Glossary - Siemens SIMATIC HMI IPC677C Operating Instructions Manual

Glossary

Automation system (AS)
The programmable logical controllers (PLC) of the SIMATIC S7 system consist of a central
controller, one or more CPUs, and various I/O modules.
Backup
Duplicate of a program, data carrier or database, used either for archiving purposes or for
the protection of vital and non-replaceable data against loss when the working copy is
corrupted. Some applications automatically generate backup copies of data files, and
manage both the current and the previous versions on the hard disk.
BEEP code
If the BIOS detects a boot error, it outputs an audible warning based on the current test
result
Booting
Start or restart of the computer. During booting the operating system is transferred from the
system data carrier to the work memory.
Cache
High-speed access buffer for interim storage (buffering) of requested data.
CE marking
Communauté Européene The CE marking confirms compliance of the product with
corresponding EC Directives, for example, with the EMC Directive.
Chipset
Located on the motherboard, connects the processor with the RAM, the graphic controller,
the PCI bus, and the external interfaces.
Cold start
A start sequence, starting when the computer is switched on. The system usually performs
some basic hardware checks within the cold start sequence, and then loads the operating
system from the hard disk to work memory -> boot
SIMATIC HMI IPC677C
Operating Instructions, 04/2013, A5E02722710-04
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