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Bosch Security Systems | 2011-02
Praesideo 3.5 | Installation and User Instructions | EN54-16: 2008 en | 57
14.5 The storage of programs and data (see also
Annex C)
Praesideo is compliant.
14.5.1 All executable code and data necessary to comply
with this European Standard shall be held in memory that is
capable of continuous, unmaintained, reliable operation for
a period of at least 10 years.
All Praesideo programs (executable code and data) are
stored in Flash EEPROM.
14.5.2 For the program, the following requirements shall
apply:
a the program shall be held in non-volatile memory, which
can only be written to at access level 4, and
Firmware (i.e. the program) can be replaced using the File
Transfer Application. Using the File Transfer Application
requires access level 4.
b it shall be possible to identify the version reference or
references of the program at access level 3. The
version reference or references shall be in accordance
with the documentation of 14.2.1.
The version of the firmware of the units that have an LCD
(access level 3) is visible on the units and on the firmware
upgrade web page (that can be accessed via the web
interface of the network controller). The version of the
network controller software is visible on the network
controller display and the web start page. Getting access
to the web interface of the network controller requires
access level 3.
14.5.3 For site-specific data, including emergency
message(s), the following requirements shall apply:
a the alteration of site specific data shall only be possible
at access level 3 or 4;
Alteration of site specific data can only be done via the web
pages offered by the web interface of the network
controller (configuration data) and via the File Transfer
Application (message sets). Getting access to the web
interface of the network controller requires access level 3.
Using the File Transfer Application requires access level 4.
b the alteration of site specific data shall not affect the
structure of the program;
Configuration of the Praesideo system is implemented to
be data-driven and is not part of the program executable.
Also transferring message sets to the Praesideo system is
data-driven and is not part of the program executable.
Therefore alteration of the site specific data does not affect
the structure of the program.
c if stored in read-write memory, there shall be a
mechanism which prevents the memory being written to
during normal operation at access level 1 or 2, such
that its contents are protected during a failure in
program execution;
Site specific data is stored in a Flash EEPROM based file
system. The file system is maintained by the VxWorks Flash
file system manager using a dedicated cyclic Flash-Write
program mechanism.
dIt shall be possible to either read or interrogate the site
specific data at access level 2 or 3, or the site specific
data shall be given a version reference that shall be
updated when each set of alterations is carried out.
Site specific data can be viewed and maintained from the
configuration web interface. Using the web interface
requires access level 3.
e If the site specific data has a version reference, it shall
be possible to identify this at access level 2 or 3.
The site specific data of the Praesideo system does not
have a version reference.
14.6 Monitoring of memory contents Praesideo is compliant.
The contents of the memories containing the site specific
data shall be automatically checked at intervals not
exceeding 1 h. The checking device shall signal a system
fault if a corruption of the memory contents is detected.
The message store is checked every 100 s using checksum
validation. Upon detecting corruption, a fault is reported
indicating a corrupt message store.
The configuration file is checked at intervals not exceeding
1 h using checksum validation. Upon detecting corruption,
a fault is reported indicating a corrupt configuration.
Clause / Requirement Compliance Signature