Lan Communications - Keithley 2450 Reference Manual

Section 2: General operation Model 2450 Interactive SourceMeter® Instrument Reference Manual
SPE, SPD
When the instrument detects the serial polling enable (SPE) and serial polling disable (SPD) events, it
sends the status byte of the instrument. This contains the serial poll byte of the instrument.
The serial poll byte contains information about internal functions. See the Status model (on page C-1)
for detail. Generally, the serial polling sequence is used by the controller to determine which of
several instruments has requested service with the SRQ line.

LAN communications

You can communicate with the instrument using a local area network (LAN). The LAN interface can
be used to build flexible test systems that include web access. This section provides an overview of
LAN communications for the Model 2450.
When you connect using a LAN, you can use a web browser to access the internal web page of the
instrument and change some of the instrument settings.
The Model 2450 is a LXI version 1.4 Core 2011 compliant instrument that supports TCP/IP and
complies with IEEE Std 802.3 (ethernet LAN). There is one LAN port (located on the rear panel of the
instrument) that supports full connectivity on a 10 Mbps or 100 Mbps network. Speed is automatically
detected.
The Model 2450 also supports Multicast DNS (mDNS) and DNS Service Discovery (DNS-SD), which
are useful on a LAN with no central administration.
Contact your network administrator to confirm your specific network requirements before setting up a
LAN connection.
If you have problems setting up the LAN, see LAN troubleshooting suggestions (on page 2-60).
2-50 2450-901-01 Rev. B/September 2013