Application-Specific Parameter - Siemens RDG Application Manual

Control sequence (P01)
Multifunctional inputs
(X1, X2, D1)
Control output (P46...P47)

Application-specific parameter

This parameter is used to set the required heating and/or cooling sequence and to select
automatic/manual changeover. Depending on selected application parameter P01 will be
preset as follow:
– 2-pipe or single-duct application: P01: = 1 = cooling only
– 4-pipe application:
Sequence
Mode
Heating only
Parameter P01=0
A sensor of type NTC like QAH11.1 (AI) or a switch (DI) can be connected to the input
terminals. The functionality of the inputs can be freely configured. The factory settings are:
P38: Multifunctional input X1
P40: Multifunctional input X2
P42: Multifunctional input D1
Available function on X1, X2 and D1
Function of inputs
External/return air temperature (AI)
1
(not available for input D1)
2 Heating/cooling changeover (AI/DI)
3 Operating mode switchover (DI)
4
Dewpoint monitor (DI)
5 Enable electrical heater (DI)
6 Fault (DI)
– The RDG100 offers two control outputs, each either of type ON/OFF, PWM or 3-position.
To select the required type use DIP switch and P46 (1st control output) and/or P47
(2nd control output).
– The RDG400 for VAV application offers two control outputs, DC 0...10 V and either
ON/OFF, PWM or 3-position. To select the required type use DIP switch and P46
(reheater/cooler control output) and/or P47 (damper actuator, DC 0...10 V or 3-pos).
P01: = 4 = heating and cooling
Manually select
Cooling only heating or
cooling mode
P01=1 P01=2
RDG range
External temperature sensor (1)
Heating/cooling changeover (2)
Operating mode switchover (3)
Temperature sensor input for
– External room temperature
– Return air temperature
– Floor temperature sensor to limit the heating output
Automatic heating/cooling changeover sensor or switch
Digital input to switch the operating mode to energy saving
Digital input for a dewpoint sensor to detect condensation
Digital input to enable/disable the electrical heater via remote control
Digital input to signal a fault on the digital display (e.g. dirty air filter)
Automatic
Heating and
heating/cooling
cooling mode
changeover
P01=3 P01=4
RDF range
Operating mode switchover (3)
Heating/cooling changeover (2)
N/A
Description
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