Glossary
Glossary-2
SIMATIC Field PG P4 Manual
A5E00180080-04
A
AC
Alternating Current. Current that changes its direction at regular intervals.
Access Protection
Access to the programs and data of a programming device can be protected by
passwords.
Advanced Configuration and Power Interface. Power management specification for
controlling computers’ energy. ACPI enables the operating system to control the
amount of power given to each device connected to the computer.
Advanced Power Management
An application is a program which builds directly on, for example, the
MS-DOS/Windows operating system. Applications on your programming device
are, for example, the STEP 5 Basic package, STEP 7, etc.
ASCII-Editor
With an ASCII editor you can edit text files which are stored in ASCII code.
B
Backup
Duplicate of a program, storage medium or database. Created to backup or to
protect irreplaceable data of working copies as a precaution against corruption or
destruction. Some applications automatically create backup copies, while
managing both the current version as well as the previous version that is stored on
the hard disk drive.
The base memory is a part of the main memory. It is 640 Kbytes for all
programming devices. The size is entered in the SETUP menu under the entry
“System Memory” and is not changed even if the memory is extended.
ACPI
APM
Application
Base Memory
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