Siemens 810T manual Terms/Abbreviations

	Terms/Abbreviations
AP 1.0	± Siemens Automation Protocol Version 1.0
CL	±	Computer Link
CNC	±	Computer Numerical Control
COM Area	±	Communications Area
CP	±	Communications Processor Module
DB/DX	± Data block class DB or DX
DPR	± Dual Port Ram (interface between communications processor module and
		COM area)
DW	±	Data Word
FB/FX	± Function block class FB or FX
Fct no.	±	Function number
FMS	±	Flexible Manufacturing System
Frame	± A data block exchanged between two partners written according to defined
		rules
ID	±	Identification
I/O buffer	±	Input/Output buffer
MD	±	Machine Data
MPR	±	Multiport RAM
NC	± Numerical Control (or CNC)
PLC	±	Programmable controller
STEP 5	± The program language STEP 5 is used to write the various automation
		tasks on the SIMATIC S5 programmable controllers. The program can be
		written as a control system flowchart (CSF), a ladder diagram (LAD), a
		statement list (STL) or in GRAPH 5.
SW	±	Software
UI	±	User Interface
UII	±	User Interface Input
UIQ	±	User Interface Output