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saia-pcd.com
Abbreviations
Abbreviation Written out / Explanation
IR
Infrared
LD
Ladder diagram a method of drawing electrical logic schematics.
A ladder diagram represents a program in ladder logic
MB
The Micro-Browser application allows the visualization and operation of web projects which have been created with
Saia PG5® Web Editor
MID
Measurement Instrument Directive
MTBF
Mean time between failure
OEM
Original equipment manufacturer (OEM) is a term used when one company makes a part or subsystem that is used in
another company‘s end product
OPC
OLE for Process Control (OPC), which stands for Object Linking and Embedding (OLE) for Process Control. The standard
specifies the communication of real-time plant data between control devices from different manufacturers
PB
A Saia PCD program is a tree-like structure of organization blocks which contain the application‘s code. Each block
provides a particular service: cyclical programming (COB), sequential programming (SB), sub-programs (PB), functions
with parameters (FB), and exception routines (XOB)
PGU
ProGramming Unit
This term designates the programming console, but also by extension the port where the console must be connected.
The PGU designates also the protocol used by the programming console.
RC-bus
Internal data bus to connect digital room control devices or extension modules (Remote Control Bus)
RIO
Remote Inout/Output
RTU
Remote Terminal Unit or Remote Telemetry Unit, a microprocessor controlled electronic device
SCADA
Supervisory Control and Data Acquisition
S-IO
The S-IO protocol supports the operation of SBC remote I/O stations
SMTP
Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (e-mail) transmission
SNMP
Simple Network Management Protocol (SNMP) is an „Internet-standard protocol for managing devices on IP networks“.
SNTP
Is known as the Simple Network Time Protocol (SNTP).
It is used in some embedded devices and in applications where high accuracy timing is not required
SNVT
One of the keys to the interoperability of the system is the standardisation of the variables used to describe physical
things to LonWorks. This standards list is maintained by LonMark International and each standard is known as Stan-
dard Network Variable Types (SNVTs, pronounced „sniv-its“)
PLC
A programmable logic controller, PLC or programmable controller is a digital computer used for automation of typical-
ly industrial electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or
light fixtures
SRC
Single Room Controller
STN
A super-twisted nematic display (STN) is a type of monochrome passive-matrix liquid crystal display (LCD)
SUP
Supply air
SW
Software
TCP/IP
The Internet protocol suite is the computer networking model and set of communications protocols used on the
Internet and similar computer networks. It is commonly known as TCP/IP, because its most important protocols, the
Transmission Control Protocol (TCP) and the Internet Protocol (IP)
TFT
A thin-film-transistor liquid-crystal display (TFT LCD) is a variant of a liquid-crystal display (LCD) that uses thin-film
transistor (TFT) technology to improve image qualities such as addressability and contrast
URL
A uniform resource locator (abbreviated URL; also known as a web address, particularly when used with HTTP) is a
specific character string that constitutes a reference to a resource
VAV
Variable Air Volume (VAV) is a type of heating, ventilating, and/or air-conditioning (HVAC) system
VOC
Volatile Organic Compounds
VPN
A virtual private network (VPN) extends a private network across a public network, such as the Internet
WAN
A wide area network (WAN) is a network that covers a broad area (i.e., any telecommunications network that links
across metropolitan, regional, national or international boundaries) using leased telecommunication lines
XOB
A Saia PCD program is a tree-like structure of organization blocks which contain the application‘s code. Each block
provides a particular service: cyclical programming (COB), sequential programming (SB), sub-programs (PB), functions
with parameters (FB), and exception routines (XOB)
Sources: our manuals and
