326 Chapter 5
Programming Fundamentals
Using the LAN to Control the Instrument
Programming Fundamentals
Common Problems After a Connection is Made
This section describes common problems you may encounter when
using the instrument on a LAN. It assumes you have been able to
connect to the instrument in the past. If this is not so, refer to the
previous sections first.
NOTE Pressing Preset does not affect LAN settings, but pressing System,
Restore Sys Defaults
will reset to the original factory defaults. You will
then have to re-set the instrument IP address and other LAN settings
in System, Config I/O.
NOTE Remember that in any type of programming using LAN you should
avoid constantly opening and closing connections. This uses up
processing resources, adds to your system overhead, and can cause
problems with asynchronous implementation of successive commands.
When you are sending the instrument multiple commands: open the
connection, send all the commands, and close the connection.
Cannot connect to the analyzer
• If you suspect a bad LAN connection between your computer and
instrument, you can verify the network connection by using the ping
command described later in this chapter or another similar echo
request utility.
• If a bad connection is revealed, try the following solutions:
— Make sure the instrument is turned on.
— Check the physical connection to the LAN.
— Make sure the internet (IP) Address of the instrument is set up
correctly in the LAN port setup menu. (Press
System, Config I/O, IP
Address
.)
— When connecting to your instrument over a closed network
(directly through a hub or crossover cable) it may help to set the
instrument to its default settings for subnet mask and gateway.
(subnet mask: 255.255.0.0, gateway 0.0.0.0)
— If the instrument and the computer are on different networks or
subnets, make sure the gateway address and subnet mask values
are set correctly.
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