
Original — December 1991
UM4.6:CS6003
Glossary-31
Standard Analog Output
A multiplexer point type that receives an analog value from the
data-highway, then converts that value to an analog signal which is sent
to a field device.
Standard Discrete Output
A multiplexer point type that receives a discrete value from the
data-highway, then converts that value to a discrete signal which is sent
to a field device.
STAT Abbreviation: Station
State [See Operating State]
Station (ST, STA, or STAT)
Definition of the valid control modes for a control loop. Possible modes
include manual (MAN), automatic (AUTO), remote setpoint (RSP),
supervisory (SUP), and direct digital control (DDC).
SUP Abbreviation: Supervisory Mode
Supervisory (SUP)
A loop control mode: the control algorithm changes the control output to
minimize the difference between the values of the setpoint and the
process variable. A process computer, a computer program, a unit point,
or a logic control point supplies the setpoint value.
SVA Acronym: Signal Value Analog
SVD Acronym: Signal Value Discrete
SVP Acronym: Signal Value Percent
SVXFR Acronym: Service Transfer
SW Abbreviation: Switch
Synchronous Data Link Communication (SDLC)
A protocol for communications between synchronized devices. The
protocol features bit-level message frames with error checking.
Synchronous Serial Data Adapter (SSDA)
1. An integrated circuit device that provides a bidirectional serial
interface for synchronous data exchange. It contains interface logic for
simultaneously transmitting and receiving standard synchronous
communications characters.
2. In PROVOX, an itegrated circuit (Motorola 6852) that provides
communication between a regulatory controller and an operator station.
When an operator plugs a hand-held tuner into the operator station, the
SSDA also is the interface to the turner.
Sta - S
n
Glossary
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