Rockwell Automation 2706-F11J_F11JC_F21J_F21JC DL50 INSTALLATION MANUAL - Manual (Page 128)

Glossary
Glossary–3
restart
Turning power to the display off,
then on; it is followed automatically
by a check of all parts of the system.
The RESTART button does this
automatically.
RS-232
An EIA standard that specifies
electrical, mechanical, and functional
characteristics for serial binary
communications circuits in a
point-to-point link (two devices
only).
RS-422
An EIA standard that specifies
electrical characteristics of
balanced-voltage digital interface
circuits in a point-to-point link (two
devices only).
RS-485
An EIA standard that specifies
electrical characteristics of
balanced-voltage digital interface
circuits in a multi-point link.
S
self-test
A description of hardware and
firmware that monitors or tests its
own operation and indicates any
faults it can detect.
W
word
A unit of data that contains two bytes
(16 bits)