Art. No. ..5192KRMTSD
Art. No. ..5194KRMTSD
4.2.4.3 Room temperature controller
The device unites two independent room temperature controllers (Controller 1 and Controller 2).
Each controller is an independent function section of the device and has its own parameter and
object range in the ETS. Therefore, the room temperature controllers can be switched on or off,
irrespective of the pushbutton sensor function, or configured as a controller extension.
A controller can be used for single-room temperature control. Depending on the operating
mode, current temperature setpoint and room temperature, command values for heating or
cooling control and fan controller can be sent to the KNX. These command values are usually
then converted by a suitable KNX actuator, e.g. heating or switching actuators or directly by
bus-compatible actuating drives, evaluated and converted to physical variables for air
conditioning control.
The controllers of the device can either work as a main controller or as a controller extension.
As the main controller, the room temperature controller function is fully switched on and the
control algorithm activated. Only the main controller transmits control value telegrams. A
controller extension itself is not involved in the temperature regulating process. With it, the user
can operate the single-room controller, i.e. the main controller from different places in the room.
In this way, any number of operating extensions can be set up.
In this chapter, the functions of the room temperature controller are described as the main
controller.
i
The following chapters on room temperature control apply for both Controller 1 and
Controller 2. The functions of both controllers are identical.
4.2.4.3.1 Operating modes and operating mode change-over
Introduction
The room temperature controller distinguishes between two different operating modes. The
operating modes specify whether you want the controller to use its variable to trigger heating
systems ("heating" single operating mode) or cooling systems ("cooling" single operating mode).
You can also activate mixed operation, with the controller being capable of changing over
between "Heating" and "Cooling" either automatically or, alternatively, controlled by a
communication object.
In addition, you can establish two-level control operation to control an additional heating or
cooling unit. For two-level feedback control, separate command values will be calculated as a
function of the temperature deviation between the setpoint and the actual value and transmitted
to the bus for the basic and additional levels. The parameter "Operating mode" in the "Room
temperature control -> Controller general" parameter branch specifies the operating mode and,
if necessary, enables the additional level(s).
"Heating" or "cooling" single operating modes
In the single "Heating" or "Cooling" operating modes without any additional level, the controller
will always work with one command value and, alternatively, when the additional level is
enabled, it will use two command value in the configured operating mode. Depending on the
determined room temperature and on the specified setpoint temperatures of the operating
modes (see chapter 4.2.4.3.4. Operating mode switchover)the room temperature controller will
automatically decide whether heating or cooling energy is required and calculates the command
value for the heating or cooling system.
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Software "Room controller display compact module 146x11"
Functional description
