Plena Voice Alarm System | en 109
Bosch Security Systems B.V. Installation and Operation manual 9922 141 1037x (V2.16) | V0.6 | 2011.09
The correct execution of the system software by
any microprocessor shall be monitored by internal
self-checking procedures and by an appropriate
monitoring circuit (e.g. "watch dog" circuit)
complying with the following:
a The monitoring circuit and its associated
indication and signalling circuits shall not be
prevented from determining and signalling a
fault condition by the failure of any
microprocessor or associated clock circuits.
Compliant.
b The monitoring circuit shall monitor the
execution of routines associated with the main
program elements (i.e. it shall not be solely
associated with "waiting" or other
"housekeeping" routines).
Compliant. Fault is indicated on the
controller and router. Configuration
must be set up to supervise this.
c In the event of a failure by a microprocessor to
execute its software correctly, the monitoring
circuit shall (in addition to initiating an audible
and visual fault warning) perform as follows:
Compliant. Fault is indicated on the
controller and router. Configuration
must be set up to supervise this.
1 re-initialize the processor and attempt
to restart the program at a suitable
point within 10 s of the occurrence of
the failure. The re-initialisation
procedure shall verify that the contents
of memory, both program and data, are
not corrupted, and
Compliant, both data and program are
checked for the Controller and the
firmware in the routers.
2either
i record that a failure has occurred
(using a system capable of recording a
minimum of 99 failures and re-settable
only by an operation restricted to
authorized servicing personnel) or
ii automatically reset the equipment and
give an audible and visual warning that
an automatic reset has occurred.
Compliant. Fault is indicated on the
controller and router. This function
cannot be switched off.
5.5 Interface with emergency detection
systems
The communication link between the emergency
detection system and the sound system shall be
continuously monitored for faults. This is normally
performed by the control equipment for the
emergency detection system, which gives an
audible and visual indication of a fault in the link
between the two systems.
Compliant, if properly installed using
supervised trigger inputs.
Responsibility of the installer.
Clause / Requirement Compliance Signature
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