Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 9 Heating circuit control 2017-09-29
This setting ensures maximum limitation of the flow temperature setpoint.
This setting ensures minimum limitation of the flow temperature setpoint. Minimum
limitation is only active when there is a demand for heat.
Setting "---" (none) deactivates the function.
The rate of increase of the flow temperature setpoint can be limited to a maximum
(called "heating up brake"). In that case, the maximum the flow temperature setpoint
can increase is only the selected temperature per unit of time (K per hour). This
function prevents knocking noises in the pipework and excessive loads on the heat
source.
Setting "---" deactivates the function.
t
t
3133D01
TFlSetpt
TFlSetpt
Maximum increase:
∆TFlSetpt
∆t
t
Time
∆t
Unit of time
TflSetpt
Flow temperature setpoint
∆TflSetpt
Rate of setpoint increase per unit of time
Main menu > Commissioning > Settings > … or
Main menu > Settings > Heating circuit 1 (or 2 or 3) > Limitations
Operating line
Range
Factory setting
Flow temperature max
0…140 °C
80 °C
Flow temperature min
---- / 0…140 °C
----
Flow temperature rise max
---- / 1…600 K/h
----
Frost protection for the plant
Off / On
On
9.8.5 Pulse limitation
Every heating circuit is capable of handling pulses for limiting the load and the
volumetric flow. Prerequisite for the limitation of pulses is a heating circuit plant type
with mixing valve.
The pulses are delivered via the meter inputs of function block "Meter". For more
detailed information about function block "Meter", refer to chapter 12 "Function block
meter". After one or several meter inputs have been configured, pulse limitation can be
set up.
Main menu > Commissioning > Settings > … or
Main menu > Settings > Heating circuit 1 (or 2 or 3) > Limitations > Pulse limitation
Operating line
Range
Factory setting
Meter input --- / 1…4 ---
Type of limitation
Absolute / Scaled
Absolute
Limit value 5…4000 pulse/min 75 pulse/min
Integral action time Tn
0…255 min
60 min
Maximum limitation of
the flow temperature
Minimum limitation of
the flow temperature
Heating up brake
Settings
Meter inputs
Settings