3 Terms, definitions, and conventions ToC Previous Next

3.2 Abbreviations and symbols ToC Previous Next

Symbol Definition
A&E Alarms & Events
ANSI American National Standards Institute
API Application Program Interface
DA Data Access
HDA Historical Data Access
HMI Human-Machine Interface
IEC International Electrotechnical Commission
IP Internet Protocol - RFC 791
ISO International Organization for Standardization
LAN Local Area Network
MES Manufacturing Execution System
NaN “Not a Number”, a unique binary pattern representing an invalid number
(see ANSI/IEEE 754-1985)
NAT Network Address Translation - RFC 2663
UA Unified Architecture
UTC Universal Time Coordinated
XML Extensible Markup Language
CNC Computerized Numerical Control (also referred to as Computer Numerical Control)
ERP Enterprise Resource Planning
PDA/MDA Process Data Acquisitoin / Machine Data Acquisition
PLC Programmable Logic Control
UI User Interface
GUI Graphical User Interface
I/O Input/Output
SCADA Supervisory Control and Data Acquisition

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