Glossary-11
Box PC 820 / PC FI45 V2, Manual
A5E00051531-03
ROM
ROM (Read Only Memory) is a memory in which every memory location can be
addressed individually. The stored programs and data are permanently
programmed at the factory before delivery and are not lost in the event of a power
failure.
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 are transmitted one bit at a time via a serial interface (port); they are used
where large distances have to be covered using the minimum amount of cabling.
SETUP (BIOS Setup)
A program in which information about the device configuration (that is, the
configuration of the programming device’s hardware) is defined. The device
configuration of the programming device is preset with defaults. Changes must the-
refore be entered in the SETUP if a memory extension, new modules, or a new
drive are added to the hardware configuration.
SIMATIC S5 Memory Submodule
Memory submodules for SIMATIC S5 that can be written with the programmer and
inserted in an S5 programmable controller.
SIMATIC Memory Cards
Memory submodules in credit-card format for SIMATIC S5 and SIMATIC S7 which
are programmed with the PG 740 PII and can be plugged in an S5 or S7
programmable controller.
SINEC L2 (PROFIBUS)
Bus system on the basis of the PROFIBUS standard. Components of the SIMATIC
S5 and S7 series (for example, programming device, programmable controller,
remote I/O) can be networked directly using SINEC L2.
Glossaryx
Siemens Distributor
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