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Siemens Standard application AHU CE1P3977en_02
Building Technologies Configuration 01.02.2010
Parameter Range Explanation
2Steps
TSP function = Steps ---> Possible time switch program settings:
Off, St1, St2.
TSP function = Steps+tmp ---> Possible time switch program set-
tings: Off, Eco1, Eco2, Com1, Com2.
3Steps
TSP function = Steps ---> Possible time switch program settings:
Off, St1, St2, St3.
TSP function = Steps+tmp ---> Possible time switch program set-
tings: Off, Eco1, Eco2, Eco3, Com1, Com2, Com3.
Example 1
Example 2
TSP function = Steps, TSP steps = 2Step.
Fan control using 2 setpoints for St1 and St2. Temperature control
using a setpoint for Comfort mode.
TSP function = Steps+tmp, TSP steps = 3
Fan control using 3 setpoints for St1 and St2 and St3. Temperature
control using separate setpoints for Eco and Comfort.
Under Eco2, the plant operates using the temperature setpoint for
Eco and the fan setpoint St2.
Ext control input No No external input for operating mode switch, timer, button, occu-
pancy detector, etc.
One One input (e.g. off / on).
Two Two inputs (e.g. Auto / Off / St1 / St2).
Alarm outputs No No alarm output.
One One output (e.g. for high alarms).
Two Two outputs (for high and low alarms).
External setpoint No No analog input for connect an external setpoint or an external
setpoint compensation.
Volt Input for one 0-10V DC signal.
Ohm Input for one 0-2500 Ohm signal.
QAA27 Input for QAA27.
BSG21 Input for BSG21 setpoint compensation.
Sensors
Room tmp Sensor No
1 sensor
2 sensor
1 RU
1snsr+1RU
2 RU
Inputs for room temperature sensor. You can select whether to ap-
ply maximum, minimum, average or individual value for control for
more than one sensor in Configuration 2. When selecting 1 RU,
1snsr+RU or 2 RU, the interface to the room unit connection is en-
abled.
Exhaust tmp sensor No
Yes
Input for return air sensor.
Yes+Hold The maximum, otherwise present temperature is stored when shut-
ting down the plant, to the extent the plant ran for more than 5
minutes.
The setting only makes sense when there is no room sensor and
night start operations (e.g. night cooling) without plant kick are to
be used. (Plant kick: Short, cyclical plant start to update the values
of the sensors mounted in the duct).
Supply tmp sensor No
Yes
Input for supply air sensor.
Outs air tmp Sensor No
Yes
Input for outside air temperature sensor.
Yes+Hold The minimum, otherwise present temperature is stored when shut-
ting down the plant, to the extent the plant ran for more than 5
minutes.
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 155
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