Siemens Synco 700 RMZ785 Basic Documentation page 140

Purpose
Configuration
Setting values
Notes
Application example
Note
Siemens
Building Technologies
10.1.7 Heat demand continuous ( )
In addition to the heat demand relay, heat demand can be provided at a continuous
output of other devices. You can set the characteristic of the continuous 0....10 V
signal.
Main menu > Commissioning > Extra configuration > Aggregates > Heat demand >
Operating line
Heat demand modulating
Main menu > Settings > Aggregates > Heat demand >
Operating line
Setpoint at 0 Volt
Setpoint at 10 Volt
Limit value
 "Setpoint at 0 Volt" determines the flow temperature setpoint at DC 0 V.
 "Setpoint at 10 Volt" determines the flow temperature setpoint at DC 10 V.
 "Limit value" means limit value for heat demand: Temperatures below this level
are interpreted as "no heat demand".
Output signal DC 0 V is sent as long as the flow temperature setpoint does not
exceed the set limit value. When the limit value is exceeded, the relevant output
signal is sent until the setpoint is again below the limit value minus a 0.5 K
hysteresis.
Output signal Y (DC 0...10 V) for heat demand corresponds to a flow
–
temperature setpoint range of 0...120 °C. This limit value should be at 10 °C.
The heating flow setpoint may float between 60...90 °C depending on demand.
–
An output signal corresponding to the set characteristic is to be issued at output
–
Y.
DC 0...10 V output is only a continuous signal if "Flow temperature reduction max"
> 0 is set.
The diagram shows the values of the parameters to be set and the resulting
progression of the heat demand signal:
Y [ V ]
10
6
5
0
20
0 20 40 60 80
1 3
Switching and monitoring device RMS705B
H/C demand, H/C changeover
Adjustable values / Comment
---, N.Y1, N.Y2, ... / Enable output.
Range
–50 °C...Setpoint at 10 Volt
Setpoint at 0 Volt...250 °C
Setpoint at 0 Volt...
Setpoint at 10 Volt





w

TV
[°C]
100 120
4 2
w
TV
Factory setting
0 °C
100 °C
10 °C
Setpoint in °C at DC 0 V.
Setpoint in °C at DC 10 V.
Limit value.
Heating flow setpoint = 90 °C.
Flow temperature reduction max,
here 30 K.
Shifting range for output signal.
: Current flow temperature setpoint.
141 / 216
CE1P3124en
01.04.2010