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On/Off control
Control sequence
ON/OFF output
Notes:
Setting the sequence
and the control outputs
40 / 94
Siemens
Smart Infrastructure
The diagrams below show the control sequence for 2-position.
Heating mode
(automatic changeover = heating or heating only)
Y
E1
V1
w
D
1
w
0
½ SDH
½ SDH
½ SDH
Heating mode with manual changeover (P01 = 2)
Y
E1
1
w
0
½ SDH
½ SDH
· The diagrams only show the PI thermostat's proportional action.
· For the fan sequence see section 3.8.
· For better temperature control performance with 2-position electric heater, we
suggest you set the switching differential heating (P30) to 1 K.
Refer to sections 3.4, 3.6.1, and 3.7.
RDF800KN.., RDF800KN/VB, RDD810KN/NF
Cooling mode
(manual/auto. changeover = cooling or cooling
only)
Y
1
T[°C]
0
½ SDH
½ SDH
T[°C] Room temperature
W
V1
E1
SDH Switching differential "Heating" (P30)
T[°C]
SDC Switching differential "Cooling" (P31)
X
dz
w
D
Basic documentation
E1
V1
x
dz
w
½ SDC
½ SDC
½ SDH
(manual changeover = heating)
Room temperature setpoint
Control command "Valve" or "Compressor"
Control command "Electric heater"
Dead zone (P33)
Setpoint differential (P34)
T[°C]
CE1P3174en
2020-02-21
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