Room Temperature Controller; Operating Modes And Operating Mode Change-Over - Gira 5142 00 Product Documentation

4.2.4.2 Room temperature controller

The device can be used for single-room temperature control. Depending on the operating mode,
the current temperature setpoint and on the room temperature, command values for heating or
cooling control and fan control can be sent to the KNX/EIB. Usually, these command values are
then converted by a suitable KNX/EIB 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 room temperature control is an independent function section of the device. It has its own
parameter and object range in the ETS configuration. Therefore, the room temperature
controller can be switched on or off, irrespective of the push button sensor function.
The controller function section 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 a main
controller.

4.2.4.2.1 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 "Controller operating mode" in the
"Room temperature control -> Controller general" parameter branch specifies the operating
mode and, if necessary, enables the additional level(s).
i The "heating and cooling" mixed-mode and the two-level controlled operation are not
available when using two control circuits! In this case only the "heating or cooling single
operating modes are configurable.
"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
room temperature determined and on the specified setpoint temperatures of the operating
modes, 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.
Order No. 5142 00
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Software "Push button sensor 3 plus"
Functional description
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