User Manual

11.4.2 Mode of operation
The general limitation function overrides the normal control function with PI control
to adhere to the limitation setpoint when the limitation setpoint is exceeded (up or
down).
You can configure absolute and relative limitation.
Absolute/
relative
limitation
If only one of
these functions is desired, the other function can be disabled by
setting the setpoints far outside.
T [°C]
28 °C
16 °C
temperature
3124D07en
difference low
limit value low
shifting limits
Absolute general limitation
One setpoint each for maximum ("Limit value high") and minimum "Limit value
high" limitation can be entered.
- [Set back]
[General limit controller] (f. e. supply air
temperature)
Principle of operation
(example)
If cooling sequence 4 is enabled, minimum limitation can be lowered by a set value
("Reduction min limitation cooling"). This prevents the refrigeration machine from
being switched off again just after switching on in the case of staged (direct)
cooling.
Special setting for direct
cooling
This function is only enabled if both main controlled variable and input for general
limitation use unit °C.
Note
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies Universal controller 01.04.2010