Rockwell Automation 1769-HSC Compact High Speed Counter Module - Manual (Page 163)

Rockwell Automation Publication 1769-UM006E-EN-P - July 2013 163
Glossary
removal and insertion under power
(RIUP)
ControlLogix feature that lets a user install or remove a module or RTB while
power is applied.
requested packet interval (RPI) A configured parameter that defines when the module will multicast data.
run mode In this mode, the controller program is executing. Inputs are actively producing
data. Outputs are actively controlled.
sensor A digital or analog transducer (a device such as a limit switch, push button switch,
pressure sensor, or temperature sensor) that generates an electrical signal through
an input circuit to a controller.
single-ended 1) Unbalanced, as when one side is grounded. See unbalanced circuit ( page 163 )
2) Contrasted with differential ( page 159 ).
synchronous 1) In step or in phase, as applied to two or more circuits, devices, or machines. 2)
Contrasted with asynchronous ( page 157 ).
tag A named area of the controller’s memory where data is stored like a variable. For
example, an I/O definition file can contain a tag (definition) for each I/O—with each
I/O definition containing a unique tag name by which the I/O can be addressed.
unbalanced circuit 1) A circuit whose two sides are electrically dissimilar, as when one side is
grounded. 2) Contrasted with balanced circuit ( page 157 ).