Function; Parameter Sets; Danger Levels; Diagnosis Levels - Siemens OH720 Technical Manual

2BStructure and function
3
18BFunction

3.3 Function

3.3.1 Parameter sets

3.3.2 Danger levels

3.3.3 Diagnosis levels

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Building Technologies
Fire Safety
The detection behavior of the detectors is influenced by the parameter sets, so that
it can be specifically adjusted to the fire phenomena and environmental conditions
to be expected in the environment to be monitored.
All parameter sets are programmed in the detectors. During commissioning, the
optimum parameter set must be selected for the conditions at the place of
installation. On a C-NET detector line, this is carried out at the control panel.
Measured values above a "response threshold" are not the only basis for reaching
a danger level. The smoke density progression is also observed over a longer
period of time and evaluated using algorithms.
Fire detectors can transmit the following danger levels to the control panel:
Danger level Meaning
0 No danger
1 Check situation
2 Warning
3 Alarm
Each fire detector has danger levels 0...3.
The evaluation of the danger level and the decisions to be taken (e.g. activation of
remote transmission) are configured in the relevant control panel.
The point detector monitors most of its functions itself. In particular it monitors the
correct functioning of the microcontroller, temperature sensors, light emitter and
light receiver.
The following diagnosis levels are derived from the different control measurements:
● Normal
● Observe information
● Replacement recommended
● Replacement necessary
● Fault
When a fatal error occurs, which prevents the proper function of the detector, a
fault message is signaled.
Comment
Normal condition
A different parameter set should potentially be
selected (inappropriate application)
Possible danger
Fire
A6V10212047_m_en_--
2015-05-04