function Innovation & Technology AS
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Manual – KNX MultiLight Art.nr 44001
Doc.no. D-TS-ML-K-005-A
Example:
The regulator function (3) is evaluated every half minute with the parameters
for Electric heating (4K/100min) and a constant error function of e(n)=set_point-
actual_temp=23-21=2. The calculated output is shown in equation (4), where n is the
number of half minute intervals:
100
2
1
)
21
23
(
4
1
)
(
n
n
u
(4)
The graph for the regulator output is shown in Figure 14.
The time factor, n, will be set to 0 when the error function, e(n) becomes 0 or less. The
regulator output is capped to maximum 1.0, which is equivalent to 100% for the control
value communication object.
Figure 14 - Regulator output for constant e(n)=2
6.7
Object list
Table 5 - Object list for the Thermostat
ID
Name
Description
Configuration
OBJ 007
Thermostat:
Actual
temperature
This object shows the measured
room temperature (0.5K resolution).
This value can also be combined
with obj 008 External temperature.
The actual temperature is used as
the feedback to the regulator.
This object will be sent
automatically when the temperature
has changed 0.5K or more. This
object can in addition be set to
cyclic sending by parameter.
2 byte
9.010
C R - T
OBJ 008 Thermostat:
External
temperature
The external temperature can be
weighed from 0 to 100% compared
to object 007.
2 byte
9.010
C - W T
OBJ 009
Thermostat:
Base setpoint
The base setpoint is the desired
temperature in comfort mode
(heating). This value is the origin
for all the different regulator modes.
2 byte
9.010
C R (W) T
0
0,2
0,4
0,6
0,8
1
1,2
1
21
41
61
81
101
121
Regu
lato
r ou
tp
u
t
Time(min)
Regulator output (Kp=0.25, Ti=100, e(n)=2)
Serie1
