62
9.8.59 Basic cooling stage - Minimum control value for basic load (0 - 255)
Options:
Setting option between 0 - 255
The minimum control value of the PI controller defines the minimum value output by the controller. If a minimum value greater than zero is chosen, the control-
ler will not output a lower value, even if it calculates a value that is lower. This parameter can be used to set a basic load, e.g. for operating surface cooling.
Even if the controller calculates the control value zero, a cooling medium will flow through the cooling area to prevent the floor from heating up. Under "Set-
tings of basic load", it is also possible to define whether this basic load will be permanently active or whether it will be switched by the "Basic load" object.
Note:
This parameter is only available when "Control value type" parameter is set either on "PI continuous, 0 – 100%", "PI PWM, On/Off“ or "Fan coil".
9.8.60 Settings of basic load
Note:
Only available when the "Device function" parameter is set on either "Single device" or "Master device" and the control function parameter is set on either "Heat-
ing with additional stage", "Cooling with additional stage", "Heating and cooling" or "Heating and cooling with additional stages".
9.8.61 Settings of basic load - Minimum control value for basic load > 0
Options:
Always active
Activate via object
The function finds application when in the desired area, e.g. with floor heating, the floor is to have a basic warmth The size of the minimum control value
specifies the volume of heating medium that flows through the controlled area, even when the calculation of the control value of the controller would indicate
a lower value.
-
Always active
: Here it is possible to define whether this basic load will be permanently active or whether it will be switched via the "Basic load" object.
-
Activate via object
: When this parameter is selected, the basic load function, which means the minimum control value with a value higher than zero, can be
activated (1) or deactivated (2). If it is activated, then the heating medium will always be fed through the system with at least the minimum control value. If it
is deactivated, the control value can be reduced to zero with the controller.
9.8.62 Combined heating and cooling modes
Note:
Only available when the "Device function" parameter is set on either "Single device" or "Master device" and the control function parameter is set on either "Heat-
ing and cooling" or "Heating and cooling with additional stages".
9.8.63 Combined heating and cooling modes - Switchover of heating/cooling
Options:
Automatic
Only via object
On-site/via extension unit and via object
This function makes it possible to switch between the heating and cooling mode of the device.
-
Automatic
: E.g. for four-conductor systems which allow the switchover between heating and cooling at all times. The device switches automatically between
heating and cooling and to the associated setpoint. "Switchover heating/cooling" is a transmitting object.
-
Only via object
: E.g. for two-conductor systems which are operated in heating mode in the winter and cooling mode in the summer. The switchover be-
tween heating and cooling and to the associated setpoint is carried out via the corresponding communication object. This function is used when a central
switchover of the single room controllers is required. "Switchover heating/cooling" is a receiving object.
-
Local/ via extension unit and via object
: E.g. for four-conductor systems which allow the switchover between heating and cooling at all times. The switcho-
ver between heating and cooling and to the associated setpoint is carried out manually on the device by the user of the room or via the "Switchover heating/
cooling" object via the bus. "Switchover heating/cooling" is a transmitting and receiving object.
9.8.64 Combined heating and cooling modes - Operating mode after reset
Options:
Cooling
Heating
After a bus voltage failure, a system reset, or the attachment of a device to the bus coupler, the device starts in the parameterized "Operating mode after
reset". The operating mode can be changed when the system is running using the options set under "Switchover heating/cooling".
Description of application and parameters
"RTC object" application
