Glossary - TDK-Lambda Genesys Series User Manual

16. GLOSSARY

Auto-IP: This is when the power supply configures it's own settings because they cannot be obtained
using a network server (DHCP). With auto-IP, the power supply will select a random address
in the range of 169.254.xxx.xxx. Also called Link-Local addressing.
Auto-MDIX: An connection that automatically detects either a patch (straight-through) or a cross-over
LAN cable. Either type of LAN cable is acceptable.
Auto-Negotiate: The power supply will automatically choose the fastest speed that the network can support.
The Genesys™ power supply can operate at 10 megabits per second (Mbps) or 100 Mbps
Command: A message sent to the power supply which changes one or more of it's settings. It may be
sent using a SCPI command or from the web pages. No response message is returned, but
an error message may be created.
DHCP: The Dynamic Host Configuration Protocol is a method where the IP address and other
settings are loaded from the network server to the power supply. The IP address and other
settings may change each time the network connection is created.
Hostname:
A unique name for a device on a network. A descriptive name may be created by the
operator. For the default hostname, see section 4.5.
Ethernet:
The most common configuration for a LAN. It includes connection detection and message
collision protection.
IP Address: The Internet Protocol address is a numeric identifier that says where messages are sent to
or received from. It has four numbers, each zero to 255. Example: 10.190.34.17
IVI: The "Interchangeable Virtual Instrument". Specifications which standardize instrument
driver technology. Built upon VISA drivers. IVI has interfaces so any programming language
can use standard calls to COM and DLL libraries.
LAN:
A "Local Area Network" is usually a small group of computers, printers and other devices
connected to share information and services. With a gateway, these devices can also connect
to a Wide Area Network (WAN).
LXI:
"LAN Extensions for Instrumentation". A standard adopted by many test and measurement
companies. To be LXI certified, an instrument must conform to many requirements including
network connectivity, web page operation and software drivers. See www.lxistandard.org
for details.
MAC Address: The Media Access Control address is a identifier for the manufacturer and the instrument.
It is like a serial number and it may be used to configure the LAN connection. It has six
hexadecimal values.
Example: 00:19:f9:00:3e:26
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 it's address and bus type.
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