software includes numerous enhancements.
I v6 support
Secure (HTT S) web server
Faster processor
Added features specific to the application
2.4 Connectors and Indicators
Follow these steps to make the initial connection to the BB3-6101/MX-61.
(a) Connect power. Apply +12VDC to +24VDC or 24VAC to the terminal marked
“ OWER”, and common or ground to one of the terminals marked “GND”.
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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 C unless you use a “crossover”
cable (or your C supports auto-MDX, which many newer laptops do).
(c) Apply power.
A blue LED inside the case should light indicating power is present.
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. Ethernet
activity LED is the green LED integrated into the CAT5 connector.
Refer to Appendix A for additional detail pertaining to connections and indicators as
well as optional internal jumper settings.
2.5 Opening the Web User Interface
The default I address as shipped is 10.0.0.101. Open your browser, and enter
“http://10.0.0.101/” in the address window. You should see a page with the “Babel
Buster 3” header shown below. From this point, you will find help on each page in the
web site contained within the product.
If your C is not already on the 10.0.0.0 domain, and you are unable to connect, you
may need to temporarily change your computer’s I address to a static I address that
starts with 10.0.0. and ends with anything but 101.
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When you click on any of the page tabs such as System, you will be asked for a user
name and password. The only login as shipped is user name “root” with a unique
password generated specifically for your Babel Buster. Your password should be
included on a document included with the gateway, or on a label attached to the
gateway.
If the unique automatically generated password is currently in effect for user "root", it
will be indicated by " assword is default" as shown in the above screen shot. If you
have changed the root password to something of your own making, then this line is
absent.
There is no way to get the BB3-6101/MX-61 to show you what the default root
password is. If you have lost track of it, make a note of the MAC address, and open a
support ticket at https://ticket.csimn.com to request the default root password (you
will need to provide the MAC address in order to obtain the password).
To change the I address of the gateway, go to the Network page under System ::
System Setup. The following page should appear (only top portion illustrated here).
Change the I address, and subnet mask and gateway if applicable. Click Change I to
save the changes. The process of programming this into Flash takes around half a
minute. The new I address only takes effect following the next system restart or
power cycle.
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Most changes are stored in an XML configuration file in the device’s Flash file system.
Only a few are stored differently, and the I 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 I
address permanent, you must select your file, select the Save XML Config File action,
and then click Execute on the File Manager page. Refer to Section 3 for more about
the File Manager.
NOTE: The BB3-6101-GW and MX-61-GW require rather minimal configuration
compared to mapping gateways. In some cases, you might not need any configuration
file at all. Refer to sections 4 and 5 as applicable for your need.
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3. System Configuration and Resources
3.1 Using the File Manager
The File Manager page is probably one of the most important pages to know about.
Among other things, this is where you tell the gateway to save all of the changes you
have made. The various "Update" buttons on the many pages in the web user
interface only copy your configuration from your C's browser to temporary memory in
the gateway. To retain those changes indefinitely (i.e. through restart or power cycle),
you need to tell the gateway to save those changes in a configuration file.
The configuration files are stored in non-volatile (Flash) memory. The process of
reprogramming the Flash takes a little time. It would be cumbersome to rewrite that
file every time you made a minor change. Therefore, in the interest of being more
responsive, and in the interest of extending the life of the Flash, configuration is only
saved to Flash when you direct it to do so.
The File Manager is used primarily to manage your XML configuration files, but you can
also upload SSL certificates here.
NOTE Most Babel Buster gateways include a significant amount of configuration and
the gateway has little use without the content of an XML file. The BB3-6101-GW and
MX-61-GW are a rare exception depending on mode of operation. If using this gateway
to access RTU devices from TC , then no XML file is necessary. The only settings are
mode and port settings (e.g. baud rate) and these settings are saved in non-volatile
configuration memory separate from XML file storage. If you are accessing TC
devices from RTU, then you need to create a TC Device Map, and this map must be
saved in the XML configuration file.
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The File Directory is a list of files that are currently stored in the Babel Buster's Flash
file system. To filter files by type, select a type from the Filtered by list, and click Filter.
