Siemens LMV27.100x2 - 16 Connection to superposed systems; 16.1 General information and building automation functions

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Building Technologies Basic Documentation LMV27... CC1P7541en
15 Special feature: Burner identification 17.12.2018
15 Special feature: Burner identification
The OEM must assign an individual burner identification to every burner. This ensures
that during backup/restore, incompatible parameter sets cannot be copied between
different burners (also refer to the documentation on the ACS410 PC software under
Backup/Restore and in this documentation in chapter Backup / Restore).
No. Parameter
113 Burner identification
16 Connection to superposed systems
16.1 General information and building automation
functions
Communication with building automation is made possible via a data link using the COM
X92 port and a special interface with galvanic separation and physical bus level
adaptation.
This port can be used for connection of a LMV27 with Modbus, depending on the
configuration made.
OCI412.10
RS485
Modbus
LMV...
COM
X92
Figure 73: Connection via interface COM 92 to superposed systems

Note
Breakdown of bus communication.
If the LMV27 detects a breakdown of bus communication, the BAC system must rewrite
the following values upon restoration of communication:
 Modbus: Mode, Modbus operating mode, and predefined target output
General setting values for connection of the LMV27 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 LMV27 delivers a fault
status message and the values set in the LMV27 by building automation are reset.