Art. No. ..5192KRMTSD
Art. No. ..5194KRMTSD
Parameter description
required project design
Operating mode
Heating and cooling
Sending command value for heating and cooling to a
shared object
Yes
Type of control
Continuous PI control
Output of the command value
Normal (under current, this means
opened)
Rotation angle conversion: required settings of the controller parameters
The "heating" and "cooling" command values of the controller function are converted to a rotary
angle for activating a rotary actuator. This in turn, for example, moves a control ball valve.
From a technical point of view, the controller command value of the device is converted to a
1-byte control parameter (0…255) which corresponds to the rotary angle for a rotary actuator.
This control parameter is transmitted to the KNX bus, for example, received from a gateway and
converted. The rotary actuator adjusts the rotary angle transmitted to it. It is mechanically
connected, for example, to a 6-way control ball valve.
The gateway has a 1-byte control input "setpoint" corresponding to the setpoint flap setting or
setpoint volume flow. The angular opening of the ball valve for heating and cooling is to be
taken from the valve curve.
If the rotation angle conversion is enabled, the room temperature controller function continues to
work unchanged. Even the communication objects of the controller remain unchanged.
Additionally, the conversion of the controller command value for heating and cooling is carried
out in one rotary angle. This determined rotary angle receives its own object for activating a
rotary actuator via the MP bus gateway.
The rotary angle is activated based on the controller command values heating and cooling. The
cooling operating mode is in a rotary angle range from 0° to 30° by default. The rotary angle
range for heating is normally between 60° and 90°. Between this at 45° is the deadband of the
rotary angle. Here, 0° stands for cooling performance of 100%. The larger the rotary angle
becomes, the smaller the cooling efficiency. From a rotary angle of 30° the cooling is at 100%.
In this case, the cooling is not active. From a rotary angle of 60° the heating operating mode
begins. The heating performance in percentage terms increases with the enlargement of the
rotary angle up to 100% at 90°.
Page 144 of 309
Software "Room controller display compact module 146x11"
Functional description