File type filters are as follows:
*.xml XML configuration files
*.pem SSL certificates
*.* Display all files
There are several file related actions you may take. To take action with a certain file,
select that file from the File Directory list, and click Select. That file should now show
up in the Selected File window.
Once a file has been selected, choose your action from the Action list, and
click Execute.
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You must use the Select button to populate the Selected File window prior to executing
any action from the list. Choose a file from the drop down list that shows all available
files, then click the Select button. You may then act on that file.
You do not need to use the Select button to simply View a file. Clicking View will cause
your browser to display the file chosen from the drop down list.
Upload File To upload a file from your C to this gateway, use the Browse button to
find the file on your C, open the file in the C's file dialog box, and then click Upload.
NOTE: If you get a "File upload error: -1" message, click the browser's "back" button,
then simply click the View button to view any file (does not matter which file), and
then click browser's "back" button again to return to this page. This gets the browser
and HTT server back in sync, and this requirement generally happens only once
following power-up.
Restart To restart the gateway, check Confirm and click Restart. This is a hard reset
that will accomplish the same thing as a power cycle without physically disconnecting
and reconnecting power.
3.1.1 Load, Save, Create XML Configuration File
NOTE: Configuration files from a BB2-6010-GW or S X-GW can be loaded into the
BB3-6101-GW or MX-61-GW, but will be saved in a new format when saved.
NOTE: The only thing saved in the XML file for a BB3-6101-GW or MX-61-GW is
the TC Device Maps. RTU port settings are saved in non-volatile configuration
memory in this model gateway. Therefore, if you are not using the TC Device
Mapping, you have no need for any XML files.
Load XML Config File The configuration file shown in the "Boot configuration"
window will be loaded automatically at startup. If you have uploaded a new
configuration file and wish to use it without restarting, select that file (choose from
list, click Select), select this action, and click Execute.
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Save XML Config File Any time you have made configuration changes that you want
to retain as permanent, you need to come here, select the file from the directory list,
and execute this Save action.
Create New XML Config File You have the option to create a totally new
configuration file. This is often suitable if you started with an existing configuration,
made changes, and want to save your changes without replacing the original
configuration. To create a new file, rather than selecting a file from the directory list,
simply type a new name into the Selected file window. The name cannot contain
spaces or special characters, and be sure to use the correct file suffix. Enter the name
and execute this action.
3.1.2 Select Startup Configuration
Select Boot Auto-Config File This is where you tell the Babel Buster what
configuration to automatically load upon startup. To set the Boot configuration, select
the XML file from the list, and execute this action. The name of the startup file, along
with a few other important things like the gateway's own I address, are stored in a
different area of Flash that is not part of the file system.
When selecting a new Boot configuration file, it is a good idea to select the file, and
execute Load XML Config File. If there are errors, they will be displayed. If there are
errors in the file but you do not fix them, then the gateway will not fully start up the
next time it restarts. The web user interface will be available, but it will not be talking
to Modbus devices.
3.1.3 Delete a File
Remove a file from the Flash file system by selecting it from the list and executing the
Delete Selected File action.
3.1.4 Clear Configuration
Clear All Configuration Execute this action to completely wipe out all configuration.
This includes all Modbus TC Device Maps. This will put you back to a "reset to
factory" condition with the exception that your I address is left unchanged. (See
Appendix A, Section A.6, regarding forced hard configuration reset that includes I
address and root password.) If you want to make the now empty configuration
permanent, select the file that is also selected as Boot configuration, and execute the
Save XML Config File action.
The other means of completely wiping out all saved configuration is to simply delete
the file named as the Boot configuration file, and then restart or power cycle the Babel
Buster. Upon restart, a new empty configuration file will be created automatically
(provided the default file name BootConfig.xml is being used as the boot file - see next
section).
3.2 Configuration Files and Restoring Default Settings
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There is a means of restoring the Babel Buster to "manufacturer's default settings".
