Siemens FS720 - Page 168

'Detection' task card
Configuring the 'Zone'
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Building Technologies
A6V10210424_j_en_
--
Fire Safety
2018
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08
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29
● 'VDE0833: Danger level(s) first + new fault(s)':
Faults of the detectors are evaluated in addition to the danger levels as criteria
for reaching 'PRE-STAGE' or 'MAIN STAGE', respectively. When a danger
level is reached and an additional danger level and/or a fault is reported, then
'PRE-STAGE' or 'MAIN STAGE', respectively, is reached.
The chronological order of the events is relevant, i.e., the criteria for 'PRE-
STAGE' or 'MAIN STAGE' are only fulfilled if the first the danger level is
reached and then a fault is reported afterwards. Faults that were already
previously reported are not taken into account.
● ' - (none)':
No additional criteria are evaluated for reaching 'PRE-STAGE' or 'MAIN
STAGE', respectively. 'PRE-STAGE' or 'MAIN STAGE' are only reached if the
detectors report the number of danger levels that is set for the properties
'Criteria PRE-STAGE' and 'Criteria MAIN STAGE'.
Example of use
Figure 58: Application example for additional criteria
'Criteria MAIN STAGE': Thus two detectors must report danger level 3 in order for
'MAIN STAGE' to be reached.
Additional criterion: 'VDE0833: Danger level(s) first + new fault(s)'
1. One detector reports danger level 3.
2. One detector of the same 'Zone' reports a fault.
3. The 'Zone' reaches 'MAIN STAGE'.
Two-zone dependency
Behavior with two-zone dependency is similar to that with multi-detector
dependency.
WARNING
Differing settings in the assigned '
Zones
'
Unforeseen behavior in the event of fire
● With two-zone dependency in both assigned 'Zones', select the same setting
for the property '
Additional criteria for PRE
-
/MAIN STAGE
'.
● 'VDE0833: Danger level(s) first + new fault(s)':
'MAIN STAGE' is reached when one of the two assigned 'Zones' is in 'PRE-
STAGE' and a fault is reported in the second 'Zone'.
● 'TRVB S123: Danger level(s) + fault(s) and/or isolation(s)' and 'Fallback to
single detector/zone dependency':
'MAIN STAGE' is reached in the following cases:
– One of the assigned 'Zones' is in 'PRE-STAGE'. A fault and/or isolation is
reported in the second 'Zone'.
– A fault and/or isolation is reported in one of the assigned 'Zones'. The
second 'Zone' reaches 'PRE-STAGE'.
● ' - (none)':
No additional criteria are evaluated for reaching 'PRE-STAGE' or 'MAIN
STAGE', respectively.