Microplate Barcode Labeler User Guide - Agilent Technologies

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Chapter 3: Installing the VCode
VCode User Guide
About Ethernet networking
Introduction
There is more than one way to set up an Ethernet network. This topic
provides the information you need to decide which connection method
will work best for you.
For help deciding whether to set up an Ethernet or serial network, see
“Choosing between a serial or Ethernet network” on page 34.
Network
requirements
You can use Ethernet cables to make a stand-alone connection between
the computer and a VCode or to connect the VCode to a dedicated lab
automation local area network.
Both methods require that the controlling computer has an available
network card. Most computers come with one Ethernet network card,
and if you want to use this card to communicate with your lab’s general
network (for email, Internet access, and so on), you will need to install
an additional card to communicate with your VCode.
You will also need one or more Ethernet cables to make the physical
connections. If you plan to connect multiple VCodes you will also need
an Ethernet switch to connect the single Ethernet cable attached to your
computer with the multiple Ethernet cables of the VCodes.
About IP addresses
IP address function
The computer’s network card, and each device on the network, must be
assigned a different number, called an IP address. IP addresses allow
computers and devices to be uniquely identified on a network so that
information can be specifically routed to them.
Ways to assign an IP address
There are two ways to assign an IP address:
❑ Statically, by assigning it manually so that it never changes
❑ Dynamically, by automatically assigning a new address every time
the computer or device is turned on.
Dynamic assignment uses DHCP (Dynamic Host Configuration
Protocol) software.
Network card and
VCode IP addresses
It is important to consider separately the IP address of the computer’s
network card, and the IP addresses of VCode and any other devices on
the network.
Computer’s IP address
The network card of the computer that is controlling the VCode on a
small lab automation network always has a static IP address. This is even
the case when the devices are dynamically assigned addresses, because
of the way that the DHCP server works. When the server starts, it reads
an initialization file that points it to the network card through which the
computer will serve addresses. A screenshot of the initialization file is
shown below.