Rockwell Automation 2711 Standard PanelView Operator Terminal User Manual - Manual (Page 274)

274 Publication 2711-UM014G-EN-P - September 2008
Glossary
controller
A unit, such as a programmable controller or relay panel, that controls
machine or process elements.
cursor keys
Up, down, left, right arrows on the terminal keypad. These keys are
used to move a selection cursor or the active object indicator bar.
DF1
Allen-Bradley communication protocol based on an ANSI X3.28-1976
specification.
download
See upload/download.
DH-485 link
Data Highway 485 link. An Allen-Bradley token-passing carrier-band
link for a local area network.
DH+
™
link
Data Highway Plus link. An Allen-Bradley token-passing baseband
link for a local area network.
DHCP
Dynamic Host Configuration Protocol (DHCP) software allows for
dynamic allocation of addressing information for new attached
devices on a TCP/IP network.
Domain Name
Character string mapping the local domain to the IP address of the
DNS server. See DNS Server.
DNS Server
The domain name server (DNS) converts more convenient host names
into IP addresses. The DNS server is identified by a 32-bit IP address.
EMI
Electromagnetic interference. Any electromagnetic disturbance that
interrupts, obstructs, or otherwise impairs the performance of
electronic equipment.