Bosch Security Systems | 2004-06 | 9922 141 10371en
Plena Voice Alarm System | Installation and Operating | Configuration en | 48
5.3.3.1 Overview
The supervised functions can be configured with a PC
running the Configuration Software. Using the
Configuration Software, supervision for each function
can be turned ON or OFF. The default settings are
mentioned in table 5.2.
* Can be further configured using the
Configuration Software.
** Depends on position of the 2ch operation switch.
5.3.3.2 Processor supervision
If supervision is enabled (see section 5.3.3), the
processor of the controller is supervised by a watchdog.
If the watchdog receives a reset trigger, the Processor reset
indicator on the front panel of the controller turns ON,
the program memory is checked and the processor
resumes operation within 10 seconds. When the fault is
acknowledged and reset the indicator turns OFF.
5.3.3.3 Network supervision
If network supervision is enabled (see section 5.3.3), all
routers and Remote Control Panels that are connected
to the controller are supervised. Routers and RCPs are
connected to the controller using an RS-485 CAN
interface. If any of the CAN stations fails during the
network check, a network error is reported.
5.3.3.4 Message supervision
If supervision is enabled (see section 5.3.3), the internal
message manager of the controller is supervised. This
message supervision consists of a check-sum mechanism
for the wave player and a pilot tone check for the audio
path.
5.3.3.5 Line supervision
If supervision is enabled (see section 5.3.3), all
loudspeaker lines are supervised, including the
loudspeaker lines of any possibly connected routers.
Line supervision consists of:
• Short-circuit supervision.
• Impedance supervision.
• Short-to-ground supervision.
Short-circuit supervision
If supervision is enabled (see section 5.3.3), the
controller continuously monitors all loudspeaker lines in
the system for short-circuits. If a short-circuit with a load
impedance of < 10 Ω is detected, the line is considered
to be short-circuited. In that case, the line output is shut
down within 200 ms.
Impedance supervision
If supervision is enabled (see section 5.3.3), the
controller measures the impedance of all loudspeaker
lines in the system at regular time intervals (by default,
once every 100 seconds). The measured values are
compared with the reference values (see section 5.3) that
are stored in the controller. If the difference is bigger
than a preset differential accuracy (by default, 15%), the
line is considered faulty.
Note
Supervision is only necessary for systems that
have to comply with the IEC60849 evacuation
standard.
table 5.2: Default supervision settings
Supervised function Default setting See
Processor ON 5.3.3.2.
Network OFF 5.3.3.3
Messages ON 5.3.3.4
Line supervision * ON 5.3.3.5
EMG microphone ON 5.3.3.6
Trigger inputs * OFF 5.3.3.7
Mains power ON 5.3.3.8
Battery power OFF 5.3.3.9
Internal amplifier ON 5.3.3.10
VOX 20 kHz input OFF 5.3.3.11
External amplifier ON/OFF ** 5.3.4
Note
Refer to the Configuration Software Manual
(9922 141 10381) for details about adjusting the
supervision settings.
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