Siemens LMV36.520A1 Basic Documentation page 149



Building Technologies Division
Infrastructure & Citiies Sector
Note
Fuel changeover on the basic unit.
After a change of fuel, the BAC system must rewrite the predefined target output. A
change of fuel can be detected by cyclic sampling of the type of fuel currently burnt.
General setting values for connection of the basic unit to building automation (for factory
settings, refer to the Parameter list):
Bus communication may only be interrupted for the time set.
If communication is disturbed for a longer period of time, the LMV36... basic unit delivers
a fault status message and the values set in the basic unit by building automation are
reset.
No. Parameter
Operating mode BACS
0 = off
141
1 = Modbus
2 = reserved
142 Setback time in the event of communication breakdown
Setting value:
0 = inactive
1...7200 s
148 Default output if communication with building automation is interrupted
Setting values:
For modulating operation the setting range is as follows:
0...19.9 = burner OFF
20...100 = 20...100% burner rating
For multistage operation, the following settings apply:
0 = burner OFF, P1, P2, P3
Invalid = no default output from building automation
Default setting: Invalid
149 Fuel 1: Default output if communication with building automation is
interrupted
Setting values:
For modulating operation the setting range is as follows:
0...19.9 = burner OFF
20...100 = 20...100% burner rating
For multistage operation, the following settings apply:
0 = burner OFF, P1, P2, P3
Invalid = no default output from building automation
Default setting: Invalid
The factory settings of the parameters are shown on the Parameter list.
Note
For a detailed description of parameters 148 and 149, refer to chapter Default output
via building automation.
Basic documentation LMV36...
18 Connection to superposed systems
149/248
CC1P7544en
25.09.2013