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Siemens Standard application AHU CE1P3977en_02
Building Technologies Functions 01.02.2010
5.5.4 Temperatur deviation alarms
– For supply air deviation alarm, a supply air sensor must be available:
Main Index > Configuration > Configuration 1 > Supply tmp sensor = Yes.
– Deviation alarm tmp must be enabled:
Main Index > Configuration > Configuration 2 > Deviation alarm tmp<> No
– For room air deviation alarm, a room or return air sensor must be available:
Main Index > Configuration > Configuration 1 > Room tmp Sensor = Yes.
Setpoint/actual value monitoring of temperature: An alarm is triggered for the fol-
lowing cases when the temperature deviates from the setpoint during a certain pe-
riod:
– Actual value < Min limit.
– Actual value > Setpoint + maximum.
– Actual value < Setpoint – maximum.
– When setpoint – maximum < Min limit, min limit applies as the comparison value.
Main Index > Unit > Temp control > Tmp setpoints > Sply tmp dev alarm
Main Index > Unit > Temp control > Tmp setpoints > Room tmp dev alarm
Parameter Range Function
Alarm 18. Passive
19. Active
Alarm state. Go to settings page for digital alarms. Set all
control-related settings such as alarm delay (default 3600
s).
Min limit 0...99.0 [°C] An alarm is triggered below this temperature.
Maximum deviation 0...99.0 [°C] Maximum allowable deviation between setpoint and actual
value.
Start up delay 0…36000 [s] The function is activated after this period after a start.
Monitoring is switched off when the temperature sensor fails.
5.5.5 Supply Minimum Maximum Controller
– Main Index > Configuration > Configuration 1 > Tmp control mode = Room oder
Exhaust
– Main Index > Configuration > Configuration 1 > Supply tmp sensor = Yes
Limits the supply air temperature for pure room or return air control to prevent dis-
charge temperatures that are too high or too low.
Main Index > Unit > Temp control > Min/max ctrlr sply
Parameter Range Function
Min controller 0...100 [%] Present value for the minimum limit controller. Go to con-
troller settings page. This is where you enter all control-
related settings.
Max controller 0...100 [%] Present value for the maximum limit controller. Go to con-
troller settings page. This is where you enter all control-
related settings.
Min setpoint 15...Max setpoint [°C] Lowest allowable supply air temperature for pure room
temperature or return air temperature control. A controlled
limiting of the cooling setpoint controller occurs for supply
Prerequisites
Function
Parameterization
Note
Prerequisites
Function
Parameterization
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 63
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