Siemens SIMATIC IPC647D Operating Instructions Manual page 209

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).
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.
PATA
Interface for hard disk drives and optical drives, with parallel data transmission rate up to 100
Mbps.
PC card
Trademark of the Personal Computer Memory Card International Association (PCMCIA).
Designation for auxiliary cards that conform with PCMCIA specifications. A PC card that has
roughly the size of a credit card can be plugged into a PCMCIA slot. Version 1 specifies
cards of Type I with a thickness of 3.3 millimeters, which are designed mainly for use as
external memory. Version 2 of the PCMCIA specification also defines cards of Type II with a
thickness of 5 mm and cards of Type III with a thickness of 10.5 mm. Type II cards can
realize devices such as modems, fax cards and network interface cards. Type III cards are
equipped with devices that require more space, for example wireless communications
modules, or rotary storage media such as hard disk drives, for example.
SIMATIC IPC647D
Operating Instructions, 01/2014, A5E32996306-AA
Glossary
209