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ROC827 Instruction Manual
Issued Mar-06 Glossary A-7
R (continued)
RS-232
Serial Communications Protocol using three or more signal lines, intended for short
distances. Also referred to as the EIA-232 standard.
RS-422
Serial Communications Protocol using four signal lines. Also referred to as the EIA-422
standard.
RS-485
Serial Communications Protocol requiring only two signal lines. Can allow up to 32
devices to be connected together in a daisy-chained fashion. Also referred to as the EIA-
485 standard.
RX or RXD
Received Data communications signal.
S
SAMA
Scientific Apparatus Maker’s Association.
Script
An uncompiled text file (such as keystrokes for a macro) that a program interprets in
order to perform certain functions. Typically, the end user can easily create or edit scripts
to customize the software.
Soft Points
A type of ROC point with generic parameters that can be configured to hold data as
desired by the user.
SP
Setpoint, or Static Pressure.
SPI
Slow Pulse Input.
SPK
Speaker.
SRAM
Static Random Access Memory. Stores data as long as power is applied; typically backed
up by a lithium battery or supercapacitor.
SRBX
Spontaneous Report-By-Exception. SRBX always refers to Spontaneous RBX in which
the ROC contacts the host to report an alarm condition.
SVA
Signal Value Analog. Stored in the Results Register, it is the analog value that is passed
between functions in an FST.
SVD
Signal Value Discrete. Stored in the Compare Flag, it is the discrete value that is passed
down the sequence of functions in an FST.
System
Variables
Configured parameters that describe the ROC; set using ROCLINK software.
T
T/C
Thermocouple Input.
TCP/IP
Transmission Control Protocol/Internet Protocol.
TDI
Time Duration Input.
TDO
Time Duration Output.
Tf
Flowing temperature.
TLP
Type (of point), Logical (or point) number, and Parameter number.
TX or TXD
Transmitted Data communications signal.
Turbine meter
A device used to measure flow rate and other parameters.
U
Upload
Send data, a file, or a program from the ROC to a PC or other host.
V-Z
V
Volts.