Siemens RDG20 KN Series Basic Documentation page 92

Functions
4
Control sequences
Modulating control:
3-position or PWM
Note
Note
92 | 180
The diagrams below show the control sequence for modulating PI control.
Heating and cooling (P001 = 4)
Heating mode with manual selection (P001
= 3)
T[° C] Room temperature
w Room temperature setpoint
X Dead zone (P055)
dz
w Setpoint differential
D
(P056)
The diagrams only show the PI thermostat's proportional part.
For setting sequence and control outputs, see Application overview [➙ 42],
Sequence overview (setting via P001) [➙ 75] and Control outputs [➙ 99].
Parameter P256 (RDG26..KN) sets the heating flow limitation when using a PICV.
See Additional functions [➙ 47].
●
YH can only be DC, On/Off or PWM
●
YC can be DC, On/Off, On/Off 3-wired, PWM or 3-position
●
YE can only be DC, On/Off or PWM
Cooling mode with manual selection
(P001 = 3)
YE Control command "EI heater"
YH Control command
"Valve" (heating)
YC Control command " Valve "
(cooling)
XpH Proportional band
"Heating" (P050)
XpC Proportional band "Cooling"
(P052)
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