First of all, make sure that the Boot configuration file is set to "BootConfig.xml". Then,
after selecting this file as the boot file, delete it. Now restart the gateway. Upon
restart, and upon finding that the boot configuration name is BootConfig.xml, and it
does not exist, the gateway will automatically create one with default parameters. The
automatic creation of a default file will not occur with any other file name.
Manual Editing: It is possible to manually edit the XML file outside of the gateway.
However, doing so is very prone to errors. If there are errors in the XML file, it will not
load successfully on startup. If the configuration does not load on startup, none of the
scanners will begin scanning. Because they are all blocked by configuration failure,
entering new configuration via the web pages will not result in functionality being
restored. You must successfully load a configuration file before the gateway will
become functional. To check for errors, select the file here, select Load XML Config
File, and click Execute. Error messages that would have been discarded by the
automatic loading at startup will now be displayed on an error page if there are any.
Backup Copy of XML Config File To save a copy of the configuration to your C,
select the file and click the View button. Your browser will now display the XML file.
DO NOT do a text copy/paste to try to create an XML file - doing so will result in an
invalid file format that cannot be loaded again. You must use the browser's "save as"
or "save page" function. The browser should default to wanting to save a file with a
.xml suffix. If correctly saved on your C, you should be able to double click on the
saved file and it will result in opening the file automatically in your browser. It was
saved correctly if the browser does not give any error messages when displaying
the XML (which should now look exactly as it did when you first clicked the View
button). Saving the configuration file to your C, and then uploading on a different
device, is a quick and easy way to configure two Babel Busters the same way.
Note about caching: Your browser may cache files. If you view a file, make
configuration changes, save the file, then view the file again, you may see the old file
cached by the browser. To see the updated file, go to "Options" in your browser's
tools menu, and delete temporary Internet files (or delete cache files). Also, if you
upload a file, make changes on your C, and re-upload the same file, the browser may
send the old file. Again, you will need to find the button inside your browser options
that lets you delete the cached files from your C. To upload a configuration file from
your C to the gateway, use the Browse button to find the file on your C, open the
file in the C's file dialog box, and then click Upload.
3.3 Network Configuration
The Network Configuration page is where you set the Babel Buster's I address as well
as a few other important things.
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3.3.1 IPv4, IPv6 Settings
To change the I address(es) of this device, make the applicable entries and click
Apply. The "automatic" selection means DHC . Changes to the I v4 I address will
take effect upon the next system restart.
If I v6 is enabled, I v6 will always have a Link-Local address, plus one configured
address. The configured address will be either the static I address, or an I v6
address obtained from an I v6 DHC server. If no configured address appears, the
DHC server may have been unreachable.
The I v6 static I address window is the configured static address. If "Static" is
selected and a new I address entered as the static address, this new address will not
take effect until the next system restart.
The numbers shown to the right of the I v4 input windows are the actual numbers
currently in use. If static I addresses have been entered but the gateway has not
been restarted yet, these numbers will not be the same.
The place to enter DNS Server I addresses is provided; however, DNS is not used in
this particular gateway. The DNS feature is simply part of the standard network
configuration for Babel Buster 3 gateways in general.
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3.3.2 NTP Time Server Settings
The Babel Buster maintains time and date via SNT services.
NT setup: Enter a primary and secondary I address of NT servers, such as those
found at wwv.nist.gov (go to http://tf.nist.gov/tf-cgi/servers.cgi to find more). Enter
daylight start/end rules, and offset from GMT for both standard and daylight time.
Offset is a negative number in the western hemisphere. Enter an NT update time in
minutes. Do not set NT to update too frequently or you risk being denied service by
the NT server. Click the Set NT button after all settings have been made. The Flash
update will take several seconds. The initial update of local time may take a minute or
two.
Daylight savings time start/end rules consist of "date/time" where the date (m.n.d)
indicates the day when summer time starts or ends, and time (hour:min:sec) is the
current local time when summer time starts/ends. The date portion of the rule is
formatted as follows:
m indicates the month (1 <= m <= 12)
n indicates which week of the month (1 <= n <= 5). 5 = the last week in the
month.
d indicates what day of the week (0 <= d <= 6). 0 = Sunday
For example: Start "4.1.0/02:00:00", end "10.5.0/02:00:00" means summer time
starts at 2am on the first Sunday in April and ends at 2am on last Sunday in October.
