A.3 Glossary
Backup Datas save on media
Base address Seechapter2.1.3“Addressing”→“Plug-inInput
and Output Modules”
Compiler A compiler (from the word compile, to collect)
is a program which translates the source text
(source code) of another program, which is provided
inaspecicprogramminglanguage,intoacharacter
sequence that is understandable for the computer.
CPU (Central Processing Unit) Housing with central unit, the heart of the PCD
Device Device
Download Abb. “DnLD” Save data to PCD
Element e.g.PLCinput,PLCoutput,ag,register,etc.
Linker After the compiler has done its work, the linker
combinestheindividuallestocreateaprogram.
LIO (Local Input Output) Inputs/outputs on the CPU (on-board) or connected
through the I/O bus (not PCD1) on the CPU.
Media Mediareferstoinputs/outputs,ags,registers,etc.
in the PCD family.
Media mapping AssignmentofdigitalandanalogueI/Ovaluestoags
and registers.
Modules Carrier cards for input/output electronics
Module holder CPU, LIO or RIO devices which can accommodate
the aforementioned modules.
Motherboard Main circuit board (CPU)
IL Instruction list ( PCD program code)
NT New technology, means the PCD generation following
therstgeneration
On-board means mounted “on the CPU circuit board”
Parsing A parser is often a type of compiler, which checks
the correct syntax of the program.
PGU ProgrammableUnit→programmingunit
Port Interface designation
Buerbattery Retention of memory content and continuation
of the clock after a power supply shut-down.
PWM PWM stands for Pulse Width Modulation. Pulse width
modulation works with a constant pulse rate and
a constant pulse amplitude, only the pulse width is
variable. Because the pulse rate is constant, but the
pulse width changes, the pulse duty factor changes.
With a PWM output, it is possible to output analog
values without expensive A / D converters.
Restore Saved datas load from media
Resources In this case inputs or outputs,
RIO (Remote Input Output) Inputs/outputs on the CPU (on-board) or connected
through the I/O bus on the CPU.
Slot Slot for plug-in