Commissioning
7.5 Notes on operation
SIMATIC Box PC 627B
52
Operating Instructions, 06/2008, A5E00927393-02
7.5.4
Compact Flash card (optional)
NOTICE
We highly recommend that use use approved SIMATIC Compact Flash cards. Siemens
disclaims any liability for impairment of functions caused by the use of third-party cards.
Setup
A Compact Flash card can be used on-board and in an extra mount. This mount replaces the
otherwise usual hard disk mount and uses the same connector as the optical drive.
Features
The Flash drive with Compact Flash card reacts identically as a standard IDE hard disk
preset as a master. No special driver software is required to operate the Flash drive.
Although the Flash drive reacts like a hard disk superficially, there are restrictions due to the
limited number of write cycles on Flash memory. The service life of a Compact Flash card
depends on the number of write access to the medium - read accesses have no effect.
To maximize the service life of Compact Flash cards, take care that the writing to the cards
is kept to a minimum.
For example, you can do this by ensuring that:
●
Swap files of the operating system and application are not located on the Compact Flash
card.
●
Cyclic writing is avoided.
Operating systems such as MS-DOS and Windows XP Embedded allow this, for example.
The Enhanced Write Filter (EWF) can be used with XP Embedded, for example. This
minimized the number of write accesses to the Flash drive or avoids it entirely.
Flash drive functions
A Flash drive or a Compact Flash card consists of Flash memory chips.
An intelligent controller integrated in the Flash drive manages the Flash memory. This
optimizes the use of the Flash memory to achieve a maximum service life.
The service life of a Flash drive depends in part on the following factors:
●
Type of file
Executable files (*.EXE) are usually only written once and stays at the same storage
location.
●
The number of writes within a given time (the less the better)
Содержание SIMATIC 627B
Страница 10: ...Table of contents SIMATIC Box PC 627B 8 Operating Instructions 06 2008 A5E00927393 02 ...
Страница 30: ...Description 3 7 Design SIMATIC Box PC 627B 28 Operating Instructions 06 2008 A5E00927393 02 ...
Страница 56: ...Commissioning 7 5 Notes on operation SIMATIC Box PC 627B 54 Operating Instructions 06 2008 A5E00927393 02 ...
Страница 140: ...Specifications 14 4 DC power supply SIMATIC Box PC 627B 138 Operating Instructions 06 2008 A5E00927393 02 ...
Страница 220: ...Appendix A 3 Service and support SIMATIC Box PC 627B 218 Operating Instructions 06 2008 A5E00927393 02 ...
Страница 228: ...List of Abbreviations Acronyms C 1 Abbreviations SIMATIC Box PC 627B 226 Operating Instructions 06 2008 A5E00927393 02 ...
Страница 244: ...SIMATIC Industrial PC SIMATIC Box PC 627B Operating Instructions 06 2008 A5E00927393 02 242 ...