That was the old US rule. The new US rule is start "3.2.0/02:00:00" and end
"11.1.0/02:00:00", which is start at 2am on the second Sunday in March, end at 2am
on the first Sunday in November.
Note about time maintained here: Modbus gateway functionality has no use for time
and date. The only time you have a need for valid time and date is when using secure
connections. If you are using a secure web connection and having trouble connecting,
be sure NT is set up here. If using the internally self-generated X.509 certificate for
HTT S, NT is not needed.
3.3.3 Port Settings
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Secure browsing can be enabled here, and non-secure can be disabled. You cannot
disable both, and a forced configuration reset will restore HTT (non-secure) web
browsing. In order to use HTT S, you must first upload the necessary SSL certificates
(see Appendix E) or allow the certificates to be self-generated by explicitly deleting
existing certificates.
IM ORTANT: It is highly recommended that in making the transition from HTT to
HTT S, you enable both until you confirm HTT S is functional. If there is a problem
with the SSL certificates provided for HTT S, then HTT S will not run and you will find
an error message on the "HTT S certificate status" line. If you disable standard
HTT without first verifying that HTT S is functional, you may end up locked out and
will then need to do a forced hard reset (Appendix A.6).
The HTT port for browsing the user interface can be moved away from the default
HTT port 80. Select a different port, click Set orts, and then restart the gateway to
make that new port take effect. Don't forget to append the port number to the
gateway's I address when attempting to browse the web user interface if it has been
moved away from port 80.
The Modbus port to which this device responds as a Modbus TC server is entered
here. The standard port is 502. To enter a non-standard port number, enter that here
and click Set orts to set the Modbus port. The device needs to be restarted after
changing the Modbus TC port.
FT is enabled by default to allow firmware update uploads. It may be optionally
disabled here. Just remember to enable it again before attempting a firmware update.
Any changes to these port numbers or enabling/disabling features requires restarting
the Babel Buster before they will take effect.
3.4 Resource Allocation
Most models of Babel Buster 3 gateways have a Resource Allocation page. Because the
BB3-6101-GW requires minimal resources to function, it always has the maximum
permitted resources already permanently allocated.
Modbus protocol specification permits RTU addresses (or unit numbers in TC ) to be
from 1 to 247 and this full range is supported by the BB3-6101-GW.
Support for up to 120 simultaneous Modbus TC connections (unique I addresses) is
provided by the BB3-6101-GW.
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3.5 User Login Passwords
There is only one default login provided initially, namely the username "root" with a
unique password generated specifically for your particular Babel Buster. This password
is provided to you in either external documentation included with the gateway, or it
may be found on a label attached to the gateway. Network security laws in some
jurisdictions require that Internet connected (or connectable) devices be shipped with
unique default passwords, and the BB3-6101/MX-61 complies with this requirement.
Additional user logins may be created. The privilege level Administrator lets that user
see and change anything. The privilege level Maintenance allows the user to log in and
see (and change) values in the local objects via the Local Objects page, but cannot
access any other pages. The Restricted level has no meaning in the BB3-6101/MX-61
(other than block access to everything) since it does not operate as a user defined
web server.
You also have the option of I filtering. If set, then the user can only access
Babel Buster's web pages from that I address. Leave set to 0.0.0.0 to disable
filtering.
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4. Accessing RTU Devices from TCP
4.1 Set Mode and Port Parameters
Accessing one or more Modbus RTU slaves from TCP with the external Modbus TCP
device acting as client (master) means the gateway needs to act as an RTU master on
the RTU networ . Therefore, select "I act as the RTU master" for mode.
Select the baud rate and parity setting that all of the RTU slaves on the networ are
set for. Set a timeout value. This is the amount of time that the gateway will wait for a
response from an RTU slave before calling it a "no-response" error.
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