iET PRS-330 series, Operation Manual, Page: 37 / 67

PRS-330 Series
ETHERNET INTERFACE OPTION
25
Chapter 5
ETHERNET INTERFACE
5.1 Ethernet Programming
The PRS-330 comes with Ethernet remote
programming capability accessed through the
RJ45 LAN connector. The connector is a RJ45
industry-standard connector found on the rear
panel. The PRS’s Ethernet connection is based
upon the ICS Ethernet/GPIB/USB to Serial
Interface Card. More information can be found
at www.icselect.com on the 9006 Ethernet/GPIB/
USB to Serial Interface Card.
Ethernet Protocols
The PRS-330 supports Raw Socket and the VXI-
11 protocol which makes it easy to control from
a PC or over the company network.
Raw socket lets you telnet to it and is best
used with direct PC to instrument applications.
VXI-11 operates over Sun RPC and is a more
secure protocol that mimics GPIB control of an
instrument and provides secure communication
over a company network or over the Internet.
Raw Socket Operation
The PRS-330 is always ready for a telnet
connection. When connected, the PRS outputs
its IDN message to con
fi rm the connection.
All raw socket messages are terminated with
a linefeed. Carriage returns and ignored. A
backspace character causes the prior character
to be deleted. Communication timeout is two
minutes and it is recommended that the client
issue a Space-BS sequence on an occasional
basis, less than the timeout, to reset the timeout
counter.
VXI-11 Background
VXI-11 is a communication standard developed
in conjunction with the VISA Speci
fi cation. The
speci fi cation de fi nes a VXI-11.3 interface like the
PRS as an instrument which can be controlled in
Windows systems by programs that make VISA
or SICL library calls and in UNIX/LINUX or
similar operating system with RPC calls. The
VXI-11 speci
fi cation provides an RPCL (Remote
Procedure Call Library) that can be used by
virtually any operating system to control the
PRS. Microsoft’s RPC is not ONC compliant
and cannot be used with a VXI-11.3 device like
the PRS. An VXI-11.3 interface like the PRS will
operate in an LXl system and it supports LXI’s
‘VXI Discovery Method’.
5.2 Network Setup
The PRS-330 includes an internal WebServer
with HTML web pages that can be accessed by a
web browser from any computer. The web pages
let the user quickly change the PRS network
settings. The default IP address is 192.168.1.253
static.
5.3 Ethernet Test Keyboard
To assist the user in setup and communication
the VXI-11kybd program can be used which
includes de
fi ned RPC calls to change the PRS