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Terms/Abbreviations
AP 1.0 – Siemens Automation Protocol Version 1.0
CL – Computer Link
COM Area – Communications Area
CNC – Computer Numerical Control
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
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