Gira KNX 2139 00 Product Documentation page 8

Information on the product | Function
In this case, a short-circuit or overload signal can be transmitted via a KNX commu-
nication object. The actuator can also signal a failure of the valve voltage on the
KNX.
The switch-on times of the valve outputs can be detected and evaluated separately
by operating hours counters. In addition, service operation is available, which, during
maintenance or installation, can move all assigned valve drives to a defined position
(completely opened or completely closed) and can lock them against activation by
command value telegrams. Both service mode and the locking status are preset by a
2-bit forced operation telegram.
Function of the room temperature controller
There are 12 controllers integrated into the device's software that can be used for in-
dividual room temperature control. This allows the temperature to be set in up to 12
rooms or room areas to specified setpoints through independent control processes.
Depending on the operating mode, current setpoint temperature and room temperat-
ure, using a controller means that a command value for heating or cooling control
can be transmitted to the KNX for the control circuit or be forwarded internally to a
valve output. The controller distinguishes between different operating modes (Com-
fort, Standby, Night, Frost/heat protection) each with their own temperature setpoints
for heating or cooling. For heating and cooling functions, you can select continuous
or switching PI or switching 2-point feedback control algorithms.
In addition to the basic level heating or cooling, activating an additional level enables
an additional heating or cooling unit to be used. In this connection, you can set the
temperature setpoint difference between the basic and the additional level by a para-
meter in the ETS. For major deviations between the temperature setpoint and the ac-
tual temperature, you can activate this additional level to heat up or cool down a
room faster. You can assign different control algorithms to the basic and additional
levels.
The room temperatures are recorded per controller by one or optionally by two ex-
ternal KNX temperature sensors (e.g. push-button sensors with temperature meas-
urement).
Logic functions
In addition, the device has 8 internal logic functions. Using these functions, logic
gates (e.g. AND, OR, exclusive OR, each with up to 4 inputs) can be set up and thus
switching and status information can be linked and evaluated. Alternatively, a 1-bit to
1-byte converter and a disabling element with filter and time functions can be con-
figured for each logic function. As a further option, comparators or limit value
switches with hysteresis can be set as a logic function.
The logic functions have their own KNX communication objects and can process tele-
grams of the actuator or of other bus devices.
Update capability
The device can be updated. Firmware can be easily updated with the Gira ETS Ser-
vice App (additional software).
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100 Page 8 of 257