90 34410A/11A User’s Guide
3 Remote Interface Configuration
Assigning the LAN IP Address Using Auto–IP
The Auto–IP standard automatically assigns an IP address to the
multimeter when on a network that does not have DHCP servers.
• Changing the Auto–IP setting will cause an automatic LAN reset.
• Auto–IP allocates IP addresses from the link– local address range
(169.254.xxx.xxx).
• From the factory, the Auto–IP setting is enabled.
• The IP address is stored in non–volatile memory, and does not change
when power has been off, after a Factory Reset (*RST) command, or
after an Instrument Preset (SYSTem:PRESet) command.
Setting the LAN IP Address Manually
An Internet Protocol (IP) Address is required for all IP and TCP/IP
communications with the instrument. If DHCP is enabled (factory setting),
the specified static IP address is not used. However, if the DHCP server
fails to assign a valid IP address, or if DHCP and Auto–IP are both off,
the currently configured static IP address will be used.
• Changing the IP address will cause an automatic LAN reset.
• The default IP Address for the multimeter is “169.254.4.10” for the
34410A, and “169.254.4.11” for the 34411A.
• If you are planning to use a static IP address on a Corporate LAN,
contact your network administrator to obtain a fixed IP address to be
used exclusively for your instrument.
NOTE
Dot–notation addresses (“nnn.nnn.nnn.nnn” where “nnn” is a byte value) must be
expressed with care:
Most computers will interpret byte values with leading zeros as octal numbers. For
example, “255.255.020.011” is actually equivalent to decimal “255.255.16.9” not
“255.255.20.11” because the computer will interpret “.020” as “16” expressed in octal, and
“.011” as “9”.
However, the multimeter assumes that all dot–notation addresses are expressed as
decimal byte values and strips all leading zeros from these byte values. Thus, attempting to
set an IP address
of “255.255.020.011” will become “255.255.20.11” (a purely decimal
expression). Be sure to enter the exact expression, “255.255.20.11”, in your computer web
software to address the instrument. To avoid confusion, use only decimal expressions of
byte values (0 to 255), with no leading zeros.
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