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Siemens RXB (KNX) Applications library CLC and RAD description of functions for CC-02 CM110384en_03
Building Technologies Control sequences 28 Feb 2009
•
For dewpoint monitoring, a logic OR operation is applied to the locally connected
sensor and the bus sensor.
•
The result is used in the alarm object room dewpoint alarm output on the bus (see
10.13).
•
When parameterizing, note whether the contacts are NO or NC (see page 102).
•
Note the following for master/slave configurations:
– Dewpoint sensor on master:
The sensor is evaluated locally Æ cooling valve closes.
This information is transmitted to the slaves.
– Dewpoint
sensor on slave:
The sensor is evaluated locally Æ cooling valve closes.
This information is NOT transmitted to the master and further slaves..
•
The controller immediately queries the dewpoint alarm input following a reset
(if configured accordingly and provided a dewpoint is integrated).
8.3 Chilled ceiling and radiator 4-pipe (CLC02)
The applications for chilled ceiling and radiator (4-pipe) each have a continuous heating
and cooling sequence. The room controllers operate with a PI algorithm optimized for
thermal or motorized valve actuators. (For simplicity, the diagram below only shows the
P-control action.)
The control sequences come into operation at the effective setpoints for heating and
cooling (see page 67).
100
0
TR [°C]
Y [%]
SpH SpC
YC YH
H
C
80257
Y Output
signal
TR Room temperature
SpH Effective heating setpoint
SpC Effective cooling setpoint
H Heating sequence
C Cooling sequence
YH Heating valve
YC Cooling valve
8.3.1 Configuration and parameterization
Configure the chilled ceiling as described in section 8.1.
Configure the radiator as described in section 8.1.5.
•
For CLC02, no electromechanic actuators are permitted due to load. (FNC: 10, 12,
18)
•
Also, thermal valves cannot run parallel operation of Y1 / Y2 and Y3 / Y4.
Notes
Notes