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Siemens Standard application AHU CE1P3977en_02
Building Technologies Configuration 01.02.2010
Parameter Range Function
Fan steps freq conv Activation of additional digital outputs depending on the selected fan
type.
1Step Digital output to enable variable speed drive (always enabled).
2Steps An additional digital output for optional wiring depending on fan step 2.
3Steps Two additional digital outputs for optional wiring depending on fan step
3.
Flow display Display flow and possible output.
No Function not available.
Yes Display of supply air and (if enabled) exhaust air flow. Analog inputs
are enabled if not already enabled by the fan control setting.
Fan steps type Required output for fan control relating to settings for fan control
mode, TSP steps and fan steps freq conv.
Separated Digital output for each step.
Example:
Fan control mode = direct / TSP steps = 2 / Exhaust fan = Yes
---> 4 digital outputs: Step 1 and Step 2 each, separated for supply air
and exhaust air fans.
SepCombine Separate outputs on the first step, common outputs for additional
steps.
Example:
Fan control mode = pressure / TSP function = Step+tmp / TSP steps =
3 /
Exhaust fan = Yes / Fan steps freq conv = 3.
---> 4 digital outputs: Step 1 each as separate variable speed drive
enable, two additional outputs open for use (Fan steps freq conv) for
Step2 and Step 3.
Binary Outputs for the steps are binary coded. The setting is permitted for fan
control mode = direct or directVar.
Example:
Fan control mode = direct / TSP function = Step+tmp / TSP steps = 3 /
Exhaust fan = Yes
---> 4 digital outputs: 2 digital output each per fan (Step1 = DO1
TRUE; Step 2 = DO2 TRUE; Step3 = DO1 und DO2 TRUE).
Fan alarm Inputs for fan alarms (e.g. thermal contact). Logical 1 = alarm.
No No alarm.
Combined Digital input for common alarm.
Supply Digital input for supply air fan alarm.
Exhaust Digital input for exhaust air fan alarm.
Sply+Exh Two digital inputs for alarms from supply and exhaust air fans.
Fan fdbk Inputs for operating message from the fans (e.g. pressure switch or
relay contact). Logical 1 = Fan running.
No No feedback.
Combined Digital input for common operating message.
Supply Digital input for supply air fan operating message.
Exhaust Digital input for exhaust air fan operating message.
Sply+Exh Two digital inputs for operating messages from supply and exhaust air
fans.
Fan deviation alm Setpoint/actual value monitoring of the pressure or flow. An alarm is
triggered for deviation over a set period.
No No monitoring.
Supply Supply air monitoring only.
Exhaust Exhaust air monitoring only.
Sply+Exh Supply and exhaust air monitoring.
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 160
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