B&B Electronics MESR321_SL_ML - Quick Start Guide User Manual
Product overview, Set up network, Set up hardware

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Set Up Network
1
Set Up Hardware
1. Power the device.
2. Connect the top RJ45 or optical connector
to a network drop using a standard network
cable. (The RJ45 ports on the model shown are
interchangeable. One may used for pass-through
Ethernet.)
3. Connect the Serial Device(s).
RS-232 with DB9: straight-through for DCE
device. Null modem for DTE device.
RS-422/485 with terminal blocks.
Product Overview
Power 10 - 48 VDC
If You Wish to Set Up TCP
1. Use included CD to install Vlinx Modbus Gateway
Manager. If Autorun does not start, go to “My
Computer” and select the CD drive. You will see
a Vlinx MESR icon. Double-click it to launch the
installation.
2. To open Vlinx Modbus Gateway Manager: click
Start/Programs/B&B Electronics/Vlinx/Vlinx Modbus
Gateway Manager/Vlinx Serial Server Manager.
If the device does not connect, cycle (unplug-replug)
the power, then try again.
3. To configure via the network, select “Network”.
4. If you know the IP address, select “The device is
at this address,” and type in the IP address. If not,
select “I don’t know the IP address of the device.” Click
Connect.
(Alternative Method: Open a web browser and type
the IP address of the Gateway in the Address Bar.
When the Gateway is found the Login window will
appear.)
2
Install/Setup
“I want DHCP” is preselected to set up the network
using dynamic IP addressing. The Gateway is set
up at the factory to receive an IP assignment from a
DHCP Server.
1. If a DHCP Server is not available on your network,
it will default to 169.254.102.39.
2. If a DHCP server is not available and the default
address does not work on your PC, change your
PC network settings to IP Address: 169.254.102.1,
Subnet Mask: 255.255.0.0, Default Gateway:
169.254.102.100.
If you are not able to use these settings in your
installation, refer to the User’s Manual for directions to
change the Gateway’s TCP/IP settings.
Note: The Vlinx Modbus Gateway Manager
software contains default parameter values that
are common to most Modbus networks.
1. TCP Settings:
“Connect to port” identifies TCP port used in TCP
client mode. Valid range is 1 to 65535. Default is
502. Response timeout is the maximum response time.
Valid range is from 1 to 65535. Default is 100ms.
2. TCP Server Settings:
“Listen on port” identifies TCP port in TCP server
mode. Valid range is from 1 to 65535. Default is
502. “Limit the number of connections” controls
the number of simultaneous TCP clients that can be
connected. Connection Filter Mode options like “allow
everyone,” “allow specific IP address” and “allow a
range of IP addresses” control which TCP clients can
connect.
5. Click “Login”. Password is blank from factory.
No password is necessary to operate the MESR
unit. The Configuration/General page appears.
Mode Switch
Fiber/Ethernet Ports
Male DB9 Port
Terminal Block Port
LEDs