User`s guide

Programming Your Instruments

Addressing Instruments

By default, the LAN Client supports both protocols by automatically detecting

the protocol the server is using. When a VISA

viOpen or SICL iopen call is

performed, the LAN Client driver first tries to connect using the SICL-LAN

protocol. If that fails, the driver will try to connect using the VXI-11 protocol.

If you want to control the protocol used, you can configure more than one

LAN Client interface and set each interface to a different protocol. The

protocol used will then depend on the interface you are connecting through.

In VISA, the protocol used is determined by the configuration settings and

cannot be changed programatically. In SICL, the programmer can override

the configuration settings by specifying the protocol in the

iopen string.

Example: Using Network Protocols

Some examples using VXI-11 and SICL-LAN protocol follow. Note that SICL

names are case-sensitive.

! iopen("lan[machineName]:gpib0,1") will use the configured

default protocol. If AUTO is configured, SICL-LAN protocol will be

attempted. If that is not supported, VXI-11 protocol will be used.

! iopen("lan;auto[machineName]:gpib0,1") will

automatically select the protocol (SICL-LAN if available and VXI-11

otherwise.)

! iopen("lan;sicl-lan[machineName]:gpib0,1") will use

SICL-LAN protocol.

! iopen("lan;vxi-11[machineName]:gpib0,1") will use

VXI-11 protocol.

! The TCPIP LAN Client also supports TCP/IP socket reads and

writes. To open a socket session, use

iopen("lan,socketNbr[machineName]"). For example,

iopen("lan,7777[machineName]") will open a socket

connection for socket number 7777 on '

machineName'.