Manual / Automatic Burner Startup - Siemens LMV50 Series Manual

Operating mode 6
(Ext LC bus)
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Building Technologies
BACS for control with digital predefined load via bus.
The LMV5 is connected to a BACS via the AZL5 and an external bus interface (e.g.
Modbus).
The BACS contains the controller and transmits the load (manipulated variable) and the
heat request to the LMV5.
In this operating mode, the load controller inside the LMV5 is not required.
-Predefined output
-Demand for heat
BMS
Modbus /
e-bus
Figure 52: Operating mode 6 with load controller

7.3.1 Manual / automatic burner startup

Parameter Autom/Manual/Off (Automatic/ Manual / Burner off)
Parameter SetLoad (0...100% / S1 / S2 / S3)
Parameter Autom / Manual / Off is used to define whether the burner is operated
manually or automatically (controller mode).
Burner off The LMV5 remains in or goes into standby mode, irrespective of
whether the boiler controller demands heat or not. An error message is
not displayed.
Manual The burner is switched on provided that the controller release is present
at terminal X5-03 pin 1 and the start release for the respective fuel
occurs in phase 21 at the terminal (X6-01 / X7-03).
The burner output can then be set using the SetLoad parameter and
must lie within the burner's working range.
Automatic The burner start for the respective fuel (which is present at terminal (X6-
01 / X7-03)) depends on heat demand of controller (X5-03 pin 1) and of
start release (phase 21).
With remote control, parameter Autom / Manual / Off can only be accessed by reading.
Parameter SetLoad – by contrast – can be read and written.
Basic Documentation LMV5...
7 Boiler controller / load controller
Internal
load controller
AZL5...
Manipulated variable,
demand for heat
Manipulated variable,
demand for heat
CAN module
(basic unit)
Manipulated
Demand
variable
for heat
0...100 %
FARC (BU) BC (BU)
CAN bus
CC1P7550en
22.05.2018