PRS-300 Series
ETHERNET INTERFACE OPTION
15
Chapter 5
ETHERNET INTERFACE OPTION
5.1 Ethernet Programming
PRS units, with Ethernet interface op-
tion, come 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 supports Raw Socket and the
VXI-11 protocol which makes it easy to con-
trol 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 is always ready for a telnet con-
nection. When connected, the PRS outputs
its IDN message to confirm 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 min-
utes 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 devel-
oped 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 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 com-
munication the VXI-11kybd program
can be used which includes defined RPC
calls to change the PRS network settings.
VXI-11 Keyboard Control Program provides
interactive control of VXI-11 instruments from
the computer keyboard without having to write a
program. The VXI-11 Keyboard program is the
Summary of Contents for PRS-300 Series
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