Siemens SIMATIC Field PG P4 Manual page 139

Restore CD
The Restore CD restores your system partition or your entire harddisk to the
delivery state in the event of an error. The CD contains the image files required for
this procedure and you can boot from the CD. In addition, you can create a Start
diskette, which enables you to perform the restoration via networks.
ROM
ROM (Read Only Memory) is a non-volatile memory in which every memory
location can be addressed individually. They contain factory set programs and data
that are not lost in the event of a power failure.
RS-232 Interface
The RS-232 interface is a standardized interface for data transmission. Printers,
modems and other hardware modules can be connected to a RS-232 interface.
RTC
Real Time Clock
S
SCSI Interface
Small Computer System Interface. Interface for connecting SCSI devices (hard
disk drives, CD-ROM drives).
Serial Interface
Data is transmitted one bit at a time via a serial interface (port); serial interfaces
are therefore slower than parallel interfaces.
SETUP
A program in which information about the device configuration (that is, the
configuration of the hardware on the programming device) is defined. The device
configuration of the programming device is preset with defaults. Changes must
therefore be entered in the SETUP if a memory extension, new modules, or a new
drive are added to the hardware configuration.
SIMATIC S5 Memory Submodules
Memory submodules for SIMATIC S5 which are programmed with the PG and can
be plugged into an S5 programmable logic controller.
SIMATIC Field PG P4 Manual
A5E00180080-04
Glossary
Glossary-13