3.5.5
Heating
This section is only shown if the thermostat is setup for heating, or for both heating and cool-
ing.
Parameter name
Values
Control method
Two-point control
/ P-I control
The
Control method
parameters determines the algorithm to use for thermostatic control:
Either two-point control with hysteresis (
Two-point control
) or proportional-integral control (
P-I
control
). The latter includes both P-I control with continuous output and P-I control with PWM
output.
Two-point control
Parameter name
Values
Upper hysteresis
1 ...
10
... 100 (x 0.1ºC)
Lower hysteresis
1 ...
10
... 100 (x 0.1ºC)
Resending period
0
... 255 (x 1 min, 0 = Disabled)
When the two-point control method is selected, on/off commands are sent through the 1-bit
Output variable (heating)
communication object. The meaning of the
upper hysteresis
and
lower
hysteresis
parameter is described in detail in section
on page 34.
The value of this communication object may be resent to the bus periodically, according to
the value of the
Resending period
parameter. Setting this parameter to 0 disables periodic
resending.
3.5
Thermostats
88
