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Room temperature controller | Room temperature controller - General
Image 31: 2-point feedback control for mixed "Heating and cooling" mode with active
Image 32: 2-point feedback control for mixed "Heating and cooling" mode with active
The command value "1" or "0" will be output, depending on the switching status, if the
temperature exceeds or falls below the hysteresis limits or the setpoints.
An additional 2-point feedback control heating or cooling level works exactly the
same as the 2-point feedback control of the basic level. The difference is that the set-
point and the hysteresis values will shift by taking into account the configured level
offset.
Adapting the 2-point feedback control
2-point feedback control represents a very simple temperature control. For this type
of feedback control, two hysteresis temperature values are set. The upper and lower
temperature hysteresis limits can be adjusted via parameters. It has to be considered
that...
–
A small hysteresis will lead to smaller temperature variations but to a higher
KNX bus load.
–
A large hysteresis switches less frequently but will cause uncomfortable tem-
perature variations.
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
heating mode
cooling operation
Page 133 of 257
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