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8303460000 Rev A IA672-04-01-Rev. I
Query: A message sent to the power supply which reads back a setting or a
measurement. A query does not change any settings. It may be sent using a
SCPI command or from the web pages
Socket: A universal protocol for messages over LAN. Libraries for writing socket
programs are available for almost all program environments and operating
systems, including industrial PLCs. Two types of sockets are common: TCP
and UDP. These are a lower level protocol upon which VISA is built
SCPI: The Standard Commands for Programmable Instrument is a structure of text-
based commands. For example, the “MEAS:VOLT?” query will return a voltage
measurement from any SCPI compliant instrument that has a volt meter
VISA: The Virtual Instrument Software Architecture is a single interface library for
controlling instruments over many types of communication busses. In an
automation program, a “resource descriptor” string is given for each instrument.
The descriptor defines the instrument including its address and bus type
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