Operation Manual

Z41 Pro
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If the second option is selected (1-bit object setpoint control), the control
object will be binary, and it will throw a “0” to the bus whenever the user
asks for a setpoint decrement, and a “1” when the user asks for an
increment. How much it is incremented or decreased after every order is
defined through the offset parameter (which accepts values between 1
and 255 tenths of a degree), thus permitting a consistent self-update of the
label in the box after every user press, although the status object will also
admit the reception of feedback from the bus, i.e., the updated absolute
setpoint value sent from the external thermostat.
Figure 54 Relative (1 Bit) Setpoint Control
Finally, when “Relative (float object)” is selected, the control will send 2-
byte floating point values. However, these values will correspond to the
particular increment or decrement (or offset) to be applied each time. This
offset refers to a base temperature and will always be a multiple of 0.5ºC.
As the user touches the increase/decrease buttons in the box, this offset
will vary, always within a certain range defined through the Minimum
Offset and Maximum Offset parameters.
Figure 55 Relative (Float Object) Setpoint Control
Example: suppose the following parameterisation:
- Relative setpoint with a floating point object,
- Minimum offset = -10ºC,
- Maximum offset = 10ºC.
The objects are linked to those from an external thermostat, which can be
supposed to have a base temperature setpoint of 25ºC. After the parameter
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