Siemens LMV36.520A1 - Prioritization of Power Sources; Emergency Operation with Several Load Controllers

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Building Technologies Division Basic documentation LMV36... CC1P7544en
Infrastructure & Citiies Sector 10 Connection to load controllers 25.09.2013
10.6 Prioritization of power sources
To simplify configuration of the system, the power source need not be selected. The
system automatically detects the available power sources and selects them. If several
sources are used, they are selected according to the following priorities:
Parameter 942 Priority Active power source
1 highest Chapter Controller-on-contact X5-03, pin 1
When the input is activated, the other power
sources are assessed according to their
priorities. When the input is deactivated, the
burner is off
1 2 Chapter Output with curve settings
2 3 Chapter Manual output
3 4 Chapter Load controller via the building
automation system X92
4 5 lowest Chapter External load controller via analog input
X64 pin 1 / pin 2
The active power source can be read out via parameter 942.
10.6.1 Emergency operation with several load controllers
By making use of the prioritization described above, it is also possible to implement
emergency operation. Should the building automation and control system fail (provided
parameter 148 is set to undefined (--)), the unit switches automatically over to the
external load controller.
A load controller via analogue input or, if existing via contacts can be connected.