Select two limit values for changeover if an analog input signal is used to generate
the changeover signal.
Example: Ch
angeover by
outsi
de temperature
When value "Heating off/cooling on" is exceeded, the H/C changeover signal is
changed to cooling. When "Heating on/cooling off" is below the set value, the H/C
changeover signal is changed to heating. "Attenuation" can be set for the input
signal.
Main menu > Commissioning > Settings > Heating/cooling ch'over >
Setting values
Operating line Range Factory setting
Heating on/cooling off * **
Heating off/cooling on * **
Attenuation 0...100 h 0 h
* Depending on unit.
** Variable units.
If a digital input is used for changeover, operating line "Heating on/cooling off" = 1
and "Heating off/cooling on" = 0 must be set (factory setting).
Note
If changeover by calendar/date and by digital input is configured at the same time,
the controller uses the latter.
Config
uration erro
r
10.4.4 Effect of function H/C
The effect of preselected H/C depends on the type of changeover and if it occurred
locally or via signal from the bus.
160 / 216
Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies H/C demand, H/C changeover 01.04.2010
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