Campbell Scientific CR9000X Measurement and Control System - Manual (Page 18)

Quick Start
QS1.6.1 IP Port Setup Tips
If you are hooking up one or more CR9000Xs on to a Local Area
Network, we recommend that you obtain from your IT department a
value for the SubNet mask and a fixed range of IP addresses for the(se)
CR9000X(s). This will ensure that you are operating within the
requirements set by your IT department, and should eliminate conflicts with
other Ethernet devices on your LAN. No two devices may share an IP
address.
Many Networks are configured to provide dynamic IP addressing (every
time you log onto the Network, your PC is assigned a new IP address). If
your computer is set-up for Dynamic IP addressing, when it is booted up
without being connected to your LAN, its IP address will be set to
000.000.000.000. This setting disables the IP port and network routing for
your computer; i.e. you will not be able to communicate with the
CR9000X. If the computer is booted while connected to the LAN and
receives an IP address, this address should remain in effect until the
computer is rebooted. You can determine whether or not your PC is set-up
for Dynamic Addressing, as well as the current IP address and Subnet Mask
settings for the computer, by going to your Control Panel: Control
Panel/Network Connections/Local Area Network/Properties/ scroll to
Internet Protocol and click on Properties. If "Obtain an IP address
automatically" is clicked on, then your PC is set-up for Dynamic IP
addressing. If the PC was booted up without being connected to the LAN,
remove this selection and enter a IP address and mask.
See Section QS1.6.1.1 Subnet Mask and IP Settings for more on IP
Address and Mask settings.
It should be noted that the CR9000X requires a static IP address. If the
CR9000X will be hooked up to a LAN, this static IP address should be
provided by the IT department. Although the CR9000X may have left
the manufacturer with an IP address and Subnet Mask, these values should
be changed for communications on your LAN.
If you are communicating with the CR9000X using a computer that is never
hooked up to a Network, you can easily choose the Mask and IP addresses
for the CR9000X and the PC. The same mask should be used for both the
CR9000X and the PC. An example of a good Mask setting is
255.255.255.0. Using this Mask setting, the first three bytes of the PC's and
the CR9000X's IP addresses would need to be set to identical values while
the fourth byte could be set to anything from 0 to 255 (example: PC IP
address set to 223.240.0.1 and the CR9000X set to 223.240.0.2). After
changing the computer's IP port settings, you will need to re-boot before the
new settings will be activated. The PC's and CR9000X's IP addresses
cannot be identical.
QS-10