Glossary
SIMATIC IPC1047
Operating Instructions, 09/2018, A5E45118479-AA
129
Legacy Boot Device
Conventional drives can be used as USB devices.
Legacy USB support
Support of USB devices, e.g. mouse, keyboard, on the USB ports without driver.
License key
The license key represents the electronic license stamp of a license. Siemens provides the
license keys for protected software.
Low-voltage directive
EC Product Safety Directive relating to the safety of products which are operated on low
voltage (50 V AC to 1000 V AC, 70 V DC to 1500 V DC) and not specified in other directives.
Compliance is confirmed by the CE symbol and the EC certificate of conformity.
Module
Modules are plug-in units for PLCs, programming devices or PCs. They are available as
central modules, interface modules, expansion cards 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.
Multi-core CPU
Multi-core processors have multiple cores, which significantly increases the speed of
computing and simultaneous program execution compared to the previous generation of
single-core processors with hyper threading technology.
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.
