Lenze Controller-based Automation - Manual (Page 10)

1 About this documentation
1.3 Terminology used
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Lenze · Controller-based Automation - Visualisation · System Manual · DMS 1.5 EN · 04/2014 · TD17
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ST ST allows a more structured programming than IL and therefore replaces IL more
and more. Many software developers continue programming with IL because of
the increased memory requirements of the ST programs (after compilation).
When using smaller PLCs, the memory limits will be reached sooner in the event
of increased memory requirements.
Windows® operating systems
Windows® CE
The Windows® CE operating system (abbreviation: WinCE) is a resource-saving
variant of Microsoft® Windows® for PDA and embedded systems.
Windows® CE uses a different Microsoft® Windows® kernel. Therefore
conventional Windows® programs do not run under Windows® CE.
Windows® CE supports the processor architectures Intel x86, MIPS, ARM, and
Hitachi SuperH.
Windows® XP Windows® XP is an operating system for Microsoft® PCs. A "Home" and a
"Professional" version are available. Windows® XP is the technical successor of
Windows® 2000 with Windows® NT® operating system kernel. Furthermore,
Windows® XP has replaced Windows® Me of the MS-DOS line in the "Home
Edition" version as product for home and private users.
The "Professional" version is used in industrial applications. This version contains
functions such as remote control, file encryption (EFS), central maintenance by
means of guidelines or the use of several processors.
Windows® XP Embedded Windows® XP Embedded is based on Windows® XP Professional, but has a
modular (component-based) structure.
Like this, IPC manufacturers can only install the Windows® XP elements really
required on their IPC to save resources.
• Certainly, a Windows® XP Embedded installation is always bigger than a
Windows® CE installation, but it is much smaller than a Windows® XP full
version. Thus, Windows® XP Embedded combines the advantages of a small
system which can be used on Industrial PCs without a hard disk, with the
advantages that a Windows® XP system offers compared to Windows® CE.
• Windows® XP Embedded is equipped with a so-called "write" filter. In this
way, individual files (FBWF: File-Based Write Filter) or a whole partition (EWF:
Enhanced Write Filter) can be protected against write access. The data to be
written is redirected into the main memory instead of the storage medium
(e.g. CF card).
• After a restart, the system will be in the original state again. This protects the
system against unintended changes. Furthermore, the "write" filter positively
affects the service life of the memory card since the number of real accesses
can be clearly reduced.
Term Meaning