Optimum Start/Stop Control - Siemens LMS14 User Manual

Optimum start
control max
Optimum stop control max
Key
156/617
Building Technologies Division

6.5.17 Optimum start/stop control

Optimum start/stop control puts forward in time the change of operating level against
the scheduled point in time, thereby giving consideration to the building dynamics
(heating-up time and cooling down time). This ensures that the required temperature
level is reached at the scheduled point in time. If this is not the case (too early or too
late), a new changeover point is calculated, which is used the next time.
Line no.
HC1 HC2 HC3
790 1090 1390
The change from one temperature level to the other is optimized in a way that the
Comfort setpoint is reached at the respective switching time.
Line no.
HC1 HC2 HC3
791 1091 1391
The change from one temperature level to the other is optimized in a way that the
Comfort setpoint minus ¼ °C is reached at the respective switching time.
TRx
Figure 25: Optimum start/stop control
Line no. Meaning
TRw Room temperature setpoint
TRx Actual value of room temperature
Xoff Forward shift of switch-off time
Xon Forward shift of switch-on time
ZSP Time program
Note!
The time of optimization (forward shift) can be limited to a maximum, separately for
optimum start and optimum stop control. When setting the time of optimization to 0,
the function is deactivated. Optimum start/stop control is possible with or without
room sensor.
User Manual LMS14...
6 The settings in detail
Operating line
Optimum start control max
Operating line
Optimum stop control max
Xoff
1/4 °C
CC1U7471en
07.05.2014