Siemens SIMATIC IPC547D, Руководство по эксплуатации

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Glossary
SIMATIC IPC547D
Operating Instructions, 06/2011, A5E03473780-01
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Low-voltage directive
EC Product Safety Directive relating to the safety of products which are operated on low
voltage (50 VAC to 1000 VAC, 70 VDC to 1500 VDC) and not specified in other directives.
Compliance is confirmed by the CE symbol and the EC certificate of conformity.
LPT interface
The LPT interface (Centronics interface) is a parallel interface that can be used to connect a
printer.
Memory card
Memory cards in credit card format. Memory for user programs and parameters, for
example, for programmable modules and CPs.
Module
Modules are plug-in units for PLCs, programming devices or PCs. They are available as
local modules, expansion modules, interfaces or mass storage (Mass storage module).
Module bracket
The module bracket is used to fasten modules and ensure safe contact and transport.
Shocks and vibrations especially affect large, heavy modules. It is therefore recommended
to use the module bracket for this type of module. There are also very short, compact and
light modules on the market. The module bracket was not designed for these modules
because standard fastening is sufficient for them.
Motherboard
The motherboard is the core of the computer. Here, data are processed and stored, and
interfaces and device I/Os are controlled and managed.
Operating system
Generic term which describes all functions for controlling and monitoring user program
execution, distribution of system resources to the user programs and the operating mode in
cooperation with the hardware (for example Windows XP Professional).
Packet writing
The CD-RW is used as a disk medium. The CD can then be read only by packet–writing
compatible software or has to be finalized. Finalization of a CD closes the CD within an
ISO9660 shell. You can still write to the CD-RW several times in spite of finalization. Not all
CD drives can read packet-written CDs . There are restrictions to using this method in
general data transfer.